If you are having problems with your FS740 you can call us at
If you wish to try and fix the problem yourself, the user manual may be useful, and the following troubleshooting guide may be helpful too.
1) I want to upgrade my FS740 with the optional OCXO or Rubidium timebase
If you want to upgrade your existing FS740 with the optional OCXO or
Click here to download the installation procedure. You will need to call SRS at
1) I want to use a USB to ethernet adapter for communication
For details on using a USB to ethernet adapter for communication click here.
If you are still having trouble your FS740, it will need to come back to SRS for service. Click here to get an RMA number.