Sanden SN3500, Installation Manual, Page: 91 / 150

Appendix E: Checkout Procedures
82005-IM-K Sandel SN3500 Installation Manual Page 11-5
Remove power to (or otherwise disable) the remote directional gyro. Verify that
the compass card is displayed in amber AND that a warning message is
displayed on the SN3500 which requires operator acknowledgement.
Completed _______ Comment __________________________________
11.1.8 NAV Source Selection
If the SN3500 is configured in “master” mode (no external NAV/GPS switch):
Press the [NAV] button repeatedly and verify that the screen legend next to the
button cycles correctly through the configured NAV sources, i.e. NAV1, NAV2,
GPS1, GPS 2, TACAN 1, TACAN 2 (or as configured). For each NAV source,
create valid and invalid NAV conditions and verify correct display of the SN3500
NAV flag for each receiver (the large red “X” through the CDI). For each
VOR/LOC source, verify that tuning an ILS frequency causes the glideslope
(vertical deviation) scale to display on the screen, even if it is flagged.
Completed _______ Comment __________________________________
[If ILS Lockout is enabled] Press the [NAV] button and select a source
other than
NAV1, such as GPS or NAV2 (if configured). Tune NAV1 to an ILS frequency,
and verify that after a one-second delay, the selected NAV source automatically
reverts to NAV1. Verify that as long as NAV1 is tuned to an ILS frequency,
pressing the [NAV] button will not change the NAV source, but instead will display
the message “NAV1 TUNED TO LOC”. Verify that upon
de-tuning the ILS
frequency from NAV1, the NAV source selection returns to its original state.
Completed _______ Comment __________________________________
If NAV2 is configured, tune both NAV1 and NAV2 to an ILS frequency and verify
that NAV1 remains selected. Detune the ILS frequency on NAV1 and verify that
the display reverts to NAV2.
Completed _______ Comment __________________________________
If the SN3500 is configured in “slave” mode (using external NAV/GPS switch):
Verify that pressing NAV does not change the selected NAV source, but instead
displays an advisory message.
Completed _______ Comment __________________________________