The PDF-200 from RF Bay is a RF Detector with Frequency 5 to 25 MHz, Max Input Power -3 to 17 dBm, Supply Voltage 9 to 15 V, Current 20 to 40 mA, VSWR Input 1.20:1, 2.00:1. Tags: Module with Connectors, Phase Detector. More details for PDF-200 can be seen below.