[Elecraft] hp 8640 signal generator

I have a nice 8640, which is an excellent signal generator. However, I'm interested in sweeping filters with it. Does anyone know if there is a way to get it to sweep, or are we stuck with manual tuning? Thanks and 73 Bob N6WG ___ Elecraft mailing list

Re: [Elecraft] hp 8640 signal generator

For narrow band sweeping (depends on the frequency range, couple hundred KHz at max) you can use the 8620B's FM mode. Put the sweep generator into the FM external input, and also onto the X axis of your 'scope. Keep the modulating frequency low. Does not have to be a linear ramp either, sine

Re: [Elecraft] hp 8640 signal generator

Robert - Try using a low-frequency AC signal, as from a function generator, and DC couple it to the 8640B FM modulator input. Depending on how much sweep you need, I think this will work. I am pretty sure the 8640B FM section will respond to DC. If you have a function generator, and it