Bird Variable RF Signal Samplers
Models 4273 and 4275 are wide range adjustable Thruline® RF Couplers for signal observation on a scope or frequency counter input. The output signal produced at the BNC output connector is an attenuated, unrectified signal. They offer very low insertion VSWR across their frequency range and insertion loss is less than 0.2 dB. Both couplers have locking devices on their attenuation control.