CMC electronic Esterline CMA-5024 User Manual

INSTALLATION MANUAL
CMA-5024 GLSSU
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Page 206
Revision 1 Jan 19, 2009
Note: As a minimum, the GLSSU should track 4 or 5 satellites otherwise it will not be able to
enter the navigation modes. The number of satellites reported visible by the GLSSU may
be much larger. How many satellites are actually visible and are being tracked is not
easily predictable, depending upon the local time and conditions.
Note: This test can only be completed if the GLSSU is in NAV, SBAS NAV, or SBAS PA mode.
Note: This test must be repeated for each FMS connected to the GLSSU, in order to verify that
they are all operating and connected properly.
E. Check the Predictive RAIM
Note: This test must be repeated for each FMS connected to the GLSSU, in order to verify that
they are all operating and connected properly.
If a manual predictive RAIM function is available in this installation, make a predictive RAIM request and
verify that the GLSSU provides a response to this request. If the function is not available, ignore the
check.
F. Verify that the High Integrity Switch (HIS) passes-through the DME/ILS data
This test must be performed whenever the HIS devices in the GLSSUs are connected to the DME/ILS
instruments, to ensure that the DME/ILS data will pass-trough.
- Check that the GLSSU is powered-up and operating.
- Select the ILS source (typically, by means of a pilot-operated switch that selects the ILS/GLS
source for the HIS).
- Perform the guidance test on the ILS and verify proper operation of the DME/ILS displays in the
cockpit. Refer to the applicable aircraft manual.
- Repeat this test for each GLSSU
G. Verify that the auxiliary HIS power inputs are functional
This test must be performed whenever the HIS power inputs (at connector pins J3-1 and J3-2) are
connected to 28 VDC sources, to ensure that the DME/ILS data will pass-trough in case of a failure of a
GLSSU or of its 28 VDC power input:
- Open the circuit breaker of the GLSSU in order to shut-it down; check that indeed it is shut-
down.
- Perform the guidance test on the ILS and verify proper operation of the DME/ILS displays in the
cockpit. Refer to the applicable aircraft manual.
- Repeat this test for each GLSSU
Note: It is expected that the HIS power input s are feed through circuit breakers and electrical circuits
independent from the main 28 VDC GLSSU power inputs, in order to provide redundancy in
case of power failure.
5. ELECTROMAGNETIC COMPATIBILITY AND INTERFERENCE TESTS
A. Test cycle / pass-fail criteria
The measurements from the test paragraph B below will serve as a baseline to detect possible RF
interference effects. Significant changes in these measurements or the dropping-out of the current
navigation mode will be monitored while each interference test condition is applied.
34-52-81-1
The document reference is online, please check the correspondence between the online documentation and the printed version.

CMC electronic Esterline CMA-5024 Specifications

General

Brand	CMC electronic
Model	Esterline CMA-5024
Category	Accessories
Language	English