User's Manual

Model 1150A DVOR
6-2 Rev. - November, 2008
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to others for any purposes without written permission from SELEX Sistemi Integrati Inc.
6.2 PERFORMANCE CHECK PROCEDURES
Should abnormal performance occur during the performance check procedures, refer to Section 7.
6.2.1
Battery Backup Transfer Performance Check
a. Select RMS>>Status.
b. With all cabinet circuit breakers in the ON position (AC and DC), turn off AC circuit breaker for
Transmitter 1. Verify that the DVOR system continues to function and that “On Batteries” changes from
No to Yes.
c. If the VOR is a dual system, Turn off AC circuit breaker for Transmitter 2. Verify that the DVOR system
continues to function and that “On Batteries” changes from No to Yes.
d. Restore AC power for Transmitter 1 and Transmitter 2 if dual equipment. Verify that the system continues
to function and that “On Batteries” changes from Yes to No for both systems if dual.
6.2.2
Carrier Output Power Performance Check
a. Verify that transmitter 1 is operating.
b. Select screen Transmitters>>Configuration>>Nominal. Verify Carrier Power is the same as commissioning
normally 100 watts (en route) or 50 watts (terminal).
c. Select VOR Transmitters>>Data>>Transmitter 1, observe that Carrier Power is within the operating
tolerance of Table 4-1(b)(1). If not in tolerance perform alignment per paragraph 6.4.7.
d. For dual system change operating transmitter to 2 by pointing and clicking on the Sidebar Tx2 Antenna.
e. Select screen Transmitters>>Data>>Transmitter 2, and observe that Carrier power is within the operating
tolerance of Table 4-1(b)(1). If not in tolerance perform alignment per paragraph 6.4.7.
f. Change operating transmitter to 1 by pointing and clicking on the Sidebar Tx1 Antenna.
6.2.3
Carrier Frequency Performance Check
a. Verify that transmitter 1 is operating.
b. Connect frequency counter to “FREQ SAMPLE” jack J2 of Synthesizer Generator Assembly (1A3A1).
c. Observe the station operating frequency on the frequency counter. Verify that the frequency is within the
tolerance in Table 4-1(c)(1).
d. For dual system connect frequency counter to “FREQ SAMPLE” jack J2 of Frequency Synthesizer
assembly (1A3A11).
e. For dual system change operating transmitter to 2 by pointing and clicking on the Sidebar Tx2 Antenna.
f. Observe the station operating frequency on the frequency counter. Verify that the frequency is within the
tolerance of Table 4-1(c)(1).
g. Change operating transmitter to 1 by pointing and clicking on the Sidebar Tx1 Antenna.
6.2.4
Monitor 30 Hz and 9960 Hz Modulation Percentage and Deviation Ratio Performance Check
a. Select Monitors, Data Integrity Screen on the PMDT.
b. Observe the Monitor 1, 30 Hz modulation and verify it is within the alarm low and alarm high limits as
indicated by the green background. (Red indicates out-of-tolerance)
c. Observe Monitor 1, 9960 Hz modulation and verify it is within alarm low and alarm high limits.
d. Observe Monitor 1, Deviation data and verify it is within alarm low and alarm high limits.
e. Observe Monitor 1, Identification Modulation and verify it is within alarm low and alarm high limits.
f. Observe Monitor 2, 30 Hz modulation and verify it is within the l alarm low and alarm high limits.
g. Observe Monitor 2, 9960 Hz modulation and verify it is within alarm low and alarm high limits.
h. Observe Monitor 2, Deviation data and verify it is within alarm low and alarm high limits.
i. Observe Monitor 2, Identification Modulation and verify it is within alarm low and alarm high limits
j. For dual transmitters, change operating transmitter by pointing and clicking Tx2 Antenna. Repeat steps a.
through i. after Monitors have stabilized.
k. Change operating transmitter to 1 by pointing and clicking on the Sidebar Tx1 Antenna.