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replacing Attenuater

Posted by Anthony.R.Guarnera@jpl.nasa.gov on November 12, 2013 at 07:59:19:

I have an older M100 Ella. It has I believe a 50K DAC stepped attenuator. If I replace that with an external attenuator, What do I have to do to the amp besides hooking up the input straight to the Brd. It seems I remember reading something about putting a 50K resistor on the input to grnd. If this is so, and I want to use a 10K attenuator instead of the 50K, would I use a 10K resistor to grnd? Thank you.