Aeroflex's Software version 3.5.1 for the 3500 Series Hand-held Radio Test Set includes new features to extend the test capabilities of the 3500 Series, such as a new Tracking Generator Option, which allows users to test and align duplexers quickly in the field. The updated software also provides support for the P25 Testing Option. Designed to test key radio parameters, the 3500 Series is the industry leader in hand-held portable testing, with a weight of less than eight pounds. With extensive test capabilities for testing AM, FM and now P25 radios, the 3500 Series provides an integrated power meter, RF frequency counter, AM and FM modulation tests, extensive audio tests including SINAD and Distortion analysis and an optional 1 GHz spectrum analyzer and audio oscilloscope.