INSTALLATION MANUAL
CMA-5024 GLSSU
This document includes Proprietary Information and shall not be reproduced or communicated to third party
without prior written permission by CMC Electronics Inc.
Page E.14
November 21, 2008
When Off, it indicates that the APD data corresponding to that SDI setting is not provided in
the APD Configuration.
Data must be provided for every SDI setting in the installation when an output of deviations
or of a position at the aircraft navigation center is required. Approach selection and
navigation center computation are inhibited when this data is not defined for the current SDI
setting and the selected APD Configuration; no deviation data will be computed without a
navigation center.
(16) Command Summary Word on FMS inputs
When On, the Command Summary Word label 227 is accepted on any of the IRS/FMS and
FMS/DADS input busses.
When Off, the Command Summary Word label 227 is ignored on any of the IRS/FMS and
FMS/DADS input busses.
The Supplementary Command Summary Word label 304 is not affected by the APD setting.
This setting is selected for compatibility with the equipment connected to the FMS busses. It
is set On only when the FMS uses the Command Summary Word for the GLSSU.
(17) SBAS Corrections on Labels 061&062
When On, the Measurement block Pseudo-Range data on labels 061&062 includes SBAS
corrections when the mode reported by the GLSSU Status label 273 is either SBAS
Navigation or SBAS PA; SBAS ionospheric corrections are applied when available
irrespective of the mode.
Note that the Delta-Range and the satellite position outputs in the measurement block never
include any SBAS corrections.
When Off, the measurements are corrected for the satellite clock, relativistic, ionospheric
errors per IS-GPS-200, and tropospheric errors per DO-229.
This setting is selected to match the capability of the user of the measurement block data.
When On, the following Label Assignment ID APD parameters must be set to zero: SBAS
Range Offset, SBAS Ionospheric Offset, and URA Offset. A setting of Off when the above
Label Assignment ID APD parameters are zero requires that the GPS Only Measurement
Block be set to On.
ARINC 743A-4 includes SBAS corrections based on the navigation mode. The GLSSU
includes then solely based on this APD setting.
(18) GPS Height Output on GPS bus
The outputs of type “GLS bus” always report the GPS Height label 370; this APD affects only
outputs of type “GPS bus”.
When On, the GPS Height label 370 is output on the GLS/GPS ARINC 429 outputs of type
“GPS bus”.
The document reference is online, please check the correspondence between the online documentation and the printed version.
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