AVR-Chat

--- In AVR-Chat@yahoogroups.com, "Doug Locke" <doug@...> wrote:
>
> I wonder if someone could help me with some advice please. I am trying
> to use an AVR microcontroller to monitor an analogue signal. The
> signal is both very low and of high impedance, so initially I wish to
> experiment a little by using a general purpose amplifier between the
> source and the AVR. I have found a HP 465A or a Brookdeal 9452 for not
> too much cash. Does anyone have any experience with either instrument,
> the HP has fixed gains of 20db or 40db while the Brookdeal is
> apparently variable 30-100db so either has suitable gain.
> Thanks for your time.
> Doug Locke.


My ancient 465 'scope has a output on the rear for the A-channel
amplifier, which I have used from time to time for just the purpose
you mention.  It is a very nice feature, and I think some other
'scopes have it as well.