8 Feb
2022
8 Feb
'22
2:35 p.m.
On 2/8/2022 5:22 PM, Jon Elson via cctalk wrote:
On 2/8/22 13:34, Douglas Taylor via cctalk wrote:
I was only using a voltmeter to look at it.
I'm going to try 2 different measurements; (1) use a scope to look at
the S&H signal on the AXV11 and see what it does over time, (2) look at
the same S&H signal on the Data Translation board which seems to be
working.
Update on this:? I did put together a battery and
voltage divider to
test the AXV11.? The label on the A/D module says it brings the
output from the multiplexer to one of the external pins.? I was able
to verify that the voltage applied to a couple of the A/D inputs
makes it through the multiplexer when selected using the CSR.? The
next output available is from the Sample and Hold, and this is always
pegged at +12v.? Am I wrong to assume that the sample and hold will
'freeze' its output when the A/D go bit is set?
Well, it will probably only hold the approximate voltage for a few
seconds, but should be long enough to see on a voltmeter.
Jon