Remote Control via RS232

Question

I want to remote-control my analyzer with LabWindows via RS232. Can you tell me how to proceed because all my trials were in vain. Remote control is successful with GPIB, but I prefer to use RS232.

Answer

There can be some problems with remote control via RS232:

1) Settings in the analyzer - SETUP => GENERA SETUP => COM INTERFACE

- The OWNER must be INSTRUMENT. If it is OS, you're not able to remote-control

the FSP.

- Check the baud rate, parity bit, data bits and the handshake against the

settings of your PC/LabWindowsCVI program.

2) Settings on the PC

- Programs that are running in the background of the PC (firewalls,

anti-virus, printer server, etc) sometimes interfere with remote control.

- Check the baud rate, parity bit, data bits and the handshake against the

settings of your PC/LabWindowsCVI program.

3) The cable

- You need a double-crossed cable, i.e. a null modem cable.

- Check the cable for defects.

4) The LabWindows/CVI program

- First, you have to initialize the RS232 port as in and out port by using exactly

the same settings for the COM INTERFACE as on the FSP.

Then, try to send '*IDN?' to the FSP using a HYPER TERMINAL and

check in this way if your PC and the FSP can communicate.

Thank you.

Your request was successfully sent!

We will get in touch with you soon.

Your Rohde & Schwarz Team

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