Check the listing for details. GM rf attenuators 3492-64, MAX Atten 80db, Min Step 0.03, 2GHz to 4GHz, tested. Condition: Used. Listed at 65.00 USD. exact item shown, the analyzer traces show freq response out to 3 GHz and different attenuation setttings. tests were run wtih 12VDC (plus and minus) excitation. I put the connection information as the last photo, it would be good for you to read the data sheet before using it to understand how it works. note to me: computer hutch, top shelf behind door the data sheet and information is here: https://www.kratosmed.com/gmcatalog/microwave-attenuators/series-349-and-349h-octave-band-11-bit-digital-pin-diode-attenuators Series 349 and 349H Octave-Band 11 Bit Digital PIN Diode AttenuatorsApplication Notes for Microwave AttenuatorsThe Series 349 and 349H programmable attenuators provide greater than octave-band performance and wide programming flexibility in compact rugged packages. Attenuation ranges up to 80 dB are available with attenuation increments as low as 0.03 dB.Each Series 349 and 349H unit is an integrated assembly of a balanced PIN diode attenuator and a driver circuit. A standard version of the attenuator has a driver circuit consisting of a PROM, a D/A converter and a current-to-voltage converter. See Figure 1. The G10 glitch-free option (see Available Options list below) driver circuit is based on an FPGA and a faster D/A converter designed for smooth glitch-less transitions while switching between attenuation levels. Both versions, the standard and the G10 option, provide a high degree of accuracy and repeatability and preserves the inherent monotonicity of the attenuator. Option G10 is recommended for new designs. SERIES 349 The maximum programmable attenuation range in every band except the 8.0–18.0 GHz frequency range is 80 dB. Attenuators limited in range to 64 dB exhibit switching times less than 500 nsec while the 80 dB units switch in lessthan 2 µsec.