Author Topic: HP 3311A Function Generator - Low Amplitude at above 4k  (Read 1569 times)

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Offline jonese

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  • Country: ca
HP 3311A Function Generator - Low Amplitude at above 4k
« on: June 26, 2013, 11:52:53 pm »
I have an old HP 3311A in pretty good condition cosmetically that has a problem where the amplitude slowly diminishes to zero starting around 4 KHz, no matter what waveform is selected.  The Pulse Output is fine, it holds up across frequencies (btw there is quite a bit of ringing).  The problem persists across multiple range selectors.

Looking at the manual troublshooting guide, they suggest it's the output amplifier is the issue and references Schematic No. 1.  Trouble is, all electronic copies of the manual are illegible in respect to section 7 that contains the troubleshooting tree and schematics.

Anyone know of the decent scan of section 7?

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