The JPF-21F-2250 SQ from Crane Aerospace & Electronics is a Modulator with RF Frequency 2100 to 2400 MHz, Insertion Loss 13.5 dB, Amplitude Balance 1 dB, Current ±15 mA, Phase Balance ±2 to 6 Degree. Tags: Flat Pack. More details for JPF-21F-2250 SQ can be seen below.