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Northern Airborne Technology NPX136D User Manual

Page 19

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NPX136D Installation Approval Test Procedure

Rev. 1.00

Apr 22, 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 NPX136D 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 NPX136D 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

NPX136D PASS

FAIL

PASS

FAIL

143.2187

MHz

143.2200

MHz

153.4500

MHz

157.5400

MHz

157.5437

MHz


NOTES: