JA94-N01A Dual Audio Controller - NVG
Installation and Operating Manual
Rev A
Page 21
3.4
Emergency Operation Mode
The JA94-N01A operates in Emergency Mode automatically (
Auto Emergency Mode
) when the power to the unit is
off, or when the left Transmit Selector Switch is in the EMER position (
Selected Emergency Mode
).
3.4.1
Left User Emergency Mode
In emergency mode, the Left User phone and MIC signals are connected by mechanical relay contacts to the COM2
transceiver and the NAV2 receiver. Left User PTT is routed directly to COM2 PTT and the LEFT USER MIC is routed
to the COM 2 MIC.
The sum of COM 2 RX, NAV 2 RX and Direct Audio 1 (and Direct Audio 2 if configured by ProCS™) is routed to the
LEFT USER PHN output. The LEFT USERPHN is routed to the LEFT CVR output.
3.4.2
Right User Emergency Mode
In emergency mode, the Right User phone and MIC signals are connected by mechanical relay contacts to the COM1
transceiver and the NAV1 receiver. Right User TX PTT is routed directly to COM1 PTT, and the RIGHT USER MIC is
routed to the COM 1 MIC. The Right User is disconnected from the ICS.
The sum of COM 1 RX, NAV 1 RX and Direct Audio 2 (and Direct Audio 1 if configured by ProCS™) is routed to the
RIGHT USER PHN output. The RIGHT USERPHN is routed to the RIGHT CVR output.
3.4.3
Auto Emergency Mode
The unit will enter emergency mode automatically if power to the unit is off.
Other than Emergency operation described above, no functions of the JA94-N01A will operate when power is lost.
Legends and annunciators will not be illuminated.
3.4.4
Selected Emergency Mode
If the JA94-N01A retains power, the unit can be placed into emergency mode by rotating the Left User TX control to
the EMER position (pull to turn).
Emergency mode conditions will apply (see above) but all other functions of the JA94-N01A will operate. The LEDs,
legends and annunciators will retain normal functionality
.
