The hp Model 3750A Attenuator is designed for use in a frequency range from 0 (dc) to 100MHz. Attenuation of 0 to 99dB, 75Ohm impedance, is provided in 1dB steps by the operation of pushbutton switches.

Specification:
Attenuation 0 to 99dB in 1dB steps
Frequency Range 0 to 100MHz
Characteristic Impedance 75 Ohm
Power Rating 250mW (+24dBm)
Return Loss 28dB minimum
Connections BNC 75 Ohm