INSTALLATION MANUAL
CMA-5024 GLSSU
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Page D.2
November 21, 2008
Note that when the X-Talk input is connected and the Synchronized Approach Selection APD is On,
any label 355 received on a X-Talk input will be re-transmitted on the “GLS type” output busses in
addition to the one generated by the GLSSU; the SDI bits are used to determine the source of the
label. The GLSSU will not re-transmit labels when the equipment connected to the X-Talk input has the
same SDI setting as the GLSSU; such SDI conflicts are reported on label 156 bit 12.
PIN
NUMBER
SIGNAL NAME/SOURCE BUS SPEED TYPE CHECK PRESENCE OF
FOLLOWING LABELS
J1-38 No.1 429 Out Hi
J1-39 No.1 429 Out Lo
J1-24 No.2 429 Out Hi
J1-25 No.2 429 Out Lo
J1-29 No.3 429 Out Hi
J1-30 No.3 429 Out Lo
High or Low GPS bus
J3-54 429 GLS/GPS #1 Out HI
J3-55 429 GLS/GPS #1 Out LO
J3-56 429 GLS/GPS #2 Out HI
J3-57 429 GLS/GPS #2 Out LO
J3-58 429 GLS/GPS #3 Out HI
J3-59 429 GLS/GPS #3 Out LO
High only GLS or
GPS bus
150 UTC
273 GLSSU STATUS*
355 GPS FAULT SUMMARY*
J3-46 429 out ILS Look-Alike #1 HI
J3-47 429 out ILS Look-Alike #1 LO
J3-48 429 out ILS Look-Alike #2 HI
J3-49 429 out ILS Look-Alike #2 LO
ILS bus Check the GLS source
selection: Verify that label 033
is present whether the ILS
data sources on both
inputs
are shutdown or turned-on.
Check the ILS source
selection: Verify that label 033
is not present when the ILS
data source on the
corresponding input is
shutdown, and is present
otherwise.
J3-50 429 out DME Look-Alike #1 HI
J3-51 429 out DME Look-Alike #1 LO
J3-52 429 out DME Look-Alike #2 HI
J3-53 429 out DME Look-Alike #2 LO
Low only
DME bus Check the GLS source
selection: Verify that label 035
is present whether the DME
data sources on both
inputs
are shutdown or turned-on.**
Check the ILS source
selection: Verify that label 035
is not present when the DME
data source on the
corresponding input is
shutdown, and is present
otherwise.
* The SSM bits of these words are never set to NCD, so that they should always be accepted and
displayed by the receiving equipment. Note that only label 355 is present during Self-Test mode.
** When a DME input source is turned-off, it will takes around 3 seconds for the GLSSU to start generating
label 035 on its own instead of substituting the data of the input label.
The document reference is online, please check the correspondence between the online documentation and the printed version.