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PNA-X, how to get name of active trace?

Question asked by WDrago on Sep 25, 2014
Latest reply on Sep 25, 2014 by WDrago

I’m trying to capture whatever trace the technician has selected (via front panel) as his Active Trace on the PNA-X.

In order to read a trace via GPIB you have to select it first as follows. In this case the trace is named CH1_S11_1:

":CALCulate1:PARameter:SELect CH1_S11_1"

Now it can be read like this:

// Ask for trace data

// Receive trace data

The trouble is, when the tech chooses a different trace I have no way of knowing what its name is. The appears to be no GPIB/SCPI command to return the name of the Active Trace.

I’ve tried WRITE TEXT ":CALCulate1:PARameter:SELect?, but that just returns the name of whatever trace was previously selected via GPIB, not the front panel.

Any help is appreciated.

Bill Drago
Senior Engineer
L3 Communications / Narda Microwave East
435 Moreland Road
Hauppauge, NY 11788
631-272-5947 /

Edited by: WDrago on Sep 25, 2014 8:21 AM