User's Manual

Model 1150A DVOR
6-8 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.
l. Use the PMDT to display RMS >> RMS Data >> Power Supply Data, OB Light Amps and verify the
reading is within 0.3 amps of DVM reading.
m. If not within 0.3 amps adjust 1A5A2 BCPS R44 so the RMS >> RMS Data >> Power Supply Data, OB
Light Amps is within 0.3 amps.
n. At the shelter circuit breaker panel turn off AC power for the VOR obstruction lights.
o. Remove the DVM and reconnect the OB LITE line wire to the AC Monitor (1A6) TB1 position 2.
p. Restore AC power to the VOR obstruction light at the circuit breaker panel.
q. Restore the VOR to the NORMAL STATE.
6.4.2
Alarm Volume Adjustment Procedure
a. Locate the Volume adjust pot at the bottom right of the System Controls on the 1A1 LCU.
b. Press the lamp test switch to activate the audio alarm.
c. Using the adjustment tool provided with the accessory kit, adjust the volume pot clockwise to increase the
volume or counterclockwise to lower the volume until the desired sound level is obtained.
6.4.3
RMS Facilities Exterior and Interior Temperature Calibration
a. If a precision thermometer is not available then skip this procedure.
b. Put the VOR into the BYPASS STATE.
c. Select RMS >> DATA >>A/D DATA.
d. If an external Temperature Sensor Assembly is connected to J7 of the 1A9 Interface CCA then adjust
1A19R41 until the PMDT “Outside Temperature” display matches the temperature shown on an external
thermometer as it is located near the Temperature Sensor Assembly.
e. Adjust 1A9R42 until the “Inside Temperature” display matches the temperature shown on an internal
thermometer as it is located near the 1A9 Interface CCA.
f. Restore the VOR to the NORMAL STATE.
6.4.4
Reassign Main/Standby Transmitters (Dual Systems Only)
a. Log on to the PMDT.
b. Point and click on the Tx 1 Main or the Tx 2 Main Button as desired on Sidebar.
6.4.5
Verification of BITE VSWR Calibration
a. Use the PMDT to turn both transmitters off.
b. Disconnect the Carrier feed cable from the top of the DC1 directional coupler in the DVOR cabinet.
Connect a type “N” barrel to the directional coupler. Connect a type “N” TEE to the barrel and attach a
250W load to the TEE. Attach type “N” barrel to the remaining open port of the TEE. This simulates a
1.22:1 load. If a 250 Watt load is not available a 25 Watt load may be used for less than 1 minute for this
test.
c. Turn on transmitter 1 by pointing and clicking the Tx 1 Antenna button. Place transmitter in BYPASS by
pointing and clicking the Bypass button.
d. Select screen Transmitters>>Data>> Transmitter 1 observe Carrier VSWR. The display VSWR should be
between 1.20 to 1.23.
e. If the level is not within this range, carefully adjust (on the 1A4A4 RF Monitor Assembly) the transmitter
reflected power detector potentiometer 1A4A4 R2 (TX RFD). Turning the pot clockwise will increase
VSWR reading and counterclockwise will decrease. Make a small adjustment and wait for display to
stabilize.
f. Point and click the OFF button for Transmitter 1 and Transmitter 2.
g. Move the barrel, bullet, and TEE to the Sideband 1 feed cable at 1A11J25. Place a 5W termination on the
TEE output. Place the Carrier Transmitter cable back to its original position.
h. Turn on transmitter 1 by pointing and clicking the Tx 1 Antenna button. Place transmitter in BYPASS by
pointing and clicking the Bypass button.