Why does the transmitter keep shutting down under a monitor-control state?

"V" led indicates a VSWR (Voltage Standing Wave Ratio) condition. This occurs when the forward power cannot radiate out of the antenna and is reflected back to the transmitter. Common reasons for this include: coupler not tuned, defective antenna, and filter board not programmed correctly. This value is factory set at 20%. This value can be changed, but it is not recommended to exceed 30%, as high VSWR will damage the equipment.

"N" led indicates a loss of modulation. Common reasons for this include Mode Switch is in "CARR" position, Kwosyn board is defective, or Tone Key board is defective. Try cleaning the board contacts with a #2 pencil eraser.

"C" led indicates the carrier signal and modulation tone is present but there is no Ident code. Common reasons for this include Mode Switch is in the "CONT" position, the Coder Shift Register board is defective, and the Keyer Code board is defective. Try cleaning the board contacts with a #2 pencil eraser.

"P" led indicates a low power output. This is caused when the output power falls below a set value. This is factory set at 50% forward power. Common reasons for this include operating the transmitter at less than 50% forward power. This value can be changed with no damage to the equipment.

A common reason far any of the above conditions is a misaligned monitor control board.

Refer to Section 6, Monitor Control PWB, in the Technical Manual for the setup procedure.