Anthony Gray

That is an entire cable.  I just need a board-mount D-sub.  We switched to the 3721 so I actually needed a 50-pin instead of 78-pin.  I did some searching on my own, and apparently a 50-pin 3-row D-sub is a standard.  I ordered a Harting 09665526612 from DigiKey and it fit.

https://www.digikey.com/en/products/detail/harting/09665526612/4322731?s=N4IgTCBcDaIJwDYEFZliQRggXQL5A
 

The SYS:ERR problem was solved by clearing the "Get instrument status after every command" checkbox in the Communicator->Options menu.  The TSB problem was solved by upgrading the 3706A firmware.

Thanks Andrea!!!

I've done some more experimenting with the Communicator app.  It seems like it is working, but I keep getting error messages, too.  For example, if I enter the command "display.clear()", the front panel shows "Error code -285 TSP syntax error at line 1 unexpected symbol near ':' query unterminated".  The Communicator app also shows ":SYST:ERR? Timeout expired before operation completed."  But after the error messages are shown on the front panel, it clears.  I can also display text using the display.settext("") command, but I also get the same error messages.

I tried the same commands (and others) using the NI MAX VISA Test Panel window.  I get the same error messages and the same behavior.

I tested the 3706A with a different USB cable and on a different PC.  I got exactly the same behavior.  Is there a firmware update process I could try?

This is my first time using Keithley instruments and the TSB, so I'm not familiar with the REM annunciator.  Here's what's on the front panel:

 REM                                   AUTO
 1001      |      ----.----  V
OPN,2    |DCV:R=AUTO  N=1.0000  AD>

When I use the Keithley Communicator to send the "idn?" or "reset()" commands, I get ":SYS:ERR?  Timeout expired before operation completed."

I'm not sure I'm using the application correctly.  I entered the "idn?" command in the lower window, then clicked on the run button in the menu.

It sounds like you are saying that I don't need to use the Configure option, just open the resource.  When I click on Open, I see this in the drop-down list of instruments:

    USB0::0x05ED::0x3706::04019439::INSTR

After selecting this, I get an error saying:

    'Opening Resource' has encountered a problem.

    Failed to open instrument.

    VISA reports:
    Command 'reset()' has timed out waiting for instrument response.

I'm trying to get a 3706A configured and working in TSB.  It's connected via USB.  I ran the "Add Wizard" in the config panel and selected the 3706A.  I get a message saying "You have selected the wrong driver..."  There are other versions of the 3706A (-S, -SNFP, etc.), but I have the 3706-A and that is what I selected.  I found that I could just select "Finish" in the wizard and the instrument would install, but when I try to connect to it I get an error message saying the instrument could not be opened because the reset command timed out.

Image is attached to this post

The simplified schematic for the 3723 switch in single-pole mode shows a HI/LO pair at the top of Bank 1 going to the DMM Input (attached).  There is a second Hi/LO pair on Bank 2 that does not show a connection to anything.  I need to do resistance measurements between any pin on Bank 1 and any pin on Bank 2.  The diagram clearly shows that I can connect any Bank 1 to the HI side of the DMM Input.  I can also connect any Bank 2 pin to the HI output of Bank 2.  But can I measure resistance between Bank 1HI and Bank 2 HI?

I saw the available parts in the datasheet, but the actual part number of the 78-pin connector is not provided.  I assume that a 78-pin D-sub is a standard and that any female 78-pin D-sub connector I purchase will mate with the connector on the 3723, but I would like to have that confirmed.