The Controller Bypass option allows the operator to control the operation of the amplifier after failure of an operating front panel controller. For those users who want to add additional amplifiers to existing systems, MCL has developed the Parallel Remote Interface option. This self-contained, 1RU translator is available exclusively for the MT3200 and can be configured to provide parallel to serial translation for one or two amplifiers. The Manual Attenuator option allows operators using a Variable Phase Combined (VPC) or Variable Phase Combined Dual Path (VPC2) MT3200 system to easily adjust the output. The Manual Attenuator is located on the front panel of the VPC or VPC2 and provides the operator with the ability to adjust the system gain via the attenuator while maintaining the output phase relationship of the amplifiers.