FAQs from Rohde & Schwarz

RFEX: Error while switching tri-axis probe

Question

When a test is started, the RFEX software generates the message

"Error while switching tri-axis probe". This also happens when the test

button in the menu Configuration => Hardware => Switch Unit is used.

Answer

This RFEX function can only check if the correct antenna is connected

and the driver is installed. The switching circuit itself cannot be

read back.

The following prerequisites have to be met to switch the antenna:

1. Antenna factors have been copied to the /RFEX/Data/Antennas directory

(either manually or using the "Copy from Hardlock" function in the RFEX menu

File => Antenna

2. The selected antenna files match the connected antenna. Antenna files are

selected in the menu Configuration => Hardware => Antenna. The details of the

antenna (x-axis is used as reference) can be checked via the menu File =>

Antenna. A data file with "typical example" does not work.

RFEX: Error while switching tri-axis probe

3. The correct switching method is selected.

RFEX: Error while switching tri-axis probe

4. If the USB converter is used, the driver must have been already installed

("USBIO“ directory on the RFEX CD). The converter appears in the

Windows Device Manager as "USB Serial Controller".

5. Switching through analyzers may require an adapter cable to match the

analyzer port (AUX PORT for FSL, USER PORT for e.g. ESPI). Please refer

to the TS-EMF user manual that is copied to \\RFEX\ Manuals\English\

during installation.

RFEX: Error while switching tri-axis probe

FSH4/FSH8 analyzers do not currently support switching through analyzers.

The probe still doesn’t switch?

6. Another reason for the error message could be broken pins on the

control connector (or, if used, on the adapter). In this case, the sensor needs

to be repaired by R&S Service. It is recommended that the sensor be modified

to the latest built standard (with quick release connector plus adaptor).

7. There are some special cases where a sensor has been modified to a later

built standard. In this case, the "Mod" entry may be required in the antenna

file for the x-axis. If it is not present, it can be added using any text editor.

RFEX: Error while switching tri-axis probe

Note:

Even without hardlock, it is possible to check antenna switching with

the test button in the menu Configuration => Hardware => Switch Unit.

For an extended functional test, refer to application note

http://www2.rohde-schwarz.com/file/1SP54_0e.pdf