Hi Everyone, I have found here and on AudioKarma indications that it is possible to set up or test a CD-4 demodulator without a test record but with a signal generator. I am interested in this for the purpose of testing a Sansui QRX 7001 I am planning to buy, I am going to see it tomorrow in person so I need to be able to decide if the CD-4 demodulator is shot or not.
As I understand, the first step would be to feed 30kHz into PHONO and see if the CD-4 beacon lights up. But if this happens what would be the next steps? This should mimic the test record somehow, so if any of the experts here know how to do it I would be very grateful.
Are there similar tricks that one can do with the VarioMatrix/QS/SQ demodulators? I will take with me a couple of SQ records, and some quadrophonic headphones (I don't think I'll have access to 4 speakers there to test it) but if there is an easy trick to test the quad functionality this would be very helpful.
Thanks in advance!
As I understand, the first step would be to feed 30kHz into PHONO and see if the CD-4 beacon lights up. But if this happens what would be the next steps? This should mimic the test record somehow, so if any of the experts here know how to do it I would be very grateful.
Are there similar tricks that one can do with the VarioMatrix/QS/SQ demodulators? I will take with me a couple of SQ records, and some quadrophonic headphones (I don't think I'll have access to 4 speakers there to test it) but if there is an easy trick to test the quad functionality this would be very helpful.
Thanks in advance!