The GSM900 from AWT Global is a PIM Analyzer with TX Frequeny 935 to 960 MHz, RX Frequency 890 to 915 MHz, Transmitter Freq. Accuracy 200 ppm, Tx Carrier Power +20 to +44 dBm (46 dBm optional), Transmitter Power Accuracy +/- 0.35 dB. Tags: Bench Top. More details for GSM900 can be seen below.