User's Manual

Model 1150A DVOR
Rev. - November, 2008
This document contains proprietary information and such information may not be disclosed
to others for any purposes without written permission from SELEX Sistemi Integrati Inc.
6-3
6.2.5
Modulation Frequency Performance Check
a. Verify that transmitter 1 is operating on antenna by pointing and clicking on the Sidebar Tx1 Antenna.
b. Select Transmitters>> Data>>Transmitter 1.
h. Verify that the 30 Hz AM frequency is within the tolerance of Table 4-1(c)(4).
c. Verify the 30 Hz FM frequency is within the tolerance of Table 4-1(c)(3).
d. Verify the 9960 Hz frequency is within the tolerance of Table 4-1(c)(2).
NOTE
The frequencies displayed are measured with enough precision to certify the operating
tolerances of transmitter.
e. For dual transmitters change operating transmitter to 2 by pointing and clicking Tx 2 antenna on the
sidebar.
f. Select Transmitters>> Data>> Transmitter 2 and allow the BITE data to update.
g. Verify the 30 Hz AM frequency is within the tolerance of Table 4-1(c)(4).
h. Verify the 30 Hz FM frequency is within the tolerance of Table 4-1(c)(3).
i. Verify the 9960 Hz frequency is within the tolerance of Table 4-1(c)(2).
j. Change operating transmitter to 1 by pointing and clicking on the Sidebar Tx1 Antenna.
6.2.6
Antenna VSWR Performance Check
a. Verify that transmitter 1 is operating on antenna by pointing and clicking on the Sidebar Tx1 Antenna.
b. Select Transmitters>> Data>>Transmitter 1. Observe Carrier VSWR and verify that this value is less than
the Operating Tolerance of Table 4-1(e)(1). If out of tolerance refer to paragraph 6.4.5.
c. On the same screen, observe Sideband 1, Sideband 2, Sideband 3 and Sideband 4 VSWR. Verify that these
values are less than Operating Tolerance of Table 4-1(e)(1). If out of tolerance refer to paragraph 6.4.5.
d. On screen Monitors>>Data>> Sideband Antenna VSWR observe the sideband antenna VSWR. Verify that
no antennas are out of tolerance as indicated by an alert condition.
6.2.7
Automatic Transfer Performance Checks (Dual Equipment only)
a. Log on to system. Select Local mode by pointing and clicking on the Local button. Select transmitter 1 as
main by pointing and clicking the Tx1 main button.
b. Enter the Transmitters>> Configuration>> Offsets and Scale Factors screen and record, then change the
Azimuth Angle Offset for Transmitter 1 so that an out-of-tolerance condition exists for Monitor 1 and
Monitor 2. Press F7 to apply.
c. Verify that transmitter 1 turns off and approximately 20 seconds later transmitter 2 is energized on antenna
d. Enter Transmitters>> Configuration>>Offsets and Scale Factors screen and restore the angle offsets to the
original settings. Press F7 to apply.
e. Select transmitter 2 as main by pointing and clicking on Tx 2 main button.
f. Enter the Transmitters>>Configuration>>Offsets and Scale Factors screen and record, then change the
Azimuth Angle Offset for Transmitter 2 so that an out-of-tolerance condition exists for Monitor 1 and
Monitor 2. Press F7 to apply.
g. Verify that transmitter 2 turns off and approximately 20 seconds later transmitter 1 is energized on antenna
Enter Transmitters>> Configuration>>Offsets and Scale Factors screen and restore the limits to the original
settings. Press F7 to apply.
h. Restore the appropriate Main transmitter to normal operation.
6.2.8
VOR Monitor Performance Check
a. Select Monitor 1>>Data>>Status Screen.
b. Verify that no maintenance alerts indications are backlit in yellow.
c. Verify that no alarm indications are backlit in red.