SM06 Rev. 4.10

Tac/Com Control Head Manual

3.4.1.2RX (Receive) Volume Control

RX Volume

Controls

The RX volume control is adjusted via the round knob for each radio. Rotating this control fully counter-clockwise to OFF turns the specific radio off. If all controls are OFF, then the control head itself turns off.

3.4.1.3

RX/TX Status Indicator

 

 

RX/TX Status

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Next to the volume controls are bi-colour indicators that display TX (Transmit) status or RX (Receive) status. If that specific radio is keyed to transmit, the LED will be green. If a signal is being received, the LED will be amber.

A radio that is receiving may still not produce any audio, if the tones or DPL codes for that channel do not match the tones or DPL codes set in the control head. If tones are set to ON for a given radio from the status line, then all data (frequency and tone/DPL code) must be correct to hear the receive audio. If tones are OFF, then all incoming transmissions are received. The indicator lights whether the logic is correct for audio or not, to warn the pilot that channel is active with radio traffic of some kind.

If the radio is idle (not receiving or transmitting), the LED will be off. The colour coding used for these functions corresponds to the existing indications used in the FF40, C-62 and C-1000, for pilot familiarity. It is worth noting that these conventions are reversed from vehicular standards, and may be confusing for some emergency services staff used to land mobile equipment. When used with a Wulfsberg radio equipped with a guard channel, both the main and guard RX signal will illuminate the RX LED, unless equipped with separate guard controls.

Jan 4, 2006

Page 3-5

ENG-FORM: 806-0106.DOT

 

CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.