The PEM3500 from AWT Global is a PIM Analyzer with TX Frequeny 3.51 to 3.59 GHz, RX Frequency 3.41 to 3.49 GHz, Transmitter Freq. Accuracy ±2 ppm, Tx Carrier Power 20 to 44 dBm, Transmitter Power Accuracy ±0.35 dB. Tags: Bench Top. More details for PEM3500 can be seen below.