Stereocoder - Grundig SC5A

 


Grundig's stereo coder SC5A



Multiplex signal


Top view


Rear panel


Bottom view of pcb

THD 100 Hz internal osc
CH1 = green = MPX output
CH2 = yellow = HF output demodulated via R&S CMTA94

THD 1 kHz internal osc
CH1 = green = MPX output
CH2 = yellow = HF output demodulated via R&S CMTA94

THD 5kHz internal osc
CH1 = green = MPX output
CH2 = yellow = HF output demodulated via R&S CMTA94

IMD
CH1 = green = MPX output
CH2 = yellow = HF output demodulated via R&S CMTA94

DFD
CH1 = green = MPX output
CH2 = yellow = HF output demodulated via R&S CMTA94

Frequency response
CH1 = green = MPX output
CH2 = yellow = HF output demodulated via R&S CMTA94

Frequency spectrum MPX output

Frequency spectrum HF output demodulated via R&S CMTA94