Northern Airborne Technology AMS42 - Manual (Page 63)

SM19 Rev. 4.00 AMS42/44 Dual Channel Audio Controller Manual
Nov 21, 2003 Page 3-9
ENG-FORM: 806-0102.DOT
CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.
3.9.2 Hand Microphone
The hand mic functions without power and will work in emergency or equipment failure
situations. The hand mic normally functions on the left side of the controller but can be
connected to the right side at the time of installation by changing an internal switch.
When the hand mic or transmit PTT switch is activated, the mic involved will be coupled to
the radio (or PA) selected. The TX annunciator will not light when the hand mic is used.
3.10 AMS44 - Transceiver Receive Functions
3.10.1 Receive Selection Switches
The Receive Audio select switches (white switch bats) are ‘center-off’ type with the ‘up’
position selecting the respective navaid receiver audio, and the ‘down’ position selecting
the respective transceiver audio. See section 3.10.3.1 for RX volume control.
3.10.2 Transceiver Selection Examples
In the figure below, the right TX selector is set for transmit and receive operation on the
AUX FM. The Receive function switches are also selected so the right side can monitor
COM1 and FM2 transceivers as well as NAV1 and DME navaids. Note that PA, COM2,
FM1, NAV2, ADF, and MKR are not selected.
Transmit Selector at AUX FM
Receive Switches at
Navaids NAV1 and DME
Receive Switches
monitor COM1 and FM2