The Adacom kit - the Online Menu and making your own Testcard
The Adacom kit :
The Baseband print has 4 inputs :
Input TS1 (next to the 60 mHz xtal) is provided with a FIFO.
Input TS2 (oposite to input TS1) is also provide with a FIFO
Input TS3 (next to input TS2) no FIFO and can be used to connect eg an
Encoder board
Input TS4 (next input TS1) no FIFO and can be used to connect eg an Encoder
board
Inputs TS1 and TS2 can eg be used to
connect a DCF77 module from Conrad Electronics.The pulse output from the module
has,with the help of a 4k7
pull-up resistor,to be connected to SC0(= pin 2 from JP6 = the optional
connector.See the file DATV_BB_V35E_PCB.PDF).
The Encoder board has 4 inputs :
Composite video
S-VHS video
Audio Left
Audio Right
The audio inputs can be used for stereo sound or as separate sound channels (to
be set in the Configuration file).
The IQ modulator/HF Amplifier :
The HF amplfier can be ordered for 13 or 23 or 70 cm or for 13 and 23 cm.
The Supply volltage for the complete
kit can be connected to a plug on the Baseband board.The middle pin = + .
The voltage may vary between 10 and 24 volts.The total current, with 1 Encoder
board connected, is abt 640 mA.The Tx allone takes abt 280 mA.
The selection between the two video
inputs can be done in the Configuration file by using the commands:
video input = composite or
video input = svideo
(For more info see "Installing and changing the Configuration file and
Teletext pages)
On older Encoder boards the Left Audio input is next to the video input.As far
as I know ,that has been changed now so that the Right Audio input is next
to the video input.
To have stable video pictures from video recorders,there is a built-in timebase
corrector enabled.
The Online Menu :
The online menu has been installed
during the installation of the "firmware".With a Terminal program like
Hyperterminal.exe or Term.exe you can change
several parameters on the fly.The setting for these programs are :
comport
com1 (or com2)
bits per second
19200
databits
8
parity
none
stopbits
1
datatransport steering
none
Typing the letter P gives you the
following menu :
f - Set Frequency
F - Toggle FEC mode
I - Toggle Inversion
I - Print Log
P-
Parameters
c - Display counter
S -
Status
C - Capture Status
D - DCF77
Status
A - ADC Status
L - Enable/Disable Logging to Console n -
Active Network Connections
m - Toggle Modulation
p - PLL Lock detect status
X -
Flash
y - Init Encoders from FLASH config
T - Toggle Table Sending
s - Test Encoder SIO
M - Max Periodic Latency
F,f and P are the most
interresting ones for the moment.With P you can see all installed parameters
from the Configuration file.
With F you can change the FEC values in steps from 1/2 to 7/8.
With f you can change the frequency.Typing eg 1255f sets the frequency to
1255 mHz.
Switching the supply voltage on and off will set all parameters back to the ones
in the Configuration file.
Making your own Testcard :
This can be done by using the
program EMPGEnc.exe.Download at http://www.tmpgenc.com
1.Make a 704x576 .bmp file with eg
Paint Shop Pro.This file should be something like 50kb
2.Setting ......................video - stream
type
MPEG-2 video
- size
704x576
- Aspect
Ratio
4:3 display
- Frame Rate
25 fps
- Rate controle
mode
constant bitrate (CBR)
- Bitrate
1159 kbit/sec
- VBV buffersize
(0 automatic)
- Profile and Level
Main Profil&Main
- Video format
PAL
- Encode
mode
interlace
- YUV format
4:2:0
- DC coefficient precision
8 bits
- Motion search precision
normal
Advanced
- video source
type
Interlace
- Field
order
Top field first (field A)
- Source aspect
ratio
4:3 line PAL
- Video arrange
methode
Full screen (keep aspect ratio)
Futher nothing enabled
GOP structure
- 1/5/2/0
Quantize
matrix
- default
Start
The testcard is ready now and will stay in your working directory(same directory
with all your adacom files).
11-03-2003