Specifications include, but are not limited to: 2.2.1. Overall control and monitoring functions for the transmitter should be accomplished using simple, easy to use front panel controls and display. 2.2.2. A main system level controller should be responsible for all system level functions, including multiple power block, multiple amplifier cabinet control, remote control interface and VSWR foldback, external interlock, and power raise/lower functions. 2.2.3. Connection to standard parallel remote-control equipment should not require additional interface components, or any transmitter modifications. 2.2.4. Operation status and power levels should be indicated on the transmitter front panel display. 2.2.5. All control functions, including Transmitter “ON” and Transmitter “OFF”, should be accomplished via a tactile user control interface requiring positive depression to actuate. Systems that only use touchscreens shall not be allowed. Faults and interlocks displayed shall include: · Exciter fault · Control system fault · PA Module fault · AC phase loss · VSWR Fault · Cooling fault · PA Power Supply fault · External interlock 2.4.1. All RF amplifier stages should be 100% solid-state. 2.4.2. Transmitter should not contain an intermediate power amplifier. 2.4.3. Amplifiers should be able to attain 600W ATSC power level. 2.4.4. Each RF amplifier should include: · Asymmetrical Doherty modulation technique · Dual Power Supplies · True Hot pluggable modules · Self-contained cooling and protection