True heading (314), Corrected barometric altitude (204), Computed airspeed (206) – Honeywell MK VI User Manual
Page 287: True airspeed (210), Decision height \(370\) – ioc scaling, Normal acceleration (333)

Honeywell
MK VI MK VIII EGPWS Installation Design Guide
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287
23-19
Unused (always 0)
24
Program Pin A Status
25
Program Pin B Status
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Program Pin C Status
27
Program Pin D Status
28
Program Pin E Status
29
Unused (always 0)
6.2.37 True Heading (314)
TRUE HEADING
Source: IRS/AHRS/IOC
LABEL (Octal) 314
Units: Degrees/180
Max. Range: +/- 180 Degrees
Approx. LSB: 0.00549 Degrees
Data Bits: 14 to 28 = 15
+ = Clockwise from North
Sign Bit: 29
Pad Bits: 11 to 13
Transmit Interval (mSec): 25 to 50
Data Type: 2’s Complement Binary
SDI Bits: 9, 10
6.2.38 Corrected Barometric Altitude (204)
CORRECTED BAROMETRIC ALTITUDE
Source: ARINC 706 DADC or IOC
LABEL (Octal) 204
Units: Feet
Max. Range: 131,072 Feet
Approx. LSB: 1 Foot
Data Bits: 12 to 28 = 17
+ = Above Sea Level (ASL)
Sign Bit: 29
Pad Bits: 11
Transmit Interval (mSec): 31.3 to 62.5
Data Type: 2’s Complement Binary
SDI Bits: 9, 10
6.2.39 Computed Airspeed (206)
COMPUTED AIRSPEED
Source: ARINC 706 DADC or IOC
LABEL (Octal) 206
Units: Knots
Max. Range: 1,024 Knots
Approx. LSB: 0.0625 Knot
Data Bits: 15 to 28 = 14
+ = Forward
Sign Bit: 29
Pad Bits: 11 to 14
Transmit Interval (mSec): 62.5 to 125(100 if DAU)
Data Type: 2’s Complement Binary
SDI Bits: 9, 10
6.2.40 True Airspeed (210)
TRUE AIRSPEED
Source: IOC
LABEL (Octal) 210
Units: Knots
Max. Range: 2,048 Knots
Approx. LSB: 0.0625 Knot
Data Bits: 14 to 28 = 15
+ = Forward
Sign Bit: 29
Pad Bits: 11 to 13
Transmit Interval (mSec): 62.5 to 125
Data Type: 2’s Complement Binary
SDI Bits: 9, 10
6.2.41 Decision Height (370) – IOC Scaling
DECISION HEIGHT
Source: IOC
LABEL (Octal) 370
Units: Feet
Max. Range: ±8192 FT
See NOTE 1
Approx. LSB: 0.125 Foot
Data Bits: 13 to 28 = 16
+ = Above Ground Level (AGL)
Sign Bit: 29
Pad Bits: 11,12
Transmit Interval (mSec): 100 to 200
Data Type: 2’s Complement Binary
SDI Bits: 9, 10
NOTE 1: Some IOC configurations may only provide positive ranges (0 to 8192 Feet), however the EGPWS supports
both positive and negative ranges (+/- 8192 Feet) for all configurations.
NOTE 2: This label may be provided in a configuration with a single DH input or in conjunction with a selected MDA
input. For those configurations which provide DH and MDA on separate labels, Format 3 applies (Format 1 is
0/0 SDI, Format 2 is Left SDI used and Format 3 is No SDI.)
6.2.42 Normal Acceleration (333)
NORMAL ACCELERATION
Source: IOC
LABEL (Octal) 333
Units: g’s
Max. Range: +/-4.0 g’s
Approx. LSB: 0.000977 g’s
Data Bits: 17 to 28 = 12
+ = Up See NOTE
Sign Bit: 29
Pad Bits: 11 to 16
Transmit Interval (mSec): 10 to 20
Data Type: 2’s Complement Binary
SDI Bits: 9, 10
NOTE: Output reads 0 g’s nominal when aircraft is on the ground, or during unaccelerated flight.