It seems that only the audio part was FM and only on later models.
It seems that only the audio part was FM and only on later models.
But just a few percent (at best) of peak is a little ridiculous don't ya think? Especially with todays highly compressed dynamic range. I wonder just what the maximum voltage available is, just what the wall wart rated power is.
Both NTSC and PAL VHS recorders separated luminance from chrominance, since there was no way to main the critical phase relationship of the chroma signal as required by both NTSC and PAL.
The chroma signals are frequency modulated at low frequency (1 MHz) subcarriers, while the luminance is modulated into the 5-10 MHz (to gain some signal to noise ratio), before feeding into the helical scan heads.
Originally and for compatibility, the audio was recorded on longitudinal track(s) on the side of the track. The HiFi recorded the FM modulated audio using helical scan, as the video.
Some of us still have parts. I also have a 70 MHz microwave IF link analyzer and a Microdyne C-band test set for testing and analyizing C-band equipment.
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