NPX138 Installation Approval Test Procedure
Rev. 1.10
Apr 19, 2004
Page 2 of 7
E NG-FORM: 634-0100.DOT
CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.
4. Results
If the installed system passes all of the applicable EMI tests, then no further action is
required. If interference is observed, then the interference must be assessed against
the appropriate standards of airworthiness for the system in question. For example: it is
permissible for a VFR certified GPS to lose navigation capability while the NPX138 is
transmitting, providing that it recovers properly and promptly, but it is not permissible for
an IFR Approach certified GPS to be affected in the same way. A complete discussion
of all the standards of airworthiness to be applied in assessing EMI effects is beyond
the scope of this document.
5. Procedure
A.
Operate the NPX138 transmitter on the following frequencies for at least 20 seconds.
Observe the GPS for any degradation in satellite status, or availability, or flags.
FREQUENCIES
GPS #1
GPS #2
NPX138 PASS
FAIL
PASS
FAIL
143.2187
MHz
143.2200
MHz
153.4500
MHz
157.5400
MHz
157.5437
MHz
NOTES:
The document reference is online, please check the correspondence between the online documentation and the printed version.
