Transceivers
The transceiver is a device onboard the aircraft which is tuned into a frequency, and used to transmit and receive radio messages on the selected frequency.
The transceiver is operated by turning the device on using the avionics switch used to power the radio, and in most aircraft the Master Switch must also be ON.
Protect your radio from voltage fluctuations on engine start up by switching it on after the engine is running.
Switch the radio off prior to engine shutdown.
A microphone fitted with a PTT button is used to transmit
and a speaker in the cockpit is used to listen.
This is becoming less common now days as they are being replaced
by the more user friendly headset which is “hands free” when there is a PTT button on control column.
Microphone operation
The boom microphone headset is the normal device for listening and talking on the radio in aviation. The headset microphone and speaker cables plug into the aircraft, and are linked to the communications box and the push to talk buttons.
The headset picks up any transmissions on the monitored frequency, as well as communications between the crew onboard the aircraft.
When the push to talk button is pressed, the microphone becomes ‘active’ or ‘live’ and transmits the modulation onto the frequency monitored.
The handheld microphone is considered a backup onboard the aircraft. It is hard wired into the aircraft’s communications box, and acts similar to the boom microphone except that the microphone has to be held to ones mouth when talking.
The boom microphone headset is the normal device for listening and talking on the radio in aviation. The headset microphone and speaker cables plug into the aircraft, and are linked to the communications box and the push to talk buttons.
The headset picks up any transmissions on the monitored frequency, as well as communications between the crew onboard the aircraft.
When the push to talk button is pressed, the microphone becomes ‘active’ or ‘live’ and transmits the modulation onto the frequency monitored.