Installation Manual

THALES Communications
OIM
AHV1600-SYSTEM
Page 118
July 16/09
- differential null level voltage : 0 Vdc  0.5 Vdc
- differential output impedance : 75
 
5

(b) When measured to the AID ground reference signal in loaded circuit
- differential low level voltage : between  - 11 Vdc and  - 7.25 Vdc
- differential high level voltage : between

+ 7.25 Vdc and

+ 11 Vdc
- differential null level voltage : between

- 0.5 Vdc and

+ 0.5 Vdc
(2) LIGHTNING PROTECTION
Both differential output signals are protected against the indirect effect of lightning.
(3) TIMING CHARACTERISTICS
- Differential rise time : 10 µs  5 µs.
- Differential fall time : 10 µs

5 µs.
When measured from 10% to 90% level of the differential changing voltage in open circuit.
C. AID SIGNALS INTERFACE
(1) CONFIGURABLE INPUT SIGNALS
The transceiver receives the configurable input signals “AID_P” and “AID

2..0

” from the Naviga-
tion computer to code the Aircraft Installation Delay. To select the Aircraft Installation Delay, each
dedicated “AID_P” and “AID

2..0

” configurable input signal must be connected as short as possi-
ble to the “AID GROUND” reference signal (or left open).
(2) ELECTRICAL CHARACTERISTICS
- Low level voltage :  + 3.5 Vdc with sink current  2 mA (logic state 1),
- High-level voltage :

+ 15.3 Vdc with sink current

1 mA (logic state 0),
- Maximum level voltage

+ 32.2 Vdc.
When measured to the “M_GND” reference signal.
(3) LIGHTNING PROTECTION
- Configurable input signals are protected against the indirect effect of lightning.
(4) FUNCTIONAL CHARACTERISTICS
- AID length definition: from TX transceiver output to TX antenna through coaxial cable and from
TX antenna to ground through the air and from ground to RX antenna through the air and from
RX antenna to RX input transceiver through coaxial cable
- AID is coded by the “AID_P” and “AID 2..0” configurable input signals.