The D5TNF-650/1000-20MHZ-N/N-GRI from K&L Microwave is a Tunable Filter with Frequency 650 MHz to 1 GHz, Bandwidth 56 MHz, Rejection 35 dB @ 20 MHz, Insertion Loss 1 dB, Supply Voltage 28 V. Tags: Benchtop, Digitally Controlled. More details for D5TNF-650/1000-20MHZ-N/N-GRI can be seen below.