Question: Can I control the TTR500A Programmatically?
Answer: Yes, the TTR500A can be controlled Programmatically.
Here is a link to the Programmers manual which contains all the SCPI commands: https://www.tek.com/en/manual/spectrum-analyzer/ttr500-series-ttr500
In order to communicate with the TTR500A VectorVu-PC software needs to be running and connected to the unit. The address to communicate with the TTR500A will be a GPIB8 address which is a virtual GPIB address. This communicates to the VectorVu-PC software which communicates to the TTR500A unit.