If you are experiencing trouble with your SR570 you can either send your instrument back to SRS for service, or you can try and fix the problem yourself. If you wish to send the instrument back now click here.
If you wish to try and fix the problem yourself, the following troubleshooting guide may help you.
SR570 Troubleshooting Guide
Symptom 1 — Can't send commands remotely over RS-232 interface
Click here to download programming instructions using Hyperterminal.
If you are still having trouble your SR570, it will need to come back to SRS for service. Click here to get an RMA number.