Frequency Control of FSW0020 Synthesizer

[chris1300]

I'm following the instructions to control the NI FSW0020 synthesizer frequency using Table 2a for native USB control in the Communications Manual here (http://ni-microwavecomponents.com/manuals/5580510-01.pdf).

However, the only thing that happens is that the default RF output frequency of 10 GHz gets changed to 2.07 GHz (regardless of what frequency I try to change it to) and then won't change to anything else from there (again, regardless of what frequency I put in the control command).

Any help is appreciated.

[chris1300 · Accepted solution]

This has been resolved. I had been including spaces between consecutive bytes in the frequency control command, as per the examples given in the Communications Manual, whereas no spaces should actually be included. Frequency control works as expected now.