Reply to "Measuring the TMCC/Legacy track signal strength"

Dale ManquenOGR Forum Member MEMORIALIZED MEMBER

Alex, I don't know how good your 'scope is, but when I view my unloaded Track signal, there is absolutely no distortion of the sinewave, with or without my metering circuit attached. Your waveform has significant even-order distortion without anything attached. That type of distortion won't do much to the FM signal, but it shouldn't be there.

My amplitude on my 'scope is 5V p-p, which is reasonable for a circuit that has a +5V power supply.

I just tested my first batch of five metering circuits, and they all indicate 1.95-1.99V on the meter. The Base signal may be sagging slightly as the Base warms up.

2/4/1411:35 AM

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