(408) 744-9040
(408) 744-9040
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SIM900 Series Tech Support

If you are having problems with your SIM900 you can call us at (408)744-9040 and speak with an engineer, or email us using our technical support request form. If you wish to send the instrument back to SRS for service click here.

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.

Troubleshooting Guide

1) Can't send commands remotely over GPIB or RS-232 interfaces

Click here to download programming examples for the SIM900 Series.

2) Installing the GPIB interface (opt. 01) in the field

Click here to download the installation procedure. You will need to call SRS at 408-744-9040 or email us at to place your order for the GPIB interface.


If you are still having trouble your SIM900 Series Instrumentation, you will need to send the instrument(s) back to SRS for service. Click here to get an RMA number.

About SRS       Phone: (408) 744-9040