Can I Perform Open/Short Test Using 34980A?

Yes. There are two ways you can setup using the 34980A to perform this test. Both methods require you to manually open and close specific relays in order to connect specific test points to the DMM. One way might be more costly than the other depending on your needs. Refer to the below recommendations for more detail.Method #1: Use 2 multiplexer cards and connect one side of the cable/test points to the HI’s of MUX 1 card and the other side of the cable/test points to the HI’s of MUX 2 card. Connect the common LO of MUX 1 card to the common HI of MUX 2 card. When wanting to measure to see if one point is open/short to another point, close the specific relays on the HI’s of both multiplexer cards and close the backplane relay to connect the points to the internal DMM. Here’s a picture example of what it looks like with using 2 x 34923A cards in 1-Wire mode:If you want to test to see if point 1 is shorted with point 7, setup your DMM to measure 2-wire resistance and monitor the DMM as you close channel 001 in MUX1, close channel 001 in MUX2, and close channel 911 in MUX1.Note: Refer to “How do I bypass 34923A protection resistors?” FAQ if you need to bypass the protection resistors on the 34923A card.Method #2: Use 2 general purpose cards and do the same type of connection like in method #1. Here’s a picture example of using 2 x 34938A: