during strong -signal conditions. ATT (FrontEnd Attenuator)[For more pleasant ... ] [B] [C] keys to provide a "miniature front panel"for ease of operation. There ... MECHANICAL FILTER OPTIONS! R The front panel includes a convenient BNC ... of information is available on the front panel: œWhen you have to be away from ... gBeeph frequency and level control.œFront Panel Key Lock mode (locks Dial only ...