The AR-321 consists of six floating attenuators. Input to attenuator 1 can be normalled to 2 or more attenuator inputs to allow multiple use of a single control signal with independent attenuation for each output. This module does not require a back frame or p.c. card assemply, as all necessary circuity is contained on the panel. (No edge connector, no power consumption -look, ma! six hands!)