CM13 - Standart Monitoring Control Card

It is a control board which used inside ONAIR brand FM transmitters. 

It has CVS18 current and voltage sampling board connector, LCD display connector, C2 firmware upgrade connector, Uart  connector for remote control unit, 4-pin connector for TMC-12 Modulator Board.

It has built-in PWM and Op-Amp with adjustable gain to obtain 0-11V Driving Control Voltage. A remote on/off pin helps Amplifier Power Supply unit becoming on and off.

It has ADC input connector for Forward power, Reflected power, Amplifier Module 1&2 Power, Input power, heatsink temperature. It also measures  Amplifier Voltage and Driving Control Voltage,

By means of measurements available protections: VSWR, Over Temperature, Over Amplifier Voltage, Over Driving Control Voltage, Over Current, Unbalance.

With the connection of LCD display (2x16 char LCD with 3v3 supply) all parameters can be monitored and controlled.

Remote Control Unit (Raspberry Pi) allows user to control device remotely over IP based web server and cloud (osc.onair.com.tr).

With the help of trimmers on the board it can be calibrated with all kind of transmitters: (FWD, REF, Amplifier Module 1&2, Input Power, Current 1&2 -- Gain of Op-Amp)