INSTRUCTION BOOK FOR SAILOR S1303/S1304-I 

INSTRUKTIONSBOG FOR SAILOR S1303/S1304-I 

AIS S. P. RADIO. PORSVEJ 2 . 9200 AALBORG SV . DENMARK 
AIS S. P. RADIO. PORSVEJ 2 . 9200 AALBORG SV . DENMARK 

AIS S. P. RADIO. PORSVEJ 2 . 9200 AALBORG SV . DENMARK 
Page 
FOR YOUR INFORMATION 
This preliminary instruction book for S1303/04-I is based on the instruction book for S1303/1304, which you have to observe when using the service section in this preliminary book. 
The vco and HARMONIC FILTER modules have the module numbers 1200/1300 because the modules from the receiver Rll19/1120/1121 have been used in S1303/1304-I. 
Vco module 1200/R11XX = module 300 S1303/04-1. 
HARMONIC FILTER module 1300/R11XX = module 400 S1303/1304-I. 
If you want to receive the final instruction book when it is ready, please fill in the form in front of this book and return it to us. You will then receive the final instruction book when it is ready. 

CONTENTS 
PAGE 
GENERAL DESCRIPTION 	1 
TECHNICAL DATA	2 
CONTROLS	3 
PRINCIPLE OF OPERATION	5 
PRINCIPAL DESCRIPTION OF TELEGRAPHY MODE	10 
PRINCIPAL DESCRIPTION OF TELEX MODE	11 
PROGRAMMING OF S1304 FREQUENCIES	13 
SERVICE: 
1. MAINTENANCE	15 
2.	NECESSARY TEST EQUIPMENT	16 
3.	TROUBLE -SHOOTING	24 
4.	PERFORMANCE CHECK	28 
5. ADJUSTMENT PROCEDURE	35 
6. NECESSARY ADJUSTMENTS AFTER REPAIR	41 
7.	FUNCTION CHECK	43 
PIN CONFIGURATIONS 
ADJUSTMENT OF MODULE AND TEST POINT LOCATIONS
PARTS LIST 
CIRCUIT DESCRIPTION AND SCHEMATIC DIAGRAMS
MAIN SCHEMATIC DIAGRAM 

CONTROLS 

DISPLAY
Displays the keyed-in figures or the transmitted frequency. 
EXT. FRO. CONTROL 
With the switch    in position EXT. FRO. CONTROL the lamp lights. The displayed and transmitted frequency can be controlled from an external unit the SAILOR ARO H1240. 
ILLEGAL FREOUENCY 
When the displayed frequency is a non operative frequency, the lamp lights. 
2182 kHz SELECTED 
With the switch     in position 2182 kHz SELECTED the lamp lights. The displayed and transmitted frequency is 2182 kHz. 
REDUCED
Is alight when the output power is reduced by the power switch 
A3J (J3E), A3H (H3E) and A3A (H3E). 
Selects transmission mode A3H (H3E), A3A (R3E) or A3J (J3E). 
TUNE -* 
During tune procedure a fixed light is seen. When the lamp turns off the transmitter is ready for use. Is the lamp flashing at a slow regular rate the transmitter can be ready for use but with a SWR above 2, or the transmitter can be blocked. 
AERIAL CURRENT 
Shows the current at the aerial insulator of AT1500. 
3 

CONTROLS cont. : 
TUNE 
Starts the automatic tune system of Tl130 and AT1500. 
SEND ALARM/TEST ALARM 
When SEND ALARM and TEST ALARM are activated simultaneously. The transmitter is keyed and transmits the two-tone-alarm signal. 
TELEX, A2H (H2A) and Al (A1A) 
Selects the transmission mode TELEX (F1B, F1C) or the TELEGRAPHY modes, 
A2H (H2A) or Al (AlA). The modulating frequency in A2H (H2A) mode is 465 Hz. 
TEST ALARM 
Starts the two-tone-alarm signal generator. The signal can be heard in the micro/telephone. 
DIMMER
Controls the light intensity of the DISPLAY, the aerial current METER and the lamps EXTERNAL FRO. CONTROL, 2182 kHz SELECTED, POWER REDUCED. 
POWER
Reduces the RF output power in four 5 dB steps. 
DISPLAY INPUT SWITCH 
With the switch in position KEYBOARD the displayed and transmitted frequency is keyed-in from the keyboard. With the switch in position EXT. FRQ. CONTROL the displayed and transmitted frequency is controlled from an external unit (SAILOR ARQ H1240). 
With the switch in position 2182 kHz SELECTED the displayed and transmitted frequency is 2182 kHz. 
CLEAR
When pushed the display is cleared and a new frequency can be keyed-in. 
KEYBOARD
Enters the frequency into the frequency synthesizer and the display. The frequency shall be entered in kHz, and only if a fractional kHz is wanted it is necessary to activate the decimal point key. Before a new frequency is entered, and if a wrong figure is keyed-in, all the display is cleared by means of the clear key C and the new frequency can be keyed-in. 
DECIMAL POINT KEY 
If a fractional kHz is wanted it is necessary to activate the decimal point key. 
USB/LSB
If fitted, the transmitted sideband, the upper or the lower, can be chosen by the switch. 
For further instruction see OPERATING INSTRUCTIONS FOR SAILOR PROGRAMME 1000/B 

4 

PRINCIPLE OF OPERATION 

5 

5.	
CIRCUIT OESCRIPTION FREQUENCY CONTROL S1303/04 
The frequency control unit receives the frequency input from the keyboard (or external equipment) and transfers this input to usable codes for control units in exciter and PA-unit. The frequency information from the keyboard 
is converted to a six digit BCO-code which is used in the diyider unit and 
by the frequency check unit (S1304). A five bit code (T, V, X, Y, Z) is generated from the three most significant of the six digit BeD-code. With this five bit code the frequency area (1,6 - 28 MHz) is split up in a certain amount 
of bands. The area 1,6 - 8,5 MHz is covered by 21 codes and the frequency 
bands 12, 16, 22, 25 and 2182 MHz fixed are allocated one code each. Two 
codes are used for blocking of the PA-stage (00000, 11111). Since five bits 
give 32 possible codes, there are four left for special use. The five bit 
code controls the VCO and bandfilter selection in the exciter. Besides it 
is used in the PA-stage to control the pre-setting of the aerial coupler. 

In addition it is used in connection with selection of drive level potentiometer and harmonie filter in the PA-stage. 

FREQUENCY STORE 

Read-in begins in the 100 Hz digit and if a new number is keyed in, the former shifts a step to the left in the display and so on. When the point key is activated, a zero is read in on the 100 Hz place, and af ter this the digits to the left of the point must not be changed by a new key press. This is obtained by putting IC2108-IC2112 in parallel mode by means of IC2129a. A subsequent key press will cause a read-in of the digit into IC2107, besides IC2129b will change state and thereby set IC2107 in parallel mode, which will prevent further input into IC2107 until CLEAR has been activated~ A press on the TUNE button will cause the same change of mode for IC2107-IC2112. 22V for TUNE will, via gate 28 and gate 27, cause a zero read into IC2107. Furthermore IC2129b and IC2129a will change state in the mentioned order and thereby set IC2107-IC2112 in parallel mode. When lC2129a is cleared by IC2129b, it will clear IC2126a, which will turn on the point in the display.
FREQUENCY INPUT VIA KEYBOARD 
The key CLEAR zero-es the register lC2107-IC2112 and sets IC2129a and clears IC2129b so that serial input to lC2107-IC2112 is permitted. A subsequent key press sets up, via lC2119 and IC2120, the BCD-code for the digit in question on the data inputs of IC2121. Simultaneously the monostable FF IC2124b is trigged and af ter 7 msec (it is assumed that keybounce is over now) it returns and clocks the digit information into IC2121, which is a four bit register. Furthermore the monostable FF IC2124a is trigged by IC2124b and thereby allows the oscillator IC2133d to start. Now the digit information in IC2121 is fetched via IC2122 and clocked into the register IC2107 on the positive edge of the clockpulses. IC2122 is an eight input multiplexer. The output YO is connected to one of the inputs 01-08 of which one is selected with the code on inputs A, B, C. IC2122 is controlled by the counter IC2130 which counts up on the negative edge of the clockpulses to the shift register IC2107. When the counter reaches four it stops the oscillator via IC2127 and IC2131. Later the monostable FI IC2124a returns and clears the counter IC2130. Now the ciruit is ready for another key press. The timing of the keyboard input is shown in fig.2. 
The frequency input is stored in six eight bit shift registers IC2107-IC2112, which can be loaded both in parallel and in serial mode, depending on the 
logic level of the S/L input "0" for parallel mode. The frequency information runs in series into the registers and when the input is finished, the, registers are shifted to parallel mode, and now they will be loaded with their own information if any clockpulses come (can occur by activating the keyboard keys ) . 

FIG.Z 
TIMING Of FREIlUENCY INPUT VIR KEYBOARD 

FREQUENCY INPUT FROM EXTERNAL EQUIPMENT 
The external input mode is obtained when the input EXT. FRQ. CONTROL is grounded. Then IC2129b is cleared and IC2129a is pre-set and hereby the registers IC2107 IC2112 are ready for serial input. The serial data must consist of 24 data bits with corresponding clockpulses. The clock and datapulses are shaped in the Schmidt triggers IC2133b and IC2133a. To avoid disturbance from the keyboard, IC2122 is cleared on pin 7 and IC2124b on pin 11. 
At external frequency input the PA-stage is blocked when the first clockpulse arrives, and when the read-in is over~ a tune information is sent to the PA-stage, if the HT ON input is held on 22V. If HT ON is low at the end of a read-in the transmitter will not tune automatically, but now it will tune when HT ON is turned on 22V. The circuit which handles the above-mentioned events consists of IC2125a, IC2125b and surrounding components. The actual timing of transmitter blocking and tuning is shown in fig. 3. 

THE 5HDIYN DIAGRAM IS DNLY VAliD IF HT ON' ZZY flND EXTERNRL FREIlUENCY INPUT 15 SELECTED IoIHICH eRUSt IC 2125a.'s pin 5 ON DY, 
GENERATION OF THE FIVE BIT CODE (T, V, X, Y, Z) 
The five bit code is programmed in the PROMs IC2114 and IC2115. The frequency information from 10 MHz, 1 MHz and 100 kHz digits is used to address one of the two PROMs. In this way it is possible to change band code in 100 kHz steps. The 10 MHz and 1 MHz BCD-codes are in a BCD to binary converter IC2216 and IC2118 transformed to a binary code which addresses the PROMs, besides this circuit selects the PROM which has to be active. The BCD to binary conversion takes place in an adder IC2116. A fixed figure (depending on 10 MHz input) on the B-input of the adder is added to the 1 MHz input on the A-input. This, results in a binary representation of the BCD-digits at 10 and 1 MHz. The used figures on input Bare shown in table 1. To 2182 kHz fixed corresponds a special band code which is obtained by turning high the address inputs A2 and A3 on IC2114 and IC2115. 

	FREQUENCY 	B4B3B2Bl 	B-Input on ADDER IC2116 
	0 < f < 10 MHz 	0 0 0 0 	IC2115 selected 
	10 < f <  20 MHz 	1 0 1 0 
			1C2114 selected 
	20 < f < 30 MHz 	0 1 0 0 
Additionally the PROMs contain a blocking possibility for the PA-stage with 100 kHz steps. To block the transmitter it is necessary to programme a "1" in the output 1 on the desired 100 kHz steps. The blocking takes place via T2105 and T2101. 
TABLE 1 

DISPLAY DRIVER 
The display is a LCD display which demands an alternating voltage across every segment. A segment is turned on if the alternating voltage on the backplane is out of phase with the alternating voltage on the segment in question, and the segment is off if the voltages are in phase. The oscillator IC2133c runs at 100 Hz which is divided by two in lC2126b. The 50 Hz signal is led to the backplane driver 3/4 IC2132 via a level shifter T2112. Additionally the 50 Hz signal is used in the segment drivers IC2101-1C2106 which converts the BCD-input to a seven segment code, and with an alternating output voltage for the LCD segments. The point in the display is driven from 1/4 IC2132 and the state of it (ON/OFF) is established by IC2126a. Depending of the logic state on pin 13 of lC2123 the exclusive - or gate acts as an inverter 
or a non-inverter and hereby turns the point on or off. 

PRINCIPAL DESCRIPTION OF TELEGRAPHY MODE 
TELEGRAPHY: 
See principal diagram above. 
PULSE SHAPING: 
When the key is pressed and released the transmission starts and stops. The switch off time of the transmitter is delayed 9-12 msecs in order to produce the correct output signal shape (R1052, C1018). 
FULL BREAK-IN: 
The receiver is blocked for a time period of about 10-20 msecs af ter the key is re- leased. This secures full break-in on the receiver. 
MUTE: 
The receiver can be blocked when a DC voltage is applied to MUTE. 
EXT. TX BLOCK: 
The transmitter can be blocked when a DC voltage is applied to EXT. TX BLOCK. 
MUTE (open TX): 
MUTE (open TX) can be used to block another transmitter when key down. 
SLOW MUTE: 
SLOW MUTE: can be used to block another transmitter. 

10 

PRINCIPAL DESCRIPTION OF TELEX MODE 
See the principal diagram above. 
TELEX: 
TX READY: 
Indicates that the transmitter is switched on. 
HT ON: 
Switch on the 22V DC supply to the exciter and the 8V DC supply to the power unit ( T 1130 ) . 
TT 
This information is used to switch the short wave set between transmit and receive mode by setting open TX on/off. 
When TT from telex is in transmit mode the transmitter is open and the receiver 
is blocked. When TT from telex changes to the receive mode the transmission stops immediately and the receiver is blocked for another 10-20 msecs controlled from the TIME DELAY (adjustable with R1819). This delay must last until the transmitter output is less than the sensitivity of the receiver. The delay is pre-adjusted from the factory to 12 msecs which secures a good reception with only 20 dB attenuation between the receiver and the transmitter aerials. 

11 

PRINCIPAL DESCRIPTION OF TELEX MODE cont.: 
TUNE READY: 
Indicates that the transmitter is ready to transmit, a steady yellow light is seen on the exciter front plate. 
MUTE (open TX): 
Is connected to TT and can be used to block another transmitter. 
EXT. TX BLOCK: 
The transmitter can be blocked when EXT. TX BLOCK is activated. 
SLOW MUTE 
Is connected to transmitter start and can be used to block another transmitter. When the exciter is in TELEX MODE transmitter start is activated. 
MUTE: 
The receiver can be blocked when MUTE is activated. 
AF TO TELEX: 
A constant level AF output from the receiver to the telex equipment. 
AF FROM TELEX 
The AF input signal from the telex equipment to the exciter is connected here. 
DATA FROM TELEX/CLOCK FROM TELEX 
This are input terminals to the exciter external frequency control. The transmitting frequency can be controlled by data on this input terminals. 
12 

PROGRAMMING OF S1304 FREQUENCIES 
To open a new transmitting frequency in the exciter S1304 it is necessary to program the PROM's IC2512, IC2510 and IC2508 placed on the frequency check band. 
The PROM's are preprogrammed with a set of frequencies, but not all the prom addresses are used. The not used addresses can be programmed when it is wanted to open a new transmitting frequency. 
To program a new frequency into the PROM's the PROM PROGRAMMER SAILOR H233 together with the address input unit SAILOR H237 can be used. 
PROGRAMMING EXAMPLE S1304: 
1.	Select the appropriate PROM-manufactor on the PROM PROGRAMMER H233. 
2.	Activate the RESET button on the PROM PROGRAMMER H233 once. 
3.	Press the INSERT push button on the PROM PROGRAMMER H233. 
4.	The PROM to be programmed is placed in the appropriate socket. 
Start the programming procedure with IC2508. 
6.	Release the INSERT push button. 
7.	Change the address input from the ADDRESS UNIT H237 until a not used address is found. All the red diodes will be a light. 
8.	Select the output code to be programmed by means of the eight slide switches. 
The output code is indicated by the yellow diodes with a lighting diode representing a logic "high" level. 
9. Activate the BURN push button on H233. 
10. The red and yellow diodes shall now show the same code. 
11.	Change IC2508 by IC2510. 
12.	Set up the wanted frequency code and push the BURN button. 
13.	Change IC2510 by IC2512. 
14.	Set up the wanted frequency code and push the BURN button. 
15.	Replace the PROM's in the exciter and control, by setting up the programmed frequency on the display, that the yellow diode ILLEGAL FREQUENCY on the front plate is not alight. 
If more frequencies are to be programmed, start at point 1. of this procedure for every new frequency. 
13 
PROM IC2512 is programmed with the 10 MHz and 1 MHz frequency information in BCD code. 
PROM IC2510 is programmed with the 100 kHz and 10 kHz frequency information in BCD code. 
PROM IC2508 is programmed with the 1 kHz and 100 Hz frequency information in BCD code. 
IC2508: address set up 9A 
wanted frequency 7.5 kHz 
01 02 03 04 05 06 07 O8 
	BCD: 	 1  0  1  0  1  1  1  0 

PROGRAMMING OF S1304 FREQUENCIES cant.: 
14 
CONVERTION TABLE (decimal to BCD). 

SERVICE 
I. MAINTENANCE 
2.	NECESSARY TEST EQUIPMENT 
3.	TROUBLE-SHOOTING 
4.	PERFORMANCE CHECK 
5.	ADJUSTMENT PROCEDURE 
6.	NECESSARY ADJUSTMENTS AFTER REPAIR 
7.	FUNCTION CHECK 
I. MAINTENANCE 
1.1
When the SAILOR SHORT WAVE PROGRAMME 1000/B has been correctly instalied, the maintenance can, depending on the environment and working hours, be reduced to 
a performance check at the service workshop at intervals not exceding 5 years. 
A complete performance check list is enclosed in the PERFORMANCE CHECK section. 
Also inspect the antennas, cables and plugs for mechanical defects, salt deposits, corrosion and any foreign bodies. 
Along with each set a TEST SHEET is delivered, in which some of the measurings made at the factory are listed. If the performance check does not show the same values as those on the TEST SHEET, the set must be adjusted as described under ADJUSTMENT PROCEDURE. 
Any repair of the set should be followed by a FUNCTION CHECK of the unit in question. 
15 

2. NECESSARY TEST EQUIPMENT 
TX 	EXC 	RX 	PS 	
X 	X 	X 	X 	
X 	X 	X 		
	X 	X 		
X 			X 	
	X 	X 		
TX : T1127, T1127L, T1130 
EXC: S1300, S1301, S1302, S1303, S1304 
RX : R1119, R1120 
PS : N1400, N1401, N1407, N1409 
PASSIVE PROBE: 
Attenuation 	20 dB (10X) 
Input resistance 	10 Mohm 
Input capacitance 	15 pF 
Compensation range 	10 - 30 pF 
E.g. PHILIPS type 	PM8925 
TONE GENERATOR: 
Frequency range 	200 – 3000 Hz 
Output voltage 	lV RMS 
Output impedance 	600 ohm 
E.g. PHILIPS type 	PM5107 
MULTIMETER:
Sensitivity DC (f.s.d.) 	0.3V & 3A 
Input impedance 	30 kohm/V 
Accuracy (f.s.d.) 	+1% 
Current range 		100 A 
Vol tage range 		500V & 2.5 kV 
E.g. Unigor 	type 	A43 
	Shunt 	type 	GE4277 
	H.T. probe type 	GE4196 
MULTIMETER:
Sensitivity DC (f.s.d.) 	lV 
Input impedance 	10 Mohm 
Accuracy (f.s.d.) 	+2% 
E.g. PHILIPS type 	PM2505 
OSCILLOSCOPE:
Bandwidth 	DC - 35 MHz 
Sensitivity 	2 mV/cm 
Input impedance 	1 Mohm/30 pF 
Triggering 	EXT-INT-ENVELOPE 
E.g. PHILIPS type 	PM3216 
16 

SIGNAL GENERATOR: 
Frequency range 	0.1 - 30 MHz 
Output impedance 	50/75 ohm 
Output voltage 	1 uV - 100 mV EMF 
Modulation 	AM, 30%, 1000 Hz 
Ext. modo 	300 - 2700 Hz 
Ext. modo sensitivity 	lV for M = 0.3 
E.g. PHILIPS 	PM5326 
TX 	EXC 	RX 	PS 		
		X 				
					I 	
	X 	X 			I 	
		X 				
X 			X 			
	X 					
				I 		
				I 		
		, 				
AF VOLTMETER: 
Sensitivity (f.s.d.) 	300 mV 
Input impedance 	4 ohm 
Accuracy (f.s.d.) 	+5% 
Frequency range 	100 - 3000 Hz 
E.g. PHILIPS type 	PM2505 
FREQUENCY COUNTER: 
Frequency range 	100 Hz - 30 MHz 
Resolution 	0.1 Hz at f 10 MHz 
Accuracy 	lxl0-7 
Sensitivity 	100 mV RMS 
Input impedance 	1 Mohml125 pF 
Single period range 	1 sec. 
Resolution 	1 mSec. 
E.g. PHILIPS type 	PM6611 + PM9679 
NECESSARY TEST EQUIPMENT cont.: 
POWER SUPPLIES: 
S 1300, S 1301 
Vout 1 	22V 
Iout 1 	1.5A 
Vout 2 	-45V 
Iout 2 	-O.lA 
E.g. SAILOR types 	N1402 
N1402 spec. N1405 
17 
POWER SUPPLIES: 
N1400/Tl127, N1407/Tl130 
Vout 	26.5V DC 
Iout N1400/Tl127 	70A DC 
Iout N1407/Tl130 	35A DC 
E.g. 2 pcs. LAMBDA type (N1400/T1127) LXS-G-24-0V-R 1 pc.  LAMBDA type (N1407/Tl130) LXS-G-24-0V-R 

NECESSARY TEST EOUIPMENT cont.: 
TX 	EXC 	RX 	PS 	
	X 	X 		
	X 			
	X 			
	X 			
	X 			
X 				
X 				
	X 			
TEST BOX S1300/S1301: 
S.P. type 	S1300/01 Test box 
ARTIFICIAL KEY S1300TT/S1301: 
S.P. type 	Artificial key 
POWER METER: 
Power range Tl127 	500W 
Power range Tl130 	250W 
Impedance 	50 ohm 
E.g. Bird Thruline Wattmeter 	Model 43 
	Plug-in element Tl127 	500W 2-30 MHz 
	Plug-in element Tl130 	250W 2-30 MHz 
RF AMMETER (Thermocross): 
Current range 	5A 
E.g. Helweg Mikkelsen & Co. 
	Copenhagen, Denmark type 	TR-68x71, 5A 
TEST BOX S1302/S1303/S1304: 
S.P. type 	S1302/03/04 Test box 
ARTIFICIAL KEY S1303/S1304: 
S. P. type 	Artificial key S1303/S 1304 
DUMMY LOAD: 
Impedance 	50 ohm 
Frequency range 	0-30 MHz 
Power range 
E.g. Fixed resistor 2 pcs. in 
	parallel PHILIPS type 	2322 212 13101 
Rll19, Rl120; S1302, S1303, S1304 
Vout 1 	~22V 
Iout 1 	lA 
Vout 2 	8V 
Iout 2 	lA 
Vout 3 	-45V 
Iout 3 	-0. lA 
E.g. SAILOR types 	N1402 spec. 
N1405 
18 

IOohm /200W /)0/7 ifldtlc/;ye 
DUMMY LOAD for HF bands, 4 - 25 MHz: 
Impedance 	50 ohm 
Frequency range 	4 - 25 MHz 
Power range 	400W 
SWR 	1:1.2 
E.g. Bird Termaline Coaxial Resistor Model 8401 

NECESSARY TEST EOUIPMENT cont.: 
TX 	EXC 	RX 	PS 	
X 	X 			

DUMMY LOAD for C.T. band 1.6 - 4 MHz: 
IJIOIJE PROBE 
19 
E.g. Draloric type 06-1291TD 20x50L 8KVs 250 pF ~20% R85 E.g. 10 pcs. Dale type PH-25A-17, 100 ohm, 5%, 25W 
AA/{9 
Inf ceramic 
10 mu/I/me/er 
LAYOUT OF T/iE PR08E 

NECESSARY TEST EOUIPMENT cont.: 
s 
;11; rvot. fLHed en testbox for S1303/01 
TVXYZ: 
The diodes are alight according to the chosen bandcode . 
TRANSMITTER START: 
The diode is alight when handset key is activated, when TUNE, and in SEND ALARM. 
In S1303/04 the diode is alight in TELEX and in TELEGRAPHY. 
PA BLOCK: 
The diode is alight when dummy and 2182 kHz is chosen at the same time and the diode will flash once when dummy load is chosen. 
SIMPLEX RELAY: 
The diode is alight when TUNE is activated in 2182 kHz + handset key is on, and in SEND ALARM. 
22 

SCEMATIC DIAGRAM FOR TESTBOX S1302/03/04 

NECESSARY TEST EQUIPMENT cont.: 
ARTIFICIAL KEY FOR S1303 and S1304. 

The ARTIFICIAL KEY is designed to connect between the EXCITER S1303/04 and the TESTBOX S1302/03/04. The necessary wires are fed through to the TESTBOX S1302/ 03/04 and a multivibrator keys via two transistors the exciter in the telex and telegraphy mode. The key frequency is approx. 15 Hz. An output TRIG OUT taken from the multivibrator can be used to trig an oscilloscope. An input terminal can be used to feed an AF signal into the exciter to modulate it is TELEX mode. 
The switch on the front plate of the ARTIFICIAL KEY is together with the square wave on pin 25 used to test the external frequency read in. 
23 

3. TROUBLE-SHOOTING 
Trouble-shooting should only be performed by persons with sufficient technical knowledge, who have the necessary test equipment at their disposal, and who have carefully studied the operation principles and structure of the unit in question 
Start to find out whether the fault is somewhere in the antenna ei reu it, the power source, or in the short wave set. 
When the fault has been located to a certain unit look up the PERFORMANCE CHECK list in the instruction book and make relevant performance check to incircle the fault. Then look up the CIRCUIT DESCRIPTION. This section contains schematic diagrams, description of the modules and pictures showing the location of the components. (ADJUSTMENT LOCATIONS). 
Typical AC and DC voltages are indicated on the schematic diagrams. 
No adjustment must take place unless the service workshop has the necessary test equipment to perform the ADJUSTMENT PROCEDURE in question. 
Af ter repair or replacement of a module look up the section NECESSARY ADJUSTMENT; AFTER REPAIR to see, whether the unit has to be adjusted or not. 
The unit has to have a complete FUNCTION CHECK af ter repair. 
TROUBLE-SHOOTING IN THE FREOUENCY GENERATING CIRCUIT 
LOOP 1 
If the fault has been located to Loop 1 the following hints can be used for trouble-shooting. 
If the re is no ou tpu t signal from the VCO the fault has to be found in the VCO unit. 
If the output frequency from the VCO is lower than the low frequency limits or higher than the high frequency limits of the 2 MHz band in question, the phaselocked Loop 1 is out of loek. For VCO frequencies look-up the section PRINCIPLE OF OPERATION. 
1. Check the Loop 
mixer output signal on the terminal "Loop 1 out". 
a.	If there is no output signal, the failure is on Loop 1 mixer, harmonie filter unit or VCO unit. 
b.	If the output frequency is approx. 2 MHz or approx. 5 MHz, the VCO unit Loop 1 mixer and the harmonie filter unit are apparently ok. 
2.	Check that the frequency on the phase/frequency detector IC106, pin 1 is 1 kHz. 
24 

TROUBLE-SHOOTING cont.: 
5.	Check the integrator lC202 on Loop 1 filter & ~18V supply unit. 
a.	lf the DC voltage on the terminal "PDl in" is approx. 0.7V and the DC voltage on output terminal of IC202, pin 6 is approx. -4V, the integrator IC202 is apparently ok. 
b.If the DC vol tage on the terminal "PD 1" is approx. 2.3V and the DC voltage on the output terminal of IC202, pin 6 is approx. -17V, the integrator IC202 is apparently ok. 
6.	If the failure has not been found yet the 1 kHz loop filter IC201 and the wirings to the VCO must be checked. 
LOOP 2 
If the fault has been located to Loop 2 the following hints can be used for trouble-shooting. 
If there is no output signal from the vcxo and Loop 2 filter on the terminal "VCXO out", the failure has to be found in the VCXO. 
If the output frequency from the VCXO and Loop 2 filter on the terminal "vcxo out" is lower than 10.098 MHz or higher than 10.099 MHz, the phase-locked Loop 2 is 
out of lock. 
1.	Check the output signal on VCXO and Loop 2 filter terminal "Loop 2 out". 
a.	If there is no output signal, the failure is in the Loop 2 mixer or the 10 MHz injection signal is missing. 
b. If the output frequency is slightly lower than 98 kHz or slightly higher than 99 kHz, the VCXO, Loop 2 mixer and the 10 MHz injection signal are apparently ok. 
2.	Check that the frequency on the phase/frequency detector ICl13, pin 1 is 100 Hz. 
25 
3.	Check the Loop 1 programmable divider. 
a.	If the frequency on the input terminal "Loop 1 in" is app rox , 2 MHz and the frequency on the phase/frequency detector IC106, pin 3 is lower than 1 kHz, the programmable divider is apparently ok. 
b . If the frequency on the input terminal "Loop 1 in" is approx. 5 MHz and the frequency on the phase/frequency detector IC106, pin 3 is higher than 1 kHz, the programmable divider is apparently ok. 
4.	Check the phase/frequency detector IC106. 
a.	Measure 1.5V DC on the terminal "PD1 (1.5V) out" on divider unit. 
b.	If the input frequency on lCl06, pin 3 is higher than 1 kHz and the DC voltage on the terminal "PD 1 out" on divider unit is approx. O. 7V, the phase/frequency detector is apparently ok. 
c.	If the input frequency on IC106, pin 3 is lower than 1 kHz and the DC voltage on the terminal "PDl out" on divider unit is approx. 2.3V, the phase/ frequency detector is apparently ok. 

TROUBLE-SHOOTING cont.: 
3.	Check the Loop 2 programmable divider. 
a.	If the frequency on the input terminal "Loop 2 in" is approx. 97 kHz and the frequency on the phase/frequency detector ICl13, pin 3 is slightly lower than 100 Hz, the programmable divider is apparently ok. 
b , If the frequency on the input terminal "Loop 2 in" is approx. 100 kHz and the frequency on the phase/frequency detector IC113, pin 3 is slightly higher than 100 Hz, the programmable divider is apparently ok. 
4.	Check the phase/frequency detector IC113. 
a. Measure 1.5V DC on the terminal "PD2 (1.5V)" on the divider unit . 
b. If the input fre.quency on IC 113, pin 3 is lower than 100 Hz and the DC voltage on the terminal "PD2 out" on divider unit is approx. 0.7V, the phase/ frequency detector is apparently ok. 
c.	If the input voltage on ICl13 is higher than 100 Hz and the DC voltage on the terminal "PD2 out" on divider unit is approx. 2.3V the phase/frequency is apparently ok. 
5.	Check the integrator IC601 on VCXO and Loop 2 filter. 
a.	If the DC voltage on the terminal "PD2 in" is approx. 0.7V and the DC voltage on output terminal of IC601, pin 6 is approx. 17V, the integrator IC601 is apparently ok. 
b.	If the DC voltage on the terminal "PD2 in" is approx. 2.3V and the DC voltage on the output terminal of IC601, pin 6 is approx. lV, the integrator IC601 is apparently ok. 
6. If the failure has not yet been found the 100 Hz loop filter must be checked. 
26 

4. PERFORMANCE CHECK FOR S1303/04 
Befare executing the performance check the exciter must be connected to the power supplies +22V, +8V, and -45V (N1405) via the testbox S1303/04 and the artificial key for S1303/04. These two test boxes must be connected in series. The RF output connector must be loaded with 50 ohm. 
It is necessary to change the proms IC702, IC2114, IC2115 with the supplied test proms. 
The test proms have the following check sums: IC702 "OFDA", IC2114 "0674", IC2115 IDD6C". 
The following performance check steps start with the selected frequency and the selected modulation mode of the exciter, e.g. Al, tune. 
4.1.
DC CONTROL 
4.1.1. 
Connect voltmeter to TP1. 
4.1.2. 
Check the voltage to be within 18V +/-0.2V. 
4.1.3. 
Connect voltmeter to TP2. 
4.1.4. 
Check the voltage to be within -18V +/-0.2V. 
4.1.5.
Connect voltmeter between TP1 and TP3. 
4.1.6. 
Check the voltage to be within 100 mV. 
4.1.7.
Connect voltmeter to TP31. 
4.1.8. 
Check the voltage to be within 5V +/-0.2V. 
4.1.9.
Connect voltmeter to TP33. 
4.1.10. 
Check the voltage to be within 5V +/-0.2V. 
4.2. 
TCXO CONTROL 
4.2.1. 
Connect frequency counter to TP4. 
4.2.2. 
Check the frequency to be within 10.000 000 Hz +/-1 Hz. 
4.3. 
KEYBOARD AND DISPLAY. 
4.3.1. 
Press the keyboard C, the display shows 000000. 
4.3.2. 
Press the keyboard 1 six times. The display shows 111111. 
4.3.3. 
Repeat 4.3.2. for 0.2.3.4 	. 
and 9. 
4.3.4. 
Press the keyboard point. The display shows 99999.0. 
4.3.5. 
Press the keyboard 9. The display shows 99999.9. 
~ 
<, I:'-rn 
-ot <, (") 
o (") 
~ 
Cl) 
4.3.6. 
Check that the illegal frequency lamp is illuminated. 
4.3.7. 
Set the switch on the artificial key in position OFF. 
28 

PERFORMANCE CHECK FOR S1303/04 cont.: 
4.3.8. 
Set the display input switch in position EXT.FRQ.CONTROL. 
4.3.9. 
Check that the display is empty except for the point, and that the EXT.FRQ.CONTROL lamp is illuminated. 
4.3.10. 
Set the switch on the artificial key in position ON. 
4.3.11. 
Check that the display shows 00000.0 
4.3.12. 
Set the display input switch in position 2182 kHz selected. 
4.3.13. 
Check that the display shows 02182.0 
4.3.14. 
Set the display input switch in position keyboard. 
4.4. 
VCO SELECTOR: 
The band se 1 ect output code is controlled. 
4.4.1. 
Set the frequency to 8500.0 kHz. 
4.4.2. 
Check that the diodes on the testbox indicates the code 
ZYXVZ 01010 
where a lil" represents an i 11 umi nated diode. 
4.4.3. 
Set the frequency to 19000.0 kHz. 
4.4.4. 
Check that the diode on the testbox indicates the code. 
ZYXVZ 10101 
where a "I" represents an illuminated diode. 
4.4.5. 
Set the frequency to 26000.0 kHz. 
29 
4.4.6. 
Check that the 2182.0 kHz lamp is alight. 
4.4.7. 
Activate the key switch on the testbox. 
4.4.8. 
Check that the transmitter starts and the simplex relay lamps are alight. 
4.4.9. 
Activate the 22V for dummy switch on the testbox. 
4.1.10.
Check that the PA block lamp on the testbox is alight. 
4.4.11. 
Set the 22V for dummy switch in neutral position. 
4.5. 
HARMONIC FILTER AND VCO. 
Load TP26 with 68 ohm. 

4.5.1. 
Connect frequency counter to TP30. 
4.5.2. 
Connect voltmeter to TP6. Connect voltmeter to TP7. 
4.5.3. 
Go through the frequencies indicated in fi g. 1 and chec k the above mentioned test points. 
• 
4.5.4. 
In the A positions read 4698 kHz. In the B positions read 2699 kHz. 
• 
4.5.5. 
In all positions check that the TP6 voltage is below 3.5V. 
4.5.6. 
In A positions check that the TP7 voltage is 15V +-lV and in B positions check that the TP7 voltage is above 5.0V. 
4.5.7. 
Disconnect the 68 ohm load from TP26. 

4.6. 
STEP RESPONSE. 
4.6.1.
Connect oscilloscope to TP7. 
4.6.2. 
Set the frequency to 2400.9 kHz, short-circuit black/yellow control wire on divider board to ground. Step response is seen on oscilloscope, compare to fig. 2. 
4.6.3. 
Connect oscilloscope to TPS. 
4.6.4. 
Set the frequency to 2400.9 kHz, short-ci rcuit grey control wi re on divider board to ground. Step response is seen on oscilloscope, compare to fig. 3. 
4.7. 
LEVEL CHECK 
4.7.1.  
Connect oscilloscope to TP29 via 1:10 probe. 
4.7.2. 
Check the voltage to be above 1.7Vpp at the frequency 2000.5 kHz. 
4.7.3. 
Connect oscilloscope to TP27 via 1:10 probe. 
4.7.4. 
Check the voltage to be above 1.6Vpp at the frequency 2000.5 kHz. 
4.7.5. 
Connect oscilloscope to TP2S via 1:10 probe. 
4.7.6. 
Check the voltage to be above 2.5Vpp at the frequency 2000.5 kHz. 

r'"\ <, 
r-c:( 
~ <, 
r'"\ o r'"\ .--; 
tfJ 
4.7.7. 
Connect voltmeter to TPS. 
4.7.8. 
Chec k the vo ltage to be with in 6 V to 11V at the frequency 2000.5 kHz. 

4.7.9. 
Check the voltages to be below 14.5V at the frequency 2000.0 kHz. 
4.7.10. 
Check the voltage to be above 4V at the frequency 2000.9 kHz. 
3C 
PERFORMANCE CHECK FOR S1303/04 cont.: 
VCO under test Pos. Freg.select 
L315 	A 	1999.0 
	B 	0000.0 
L313 	A 	3999.0 
	B 	2000.0 
L314 	A 	5999.0 
	B 	4000.0 
L306 	A 	7999.0 
	B 	6000.0 
L304 	A 	9999.0 
	B 	SOOO.O 
L305 	A 	13999.0 
	B 	12000.0 
L309 	A 	17999.0 
	B 	16000.0 
L307 	A 	23999.0 
	B 	22000.0 
L30S 	A 	25999.0 
	B 	24000.0 
Fi g. 1 

PERFORMANCE CHECK FOR S1303/04 cont.: 
4.8. 
MICROPHONE AMPLIFIER. 
4.8.l. 
Connect oscilloscope to TP12. 
4.8.2. 
Set the frequency to 2000.5 kHz and the mode switch to A3J (J3E), connect the tone generator (1000 Hz) to the testbox. 
4.8.3. 
Adjust the tone generator output voltage from a minimum, until the level at TP12 is just constant. This limitation must happen at approx. 1Vpp measured at TP25. 
4.8.4. 
Add 10 dB to tone generator (3.16Vpp) and check that the measured signal is approx. symmetrical clipped. 
4.8.5. 
The attack- and decay time of the microphone amplifier is measured on TP24, connect the oscilloscope to this TP. 
4.8.6. 
By connection and disconnection of the tone generator signal the measured voltage must be as shown on fig. 4a and b , 
31 
4.9. 
OUTPUT LEVEL 
4.9.l. 
Connect oscilloscope to TP21 via 1:10 probe. 
4.9.2. 
Set the frequency to 2000.5 kHz, tune, full power and power level potentiometer fully clockwise. Measure the output voltage to be within 4.2Vpp and 4.8Vpp. 
4.9.3. 
With the tune button activated, control that the tune lamp on the front plate is alight, and that the SIMPLEX RELAY 1 amp on the testbox is alight. 
4.9.4. 
Connect TP24 to ground. 
4.9.5. 
Press the tune button and adjust the power level potentiometer until there is full deflection (8 cm) on the oscilloscope. The output signal is symmetrical clipped. 
4.9.6. 
Disconnect TP24 from ground, the output signa 1 seen on the oscill0scope is 7 cm and the si gna 1 is not clipped. 

4.10. 
POWER REDUCTION . 
4.10.l. 
Connect diode probe to TP21. 
4.10.2. 
Set the frequency to 2.000,0 kHz, A3H (H3E), full power, and activated key, check that the power level potentiometer on the testbox can change the output RF 1 eve 1 between 10 and 13 dB. 
4.10.3. 
With power level potentiometer on the testbox fully clockwise, check the first power reduction step to be between 4 dB and 6 dB below full power, the second step 8 dB, the third step 12 dB to 18 dB and the fourth step 17 dB to 23 dB below full power. 

PERFORMANCE CHECK FOR S1303/04 cont.: 
4.10.4. 
Check that the power reduction lamp is alight when the output power is reduced. 
4.11. 
A3H, A3A, A2H, Al and TELEX. 
4.11.1. 
Connect oscilloscope to TP21 via 1:10 probe. 
4.11.2. 
Select 2000.5 kHz, tune and full power, adjust power level potentiometer until there is full deflection (8 cm) on oscilloscope screen. 
4.11.3. 
Change to A3H without modulation. Check A3H carrier, now seen to be within 4 cm and 5 cm. 
4.11.4. 
Connect tone generator, 1000 Hz and 3Vpp to microphone plug. 
4.11.5. 
Check the output in A3H, A3A, A2H and A3J to be within 7 cm pp. and 8 cm pp. on oscilloscope. 
4.11.6. 
Check the output in Al to be within 5 cm pp and 6.4 cm pp on the osci11oscope. 
4.11.7. 
Sellect 2000.5 kHz and A3J. Connect tone generator, 1500 Hz and 3Vpp to the microphone plug and adjust the output level to full deflection (8 cm) on the osci11oscope screen. Connect tone generator to the artificial key. 
4.11.8. 
Select 2000.5 kHz and telex, and check that the peak amplitude of the output signal is within 7 cm pp and 8 cm pp on the oscilloscope. 
4.11.9. 
Connect pin 3 and pin 8 on IC1001 (mode switch board) and check that the peak amplitude of the output signal is within 5 cm pp and 6 cm pp. 
4.11.10. 
Remove the pi n 3 and pi n 8 connection and press the tune knob for 10 secs. 
4.11.11. 
Check that the peak amplitude of the telex signal again is 7-8 cm pp. 
4.12. 
A2H OSCILLATOR AND DELAY UNIT. 
4.12.1. 
Connect frequency counter to TP32, and check the frequency to be within 455 Hz to 475 Hz in A2H position. 
4.12.2. 
Connect oscilloscope to TP21, and tone generator to the artificial key. Tane generator output: 1500 Hz and 3Vpp. 
4.12.3. 
Select 2000.5 kHz and telex, trig the oscilloscope from the artificial key, and check the output envelope on the oscilloscope with the figure below. 
4.12.4. 
Select 2000.5 kHz, A1 and oscilloscope sensitivity to O.1V/div., adjust power level potentiometer until the steady state level is 8 cm pp on the screen. 
4.12.5. 
Trig the oscilloscope from the artificial key and check the output envelope on the oscilloscope with the 
figure below. 

	32 

PERFORMANCE CHECK FOR S1303/04 cont.: 

4.12.6. 
Trig the oscilloscope on the opposite edge and check the output envelope with the figure below. 

4.12.7. 
Change sweep rate to 2 mS/di v. and check the +22V from delay as indicated on the figure below. 
16.	
4.12.8. 
Connect the oscilloscope to TP35 and trig the oscilloscope from the artificial key. Load TP35 with 1 kohm. 
33 
4.12.9. 
Check that the RX block pulse stays at +22V for a time period between 6 msecs and 20 msecs af ter key-off. 
4.13. 
BANDPASS FILTER UNIT 

Lowpass filters and bandpass filters are checked as described in adjustment procedure 5.11. 
4.14. 
ALARM TONE GENERATOR 
4.14.l. 
Connect oscilloscope to TP22 via 1:10 probe. 
4.14.2. 
Activate the al arm test button. On the oscilloscope a 5.0Vpp square wave is seen. Control that the frequency is 2.0 Hz (500 msecs). 
4.14.3. 
Connect oscilloscope to TP11 via a 1:10 probe. 
4.14.4. 
Activate the alarm test button. Contro 1 tha t a voltage of 22V DC with a 1.2Vpp square wave is seen on the scope. 
4.14,5. 
Connect the counter to TP11 via 1:10 probe. 
4.14.6. 
Connect TP22 to ground (pi n 8 of IC1308). Check the frequency to be 1300 Hz +-10 Hz. 
4.14.7. 
Connect TP22 to +5V DC (pi n 14 of IC1304). Check the frequency to be 2200 Hz +-15 Hz. 

Under the performance check that the alarm tone generator will stop after 45 secs. For restart, release test alarm push button and activate it again. 

PERFORMANCE CHECK FOR S1303/04 cant.: 
4.15. 
FREQUENCY RESPONSE 
Frequency responses from LF input (on testbox) to the RF output is measured as described in adjustment procedure 5.9.1. and 5.9.3. 
4.16. DISTRESS 
4.16.l. 
Connect the oscilloscope to TP21. Switch the frequency to 2182.0 kHz. 
4.16.2. 
Press alarm and test alarm at the same time. 
4.16.3. 
The distress signal can now be seen on the oscilloscope. 
The time from start of alarm signal until it automatically disappears is checked by a watch to be approx. 45 secs. Control that the modulation index is at least 0.7. 
4.16.4. 
When the alarm tone signa 1 is seen on the oscilloscope press the tune button and check that the peak to peak voltage now seen is approx. the same as that of the alarm tone signal. 
4.17. 
FREQUENCY SELECTION 
4.17.l. 
Change the proms IC702, IC2114 and IC2115 from the test pram to the pram supplied with the exciter. 
4.17.2. 
Press the A3H (H3E) button and disconnect the AF tone generator on the test box. 
4.17.3. 
Connect the frequency counter to TP21 via a 1:10 probe. 
4.17.4. 
With the frequencies shown below control the frequencies. 
FREQ. (MHz)    2888.8   4444.4 12300.0 22200.0 25000.0 
 5999.0 16799.0 
4.17.5. 
Connect the oscilloscope to TP21 and switch the DISPLAY INPUT SWITCH to position 2182 selected. 
4.17.6. 
Control that the diode 2182 kHz selected is alight. 
4.17.7. 
Turn the POWER REDUCTION button counter clockwise and control by means of the oscilloscope that the power is not reduced and that the power reduction lamp is not alight. 
4.17.8. 
Set the DISPLAY INPUT SWITCH to position keyboard. Check that the illegal frequency lamp is alight. 
4.17.9. 
Set the frequency to 4125.0 kHz and check that the illegal frequency lamp is not alight. 
4.18. 
FREQUENCY CHECK (only S1304) 
4.18.l. 
Reconnect the plugs from the frequency, check unit on the frequency control unit. 
4.18.2. 
Key-in the frequencies of the frequency table placed beside the short wave set or in the operating instruction manual. 
r-, <, r-c 
~ 
o h r-l 
V1 
4.18.3. 
Check that the illegal frequency lamp is not alight when an allowed frequency is keyed-in. 
34 

5. ADJUSTMENT PROCEDURE FOR S1303/04 
Before executing adjustment procedure the exciter must be connected to the power supplies +22V, +8V and -45V via the testbox S1303/04 and the artificial key for S1303/04. These two test boxes are connected in series. The RF output connector must be loaded with 50 ohm. 
It is necessary to Change the PROMIs IC702, IC2114, IC2115 with the supplied test points. 
The following adjus tment steps start with the selected frequency and the selected modulation mode of the exciter e.g. Al tune. 
The trimming cores are factory sealed. In order to break the seal - use normal cellulose thinner. 
5.1.
OC ADJUSTMENTS. 
5.1.1. 
Connect voltmeter to TP1. 
5.1.2. 
Adjust R902 to +18V. 
5.1.3. 
Connect voltmeter to JP2. 
5.1.4. 
Adjust R209 to -18V. 
5.1.5. 
Connect voltmeter between TP1 and TP3. 
5.1.6. 
Adjust R214 to less than 100 mV. 
5.2 
TCXO 
5.2.1.
Connect frequency counter to TP4. 
5.2.2. 
Adjust Rl12 to 10 000 000 +/-1 Hz. 
5.3. 
VCO OSCILLATOR. 
5.3.1. 
Disconnect the VCO output coaxial cable and connect a 50ohm resistor to the VCO output terminal (VCO OUT). 
35 
5.3.2. 
Connect a voltmeter to VCO CONTROL IN. 
5.3.3. 
Turn the core of each coil to the level of the coil former. 
5.3.4. 
Select each VCO coil unit by keying in the frequencies listed below. 
5.3.5. 
The VCO coil unit is adjusted by turning the core of the selected coil until voltage reaches the value -15.0V +/-lV. 
5.3.6. 
Connect an oscilloscope to the 50 ohm resistor at the VCO output terminals. 
5.3.7. 
Key-in the frequencies listed below and control that the oscilloscope voltage is 1.5Vpp +/-0.4Vpp and control that the voltmeter shows -8 +/-2V OC. 
fTX (MHz) 	VCO coil 
	1.999 	L315 
	3.999 	L313 
	5.999 	L314 
	7.999 	L306 
	9.999 	L304 
	13.999 	L305 
	17.999 	L309 
	23.999 	L307 
	25.999 	L308 

5.4. 
HARMONIC FILTERS. 
5.4.1. 
Load TP26 with 68 ohm. 
5.4.2. 
Connect voltmeter to TP7. 
5.4.3. 
Turn core of each coil to the level of the coil former. 
5.4.4. 
Select each keying-in the in 5.4.11. 
5.4.4. 
Select each harmonic filter in 5.4.11. 
by keying in the frequencies specified 
5.4.5. 
The harmonic filters are adjusted by turning the core of the selected coil1 until the voltage reaches the value -15V +/-lV. 
5.4.6. 
Connect voltmeter to TP6. 
5.4.7. 
Execute 5.4.11. and adjust each selected coil to minimum voltage (AGC-voltage). This voltage must be 1.5V +/-0.5V. 
5.4.S. 
Connect voltmeter to TP7. 
5.4.9. 
Execute 5.4.11. and check that the voltage is -15V +/-lV. 
5.5. 
MICROPHONE AMPLIFIER. 
5.5.1. 
2000.5 kHz, A3J (J3E). Connect tone generator, 1000 Hz and 1Vpp measured on TP25. 
5.5.2. 
Connect oscilloscope to TP12. 
5.5.3. 
Turn R1201 fully counter clockwise and then clockwise until the measured level is just constant. 
5.5.4. 
Add 10 dB to tone generator output 1Vpp. 
5.5.5. 
Adjust 	R1224 	for 	symmetrical 
clipping. 
5.5.6. 
Connect oscilloscope to TP13. 
5.5.7. 
Change to tune position. 
5.5.S. 
Adjust R1232 to SO mVpp. 
36 
N <, 
\D « 
-::t <, 
r<'\ o r<'\ ,...., 
(J) 
ADJUSTMENT PROCEDURE FOR S1303/04 cont. : 
fTX (MHz) 	VCO coil 	5.4.10. 
Disconnect 68 ohm load. 
	0.000 	L315 
	2.000 	L313 	5.4.11. 
	4.000 	L314 
	6.000 	L306 	fTX (MHz) Selected harmonic 
	S.OOO 	L304 		filter (MHz) 
	12.000 	L305 
	16.000 	L309 	1. 999 	S 	L403 
	22.000 	L307 	3.999 	10 	L402 
	24.000 	L308 	5.999 	12 	L401 
			7.999 	14 	L404 
	5.3.S. 		9.999 	16 	L405 
Disconnect the 50 ohm resistor at 	13.999 	20 	L406 
the VCO output terminals. 	17.999 	24 	L407 
Connect the VCO output coaxial cable 	23.999 	30 	L409 
aga in. 	25.999 	32 	L408 

ADJUSTMENT PROCEDURE FOR S1303/04 cont. : 
5.6. 
SIGNAL PATH. 
5.6.l. 
2000.5 kHz, A3J (J3E), handset key on, with no input from tone generator. Connect oscilloscope to TP9 via 1:10 probe. 
5.6.2. 
Adjust U01, U101, and U102 for max. 
5.6.3. 
Adjust R1125 and Cl123 for min. This adjustment must be repeated until the measured signal is almost a 1.2 MHz Sine. 
5.6.4. 
Turn power level potentiometer fully clockwise. 
5.6.5. 
Connect oscilloscope to TP23 via 1: 10 probe. 
5.6.6. 
Adjust R1625 to min. 
5.6.7. 
2000.5 kHz, tune full power. Connect oscilloscope to TP21 via 1:10 probe. If the signal is clipped reduce output until it is undistorted. 
5.6.8. 
Adjust U106, L601, U603 and U604 for max. 
5.6.9. 
Connect oscilloscope to TP6 via 1:10 probe. 
5.6.10. 
Turn R1149 fully clockwise. 
5.6.1l. 
Adjust R1158 until there is full deflection (8 cm) on oscilloscope screen. The signal seen on the oscilloscope is symmetrical clipped. 
5.6.12. 
Adjust R1149 until the deflection seen on the oscilloscope is 7 cm. The signal seen is not clipped. 
37 
5.6.13. 
Connect oscilloscope to TP11 via 1:10 probe and set the output to max. by turning the power level meter fully clockwise. 
5.6.14. 
Adjust R1158 to 350 mVpp. 
5.6.15. 
Connect oscilloscope to TP20 via 1:10 probe. 
5.6.16. 
Adjust R1631 to 2.8 Vpp. 
5.6.17. 
Connect oscilloscope to TP21 via 1:10 probe. 
5.7. 
A3H AND A2H LEVEL. 
5.7.l. 
Connect frequency counter to TP32. 
5.7.2. 
2000.5 kHz, A2H. Adjust L1801 to 465 Hz +/-5 Hz. 
5.7.3. 
2000.5 kHz, tune and full power. Connect oscilloscope to TP21 via 1:10 probe. 
5.6.18. 
Adjust R1534 to 4.5 Vpp. 
5.6.19. (USA version only) 
Connect oscilloscope to TP20 via 1:10 probe. 
5.6.20. (USA version only) Adjust R1631 to 1.4 Vpp. 
5.6.21. (USA version only) 
Connect oscilloscope to TP21 via 1:10 probe. 
5.6.22. (USA version only) Adjust R1534 to 4.5 Vpp. 
5.7.4. 
Adjust power level potentiometer to full screen (8 cm). 

ADJUSTMENT PROCEDURE FOR S1303/04 cont. : 
5.7.5. 
Change to A3H without modulation. Adjust the A3H carri er now seen to 4.4 cm with R1109. 
5.7.6. 
Change to A2H and adjust R1806 until the A2H signal now seen is 8 cm pp. 
5.7.7. 
Connect oscilloscope to TP35 and trig the oscilloscope from the artificial key and load TP35 with 1 kohm. 
5.7.8. 
2000.5 kHz, Al. Adjust the voltage now seen to be +22V for a time period of 10 mS +/-1 mS on the potentiometer R1819. 
5.8. 
ALARM GENERATOR. 
No adjustments to be executed. For a performance check execute point 4.11 and 4.13. 
The following filter adjustments must only be carried out when some repair is do ne around a filter. 
5.9. 
600 kHz SSB FILTER. 
5.9.1. 
2000.5 kllz , tune. Connect oscillo-scope to TP21 via 1:10 probe. 
5.9.2. 
Adjust L1104 and L1105 for max. 
5.9.3. 
Control of filter response is carried out i n mode A3J (J3E), with tone generator connected to the test box, output 3Vpp measured on TP25. 
Frequency response is measured wi th diode probe on TP21. Max. permissible ripple is 2 dB in the frequency range 500 kHz - 2500 Hz, -6 dB frequencies are approx. 350 Hz and 2700 Hz. 
5.10. 
10.7 MHz FILTER. 
5.10.1. 
598.0 kHz, A3H (H3E) without modulation. Disconnect inner core of coaxial cable W1/6-16. 1 
5.10.2. 
Connect point 1 to point 5 on mixerboard with an external wire. 
5.10.3. 
Connect oscilloscope to TP19 via 1:10 probe. 
5.10.4. 
Adjust L1601 and L1602 to max. 
5.10.5. 
Ad just slightlY Ll601 and/or Ll602 until the amplitude is the same within +/-0.25 dB at the frequencies 595.0 kHz, 598.0 kHz and 601.0 kHz. 
5.10.6. 
Remove wire between 1 and 5 , reconnect W1/6-16. 
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5.10.7. 
2000.5 kHz, tune. Turn the power level potentiometer fully clockwise. Go through 5.6.7. to 5.6.8. without the adjustment of Ll106 and L601, and go through 5.6.13. - 5.6.22. 
5.11. 
LOWPASS FILTER AND BANDPASS FILTER UNIT. 
5.11.1. 
4500.0 kHz, A3H (H3E) without modulation. Disconnect the 50 ohm load at the RF output termi na 1 and connect an oscilloscope to TP21 via a 1:1 probe. 
5.9.4. 
2000.5 kHz, TUNE. Turn the power level potentiometer fully cloekwise. Go through 5.6.9. - 5.6.22. and 5.7.1. - 5.7.3. 
38 

ADJUSTMENT PROCEDURE FOR S1303/04 cont. : 
5.11.2. 
Disconnect the inner core of coaxial cable W1/15-16. Connect the inner core of coaxial cable W1/3-16 (the VCO-signal) to the point where the inner core W1/15-16 was connected. 
5.11.3. 
With max. sensitivity on the oscilloscope adjust U501 to min. output voltage. 
5.11.4. 
Set the frequency to 9999.9 kHz. 
5.11.5. 
Adjust L1502 to min. output voltage. 
5.11.6. 
Reconnect the wires W1/15-16 and W1/3-16. 
5.11.7. 
6600.0 kHz, A3H (H3E) without modulation. 
5.11.8. 
Adjust L1503 to max. output voltage. 
5.11.9. 
9000.0 kHz, A3H (H3E) without modulation. 
5.11.10. 
Adjust L1504 to max. output voltage. 
5.11.11. 
Reconnect the 50 ohm load at the RF output terminal. 
5.11.12 
1600.0 kHz, A3H (H3E) without modulation, connect diode probe to TP21. 
39 
5.11.14. 
8500.0 kHz, A3H (H3E) without modulation. Control that the output voltage is between -1 dB and +0.5 dB with reference to the adjustment in 5.11.13. 
5.11.15. 
A3H (H3E) without modulation. 
5.11.16. 
Set the frequency to A = 12330.0 kHz, B = 12491.0 kHz and C = 12652.0 kHz and execute 5.11.20. 
5.11.17. 
Set the frequency to A = 16460.0 kHz, B = 16660.0 kHz and C = 16859 kHz, and execute 5.11.20. 
5.11.18. 
Set the frequency to A = 22000.0 kHz, B = 22156.0 kHz and C = 22311.0 kHz, and execute 5.11.20. 
5.11.19. 
Set the frequency to A = 25070.0 kHz, B = 25090.0 kHz and C = 25110.0 kHz, and execute 5.11.20. 
5.11. 20. 
The frequencies for the bandpass filter adjustments is chosen so that the center frequency is in position B, and band limits in position A and C. 
Every single bandpass filter must be adjusted to max. output. The output must be withi n +-0.25 dB i n A and C relative to Band the deflecti on on the center frequency pos ition B must be between -1.0 dB and +0.5 dB wi th reference to the adjustment in 5.11.13. 
5.11.21. 
1A TUNE.
Turn the power level potentiometer fully clockwise. Go through 5.6.15. - 5.6.22. 
5.12. 
OUTPUT FILTER. 
5.11.13. 
Adjust power 1 eve 1 potentiometer until 0.775V, corresponding to 0 dB on the decibel scale, is attained. 
Set the frequency to 1800.0, 2400.0, 4299.0 and 6600.0 kHz and control that the output difference does not exceed 0.6 dB. 
5.12.1. 
0000.0 kHz, A3H (H3E) without modulation. Connect oscilloscope to TP21 via 1:1 probe (wire). 

ADJUSTMENT PROCEDURE FOR S1303/04 cont. : 
5.12.2. 
Disconnect the inner core of coaxia1 cab1e 2 W1/15-16. Connect the inner core of coaxia1 cab1e 5 W1/316 (the VCO signa1) to the point where the inner core 2 W1/16-15 was connected. 
5.12.3. 
Connect the 6 brown/b1ack wire to the 4 red/black wire on the band filter board. 
5.12.4. 
Turn the potentiometer R1534 fu11y counter c1ockwise. 
5.12.5. 
Adjust L1404, L1403 and L1401 to min. output voltage. This adjustment must be repeated unti1 the measured signa1 is a1most a 21.4· MHz sine signa1. 
5.12.6. 
Reconnect the wires of point 5.12.2. - 5.12.3. at their proper p1ace. 
5.12.7. 
2000.5 kHz, TUNE. Turn the power level potentiometer fu11y c1ockwise. Go through 5.6.17. - 5.6.22. 
5.13. 
VCO FILTER (on1y in USA). 
5.13.l. 
13.999,0 kHz, A3J (J3E). Connect oscilloscope to the inner core of coa xial cab1e 5 W1/3-16 (the VCO input to mixer unit). 
5.13.2. 
Disconnect the wires connected to the 6 MHz LP and 9 MHz LP on the VCO filter unit and connect the 6 MHz LP terminal to +18V DC. 
5.13.3. 
Adjust L2204 to minimum output. 
5.13.4. 
Set the frequency to 23300.0 kHz. 
5.13.5. 
Adjust L2202 to minimum output. 
5.13.6. 
Set the frequencies to 1600.0 kHz and 8500.0 kHz and control that the VCO signa1 is not attenuated through the VCO filter. 
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5.13.7. 
Reconnect the wires of point 5.13.2. at their proper place. 
40 

6. NECESSARY ADJUSTMENTS AFTER REPAIR FOR S1303/04 
In the following paragraphs is referred to the necessary adjustment - and performance check paragraphs in chapter 4 and 5. 
6.1. 
DIVIDER UNIT 
Execute 4.1.7. - 4.1.18, 5.2. and adjust U01 as described in 5.6.1. and 5.6.2. Check 4.6., 4.9., 4.16. and 4.17.1. - 4.17.4. 
6.2. 
LOOP 1 FILTER & + -18V POWER SUPPLY Execute 5.1. 
Check 4.5., 4.6.1. and 4.6.2. 
6.3. 
VCO UNIT OR LOOP 1 MIXER 
Execute 5.3. 
Check 4.5., 4.6.1. - 4.6.2. and 4.17.1. - 4.17.4. 
6.4. 
HARMON IC FI LTER 
Execute 5.4. 
Check 4.5. and 4.17.1. - 4.17.4. 
6.5. 
VCXO AND LOOP 2 FILTER 
Execute 5.6.7. - 5.6.8. without adjusting L1106, L1603 and L1604. Execute 5.6.15. - 5.6.22. 
Check 4.6.3. - 4.6.4. 
Check 4.7.5. - 4.7.10. 
6.6. 
VCO SELECTOR 
Check 4.4. and 4.17.1. - 4.17.4. 
6.7. 
FILTER BOARD 
Execute 5.1.1., 5.1.2., 5.1.5. and 5.1.6. 

41 
6.8. 
MODE SWITCH 
Perform a FUNCTION CHECK 7. 
6.9. 
SSB GENERATOR 
Execute 5.6. without adjusting L101, L601, L1603 and L1604. 
Execute 5.7. 
6.10. 
MICROPHONE AMPLIFIER 
Execute 5.5., 5.6.9. - 5.6.22. and 5.7. 
Check 4.8. 
6.11. 
ALARM SIGNAL GENERATOR 
Check 4.14. and 4.16. 
6.12. 
OUTPUT FI LTER 
Execute 5.12. 
6.13. 
LP AND BP FILTER 
Execute 5.11. and 5.6.15. - 5.6.22. Check 4.17.1. - 4.17.4. 
6.14. MIXER UNIT 
Execute 5.6.4. - 5.6.22. without adjusting L1106 and L601. 
6.15. 
A2H, OSCILLATOR AND DELAY UNIT
Execute 5.7. without adjusting Lll09. 

NECESSARY ADJUSTMENTS AFTER REPAIR FOR S1303/04 cont.: 
6.16. 
FREQUENCY CONTROL 
Check 4.1.9. - 4.1.10, 4.3. and 4.17. and perform a FUNCTION CHECK 7. 
6.17. 
POWER SWITCH 
Perform a FUNCTION CHECK 7. 
6.18. 
VCO FILTER (only USA version) 
Execute 5.13. and perform a FUNCTION CHECK. 
6.19. KEYBOARD 
Check 4.3. and perform a FUNCTION CHECK 7. 
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6.20 . 
FREQUENCY CHECK 
Check 4.18. and perform a FUNCTION CHECK 7. 
42 

7, FUNCTION CHECK FOR S1303/04 
7.1.1. 
Connect the testbox S1303/04 and the artificial key S1303/04 to the exciter. Connect the power suppl ies and an AF tone generator to the testbox. The RF output connector must be loaded with 50 ohm. 
7.1.2.
Connect the frequency counter to the RF output connector via 1:10 probe.
7.1. 3. 
Set exciter to A3H (H3E) full power, power level potentiometer on testbox fully clockwise and no modulation. Set the handset key placed on the testbox in position ON. 
7.1. 4. 
Measure the RF output carrier frequency one in each band but in the CT band one frequency below and one frequency above 2 MHz. 
Compare the measured frequencies to the frequency table, placed beside the short wave set or in the operating instruction manual. 
The frequency accuracy must be within 1.0 ppm. 
7.2.1., Connect a diode probe to the RF output connector. 
7.2.2. 
Change to TUNE position and set the handset key on the testbox in off position. 
7.2.3. 
Go through the above mentioned channels and check the RF output voltage to be 3.7V +-0.3V. 
7.2.4. 
In tune position the tune lamp must be alight. The transmitter start and simplex relay lamp on the testbox must be alight. 
7.2.5. 
Check that the power level potentiometer on the testbox has a control range of approx. 12 dB. 
43 
7.2.6. 
Change to A3H (H3E). 
With the power level potentiometer on the testbox fully clockwise, set the handset key on the testbox in ON position. 
Check the first power reductionstep to be between 4 dB and 6 dB below full power, the second step 8 dB to 12 dB, the third step 12 dB to 18 dB and the fourth step 17 dB to 23 dB below full power. 
7.2.7. 
Check that the power reduced lamp is alight when the power is reduced. 
7.2.8. 
Check that the power reduced switch is disabled when tune is activated. 
7.3.1. 
Change to A3J (J3E). Choose a channel in the CT band. 
7.3.2. 
5upply 1500 Hz and 3.16V RMS to the AF input plug on the testbox S1303/ 51304. 
7.3.3. 
Adjust the power level potentiometer on the testbox unti 1 the meter deflection (diode probe connected to the RF output) -j s 2. 45V corresponding to 0.0 dB, 
7.3.4. 
Change the AF tone genera tor frequency between 500 Hz and 2500 Hz, and check that the output amplitude ripple is below 2 dB. 
Check that -6 dB frequencies are approx. 300 Hz and 2700 Hz. 
7.3.5. 
Set AF tone generator to 1500 Hz. 
7.3.6. 
Disconnect the diode probe and connect the oscilloscope to the RF output connector. 
7.3.7. 
Change to tune position. 

FUNCTION CHECK FOR S1303/04 cont.: 
7.3.8. 
Adjust the power level potentiometer on the testbox until full deflection is seen on the oscilloscope screen (8 cm pp.). 
7.3.9. 
Chec ktha t the amplitude is with in 7 cm pp. and 8 cm pp. in the positions A3J (J3E), A3H (H3E) and A3A ( R3E ) . 
7.3.10. 
Supply 1500 Hz and 3.16V RMS to the AF input connector on the artificial key S1303/04. 
7.3.1l. 
Check that the peak amplitude is within 7 cm pp. and 8 cm pp. in the positions TELEX and A2H. It can be necessary to activate the tune button a short moment. 
7.3.12. 
Check that the peak amplitude is within 5 cm pp. and 6 cm pp , in the position Al. 
7.4.1. 
Set the display input switch in position 2182 kHz selected . 
7.4.2. 
Press SEND ALARM and TEST ALARM at the same time. The distres s signal can now be se en on the oscilloscope. The time from start of alarm signal until it automatically disappears must be 45 secs. 
7.4.3. 
Check that the power reduced switch is disabled under alarm transmission. 
7.4.4. 
Check that the 2182 kHz selected 1 amp i s a 1 i ght when the frequency selector is in position 1. 
7.5.l. 
Set the data/clock switch on the artificial key in position OFF. 
7.5.2. 
Set the display input switch in position EXT.FREQ.CONTROL. 
7.5.3. 
Check that the display is blank. 
7.5.4. 
Set the data/clock switch on the artificial key in ON position. 
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7.5.5. 
Check that the display is filled with zero-es. 
7.6.l. 
Check that the dimmer switch is working. 
44 

MICROTELEPHONE INSTALLATION S1300 
It is possible on request to get a special two microphone installation a~ described on the scematic diagram below. 
NORMAL INSTALLATION WITH ONE MICROTELEPHONE 

SPECIAL INSTALLATION WITH TWO MICROTELEPHONES Microtelephone one with preference. 

SPECIAL INSTALLATION WITH 3 MICROTELEPHONES 

80r7011 VIEW 
8C639 8C6"0 
BFW 17A 
Be 328-25 Be 338 
Be 5'17 Bc51t8 A.B,C Be 556 A. 
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U13053 

BF 199. BF't9't 
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(900) (200) (200) (100) (100) (400) (200) (600) (1100) 
(1300) (1200) (1200) (1100) (1100) (1100) (1600) (1600) (1600) (1500) (1400) (1300) (1600) (1200) (1200) (400) (600) (600) (300) (100) (100 (1800) (2100) 
(1800) 

TEST POINT LOCATIONS S1303/04 
TP: 
MODULE 
1.	Filter module: +18V DC out 
2.	Loop 1 filter & +-18V supply unit: -18V out 
3.	Loop 1 filter & +-18V supply unit: +18V out 
4.	Divider unit: l0 MHz TCXO out 
5.	Divider unit: 600 kHz output signal 
6.	Harmonie filter: VAGC 
7.	Loop 1 filter & +-18V supply unit: VCO control out 
8.	VCXO and loop 2 filter: Control voltage 
9.	SSB-Generator: DSB signal to LSB filter 
10.	Alarm tone generator: Alarm tone signal out.
12. Microphone amplifier: Amplifier output 
13. Microphone amplifier: AF signal output 
14.	SSB-Generator: 600 kHz carrier amp. 
15.	SSB-GENERATOR: 600 kHz to modulator balance
16.	 SSB-GENERATOR: SSB output signal 
17.	Mixer unit: 10.7 MHz filter output 
18.	Mixer unit: 10.7 MHz amplifier T1605 Basis
19. Mixer unit: 10.7 MHz 3. mixer input 
20.	Band-filter: Input to output amplifier 
21.	Output filter: RF signal out to PA 
22.	Alarm tone generator: 250 msecs control pulse 
23.	Mixer unit: 10.7 MHz filter input 
24.	Microphone amplifier: Compressor control voltage 
25.	Microphone amplifier: Microphone input 
26.	Harmonie filter: Harmonie filter out to loop 1 mixer 
27.	VCXO and loop 2 filter: loop 2 mixer out 
28.	VCXO and loop 2 filter: 10.0976 MHz out to 2. mixer 
29.	VCO unit: VCO out to 3. mixer 
30.	Divider unit: loop 1 input 2.7 - 4.7 MHz 
31.	Divider unit: +5V input 
32.	 A2H-oscillator and delay unit: A2H oscillator collector
33.	 Frequency control: +5V input 

35. A2H-oscillator and delay unit: RX-block out