If you are having problems with your SR850 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) Instrument is unresponsive to front-panel button presses
Try a power-up reset. Turn the power off, then while holding the backspace key (left pointing arrow in upper right) down, turn the power back on. After two seconds release the Backspace key. If this doesn't correct the problem the instrument will need to come back to SRS for service. Click here to get an RMA number.
2) Offset and notch filter needs adjustment.
Click here to download the input offset and notch filter adjustment procedures.
If you are still having trouble your SR850, your instrument will need to come back to SRS for service. Click here to get an RMA number.