various encoders

Stereo Encoder

Nicam Encoder

PCM Encoder

Sound in Sync Encoder

Stereo Encoder

70cm WFM purpose

Characteristics:

Signal overshooting prevention (overshooting max. 10 %)
Low noise and distortion
No adjust (only pilot tone level and output level)
High channel separation and spectral purity in common operation
RDS input and pilot sync. output makes easy to connect any RDS encoder
Microcomputer controlled, hex file provided for free
All parts are easy to buy (incl. crystal)

Supply voltage:	9-16 V (stabilized)
Quiescent supply current (12 V):	34 mA
Audio 19 kHz rejection:	40 dB
Channel separation at 1 kHz:	>55 dB
Subcarrier rejection:	>60 dB
Pilot sampling frequency:	1.843 MHz (19 kHz x 97)
Subcarrier sampling frequency:	1.843 MHz (38 kHz x 48.5)
Pilot sync. output:	TTL
Max. audio input voltage:	5 V pp (1.75 V rms)
Pilot tone level:	linear adjustable 0-0.5 V pp
Output voltage gain:	linear adjustable 0-1.5
Audio input impedance:	2000 ohm
RDS input impedance:	1000 ohm
MPX output impedance:	500 ohm
Pilot sync. output impedance:	10000 ohm
Signal-to-noise ratio:	>70 dB

http://pira.cz/eng/stk2en.htm

Home Made PCB

stereo_Encoder_2

Scope

Nicam Encoder Audio for HIFI Quality

ATV purpose

More Info for Nicam

Pulse-code modulation (PCM) For More HIFI Quality

ATV purpose

Sony PCM 701 ES

PCM without modulation

PCM with modulation

More Info for PCM

Sound in Sync Encoder (Mono)

ATV purpose

sis

Manufacture PYE