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label 210: TRUE AIRSPEED.
(d)
GPS inputs The IR portion is provided with two ARINC 429 high speed buses from the GPS portion of the Multi-Mode Receivers (MMRs). These buses transmit the following data words:
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label 060: MEASUREMENT STATUS
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label 061: PSEUDO RANGE
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label 062: PSEUDO RANGE FINE 4
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label 063: RANGE RATE
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label 064: DELTA RANGE
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label 065: SV POSITION X
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label 066: SV POSITION X FINE 4
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label 070: SV POSITION Y
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label 071: SV POSITION Y FINE 4
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label 072: SV POSITION Z
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label 073: SV POSITION Z FINE 4
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label 074: UTC MEASURE TIME
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label 076: GPS ALTITUDE (MSL)
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label 101: HDOP
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label 102: VDOP
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label 103: GPS TRACK ANGLE TRUE
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label 110: GPS LATITUDE 2
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label 111: GPS LONGITUDE
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label 112: GPS GROUND SPEED
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label 120: GPS LATITUDE LSBS 2
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label 121: GPS LONGITUDE LSBS
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label 125: GPS UTC BCD
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label 130: GPS INTEGRITY LIMIT
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label 136: VERTICAL FIGURE OF MERIT
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label 140: UTC BIN FINE 4
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label 141: UTC BIN FRACTION 4
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label 150: GPS UTC BIN
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label 165: GPS VERTICAL VELOCITY
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label 166: GPS NORTH VELOCITY
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label 174: GPS EAST VELOCITY
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label 247: HORIZ FIGURE OF MERIT
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label 260: GPS DATE
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label 273: GPS SENSOR STATUS
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label 377: EQUIPMENT IDENT
(2) Analog inputs The IR portion is provided with analog inputs for power supply and GPS/IRS synchronization purposes. For more details Ref. 34-12-00.
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(3) Discrete inputs The IR portion is provided with the following discrete inputs:
---------------------------------------------------------------------| INPUT SIGNAL | INPUT | INPUT | | | | DEFINITION | ---------------------------------------------------------------------| Mounting position 1 | Open/GND | see table 2 | | Mounting position 2 | Open/GND | see table 2 | | SDI MSB (Middle insert) | Open/GND | 0/1 | | SDI LSB (Middle insert) | Open/GND | 0/1 | | IR OFF | Open/GND | Momentary action | | IR mode select M1 | Open/GND | see table 3 | | IR mode select M2 | Open/GND | see table 3 | | Auto ADR.DADS select | Open/GND | see table 4 | | Manual ADR.DADS select | Open/GND | see table 4 | | Aircraft Ident Code 1/0 | Open/GND | 0/1 | | Aircraft Ident Code 2/0 | Open/GND | 0/1 | | Aircraft Ident Code 4/0 | Open/GND | 0/1 | | Aircraft Ident Code 8/0 | Open/GND | 0/1 | | Aircraft Ident Code 16/0 | Open/GND | 0/1 | | Aircraft Ident Code 32/0 | Open/GND | 0/1 | | Aircraft Ident Code 64/0 | Open/GND | 0/1 | | Aircraft Ident Code Parity | Open/GND | 0/1 | | IR remote test | Open/GND | No test/test | | GPSSU 1 present | Open/GND | GND = present | | GPSSU 2 present | Open/GND | GND = present | | GPS priority select | Open/GND | Normal priority/ | | | | Reserved priority | ---------------------------------------------------------------------
Table 1 : IR Discrete Inputs
(a) Mounting positions 1 and 2 These discrete inputs provide the IR with the unit orientation data which give the longitudinal and lateral axis of the aircraft. Table 2 below gives the unit position according to the discrete selection.
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---------------------------------------------------------------| Mounting | Mounting | Connector Position/Aircraft | | Position 1 | Position 2 | | ---------------------------------------------------------------| Open * | Open * | FWD * | | Ground | Open | AFT | | Open | Ground | RIGHT | | Ground | Ground | LEFT | ---------------------------------------------------------------Table 2 : Mounting Position Discretes
*These discretes are wired in FWD position.
(b)
IR mode select The IR portion uses these discrete inputs to know the position of the OFF/NAV/ATT selector switch as follows:
----------------------------------------------| M1 | M2 | OFF/NAV/ATT | | | | Selector Switch Position | |--------------------------------------------| | Open | Open | OFF | | Ground | Open | NAV | | Open | Ground | ATT | ----------------------------------------------Table 3 : IR Mode Select
(c)
ADR DADS select The IR portion uses these discrete inputs to know which air data source to use:
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