Hi Al,
I read the timebase as 2ms/div. Those flat top waveforms are 8-10ms long and well defined. They look like IR drops more than ripple. All the signals in mixer section are 30MHz-50MHz range; however, divider section of A3 (same board) has slower signals.?
Even with this waveform on +5V I don't think it is the root cause of missing signal at TP7. ?
Ozan
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On Tue, Oct 10, 2023 at 01:53 PM, @GP53 wrote:
Ozan,
Finally got to the power supply to check ripple. The +15 is 29mV, the -15 is 15mV, and the +5 is 23mV. But the waveform at the +5 on the scope(ac coupled) is troublesome. The waveforms at both 15V looked pretty normal.
