Hello Demitry,
Although we do not have a driver for the Rohde & Schwarz SFM, you can submit a request for an instrument driver through our request database at: http://zone.ni.com/idnet97.nsf/instrumentdriverrequest/. Your request may be considered for development. We try to develop instrument drivers according to popularity. Unfortunately, we cannot develop instrument drivers for all the requests we receive.
If you would like to try developing your own instrument driver, we have documentation, model instrument drivers, and driver templates to help you in your development. You can find this information on our web site: http://www.ni.com/devzone/idnet/development.htm.
If there are any further questions, please email instrument.driver@ni.com.
Regards,
Katie Rollo
Instrument Drivers/IVI
National Instruments