Using Logical Port Names With Virtual Instruments

You can specify the same logical port name for two different physical ports used by different virtual instruments.

For example, Virtual instrument A can define MYPORT as the logical name of physical PORT2: 

ROUTe:RF:PORT:DEFine 'MYPORT','PORT2'

Virtual instrument B can also define MYPORT as the logical name for a different physical port, PORT4: 

ROUTe:RF:PORT:DEFine 'MYPORT','PORT4'

Test plans running on instrument A and instrument B can both refer to MYPORT, but the physical port referenced will differ depending on the virtual instrument. This allows you to create test plans that are completely identical without having to know the actual physical connections from the instrument to the DUT. Physical connections from the DUT to the instrument can be managed by the test executive.


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  1. Virtual Instrument A: PORT2 = MYPORT
  2. Virtual Instrument B: PORT4 = MYPORT
Note You cannot assign broadcast ports a logical port name. The broadcast ports break the boundaries of the virtual instrument, as the intention with the broadcast port is to send the same signal to multiple DUTs in parallel.