cashgardner 0 Posted May 27, 2011 At our concierge desk, current smoke-detector camera and microphone is combined and modulated (channel 81) to (3) tvs. On the newer LCD TV, video & voice are heard. On the older tube TVs, only video. NO VOICE. Took the newer LCT TV to the older tube TV locations. Video & Voice are coming through. Took the older tube TVs to the LCD location. ONLY video. May I know why is this happening? Thanks for your aid. Share this post Link to post Share on other sites
Soundy 1 Posted May 27, 2011 How old is the modulator? My initial guess would be that it might be a little off-frequency, enough that the newer PLL tuners in the LCDs can't deal with it. Share this post Link to post Share on other sites
