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DI503J Triple DI and Re-Amp / Re: Extremely low output
« on: May 13, 2024, 06:13:10 PM »
You can try to send a strong test signal (sine 1VAC) at the instrument input and check you can measure it
- on TP1 (against 0V) at the same value,
- between pins 2 & 3 of U3, attenuated to 80mVAC,
- on TP3 (against 0V) after preamp, level depending on preamp gain.
- on TP1 (against 0V) at the same value,
- between pins 2 & 3 of U3, attenuated to 80mVAC,
- on TP3 (against 0V) after preamp, level depending on preamp gain.