The JPF-21F Series from Crane Aerospace & Electronics is a Modulator with RF Frequency 1200 to 2500 MHz, Insertion Loss 13.5 dB, Amplitude Balance 1.3 dB, Current -15 to 15 mA, Phase Balance ±2 to 7 Degree. Tags: Flat Pack. More details for JPF-21F Series can be seen below.