If you are experiencing trouble with your SIM900 Series Instrumentation 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.
SIM900 Series Troubleshooting Guide
Symptom 1 — Can't send commands remotely over GPIB or RS-232 interfaces
Click here to download programming examples for the SIM900 Series.
Upgrade to GPIB — 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 info@thinkSRS.com to place your order for the GPIB interface.
If you are still having trouble your SIM900 Series Instrumentation, it will need to come back to SRS for service. Click here to get an RMA number.