User's Manual

MODEL 2130 MARKER BEACON
5-4 Rev. A April, 2005
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.
5.3.1.2 Procedure
a. Enter Level 3 User ID and password.
b. Push the Local switch on the LCU. Verify that the Local LED is lit.
c. Push the Integral and Standby Bypass switches. Verify that the Bypass LEDs are lit for all valid monitors.
d. Insert RF sniffer in Course CSB wattmeter body.
e. Using a test cable, connect frequency counter to RF sniffer.
f. Turn Off the modulation.
g. Read the frequency on the counter.
h. Record the frequency and confirm that the value is within the tolerance of Table 3-1.
i. Return the Marker Beacon to normal operation.
5.3.2 RF Output Power BITE Calibration
5.3.2.1 Test Equipment Required
Bird Wattmeter body
Bird Sniffer element
5.3.2.2 Procedure
a. Remove primary power.
b. Insert wattmeter with 5W, 50 to 125-MHz element and dummy load into RF output transmission line.
c. Turn on Marker Beacon. After Marker Beacon initializes to the normal state, type in the system password.
d. Place equipment in bypass mode.
e. Adjust wattmeter element to read forward power.
f. Read Forward RF Power in Transmitters>>Data>>Power Sensor Data.
g. Adjust Transmitter>> Configuration >> Power Sensors Offset and Scale factors for the power level measured.
h. Return system to normal operation.
5.3.3 Modulation Percentage BITE Calibration
5.3.3.1 Test Equipment Required
Bird Wattmeter thruline body
Bird Sniffer element
5.3.3.2 Procedure
a. Disconnect primary power.
b. Insert wattmeter with sniffer element and dummy load into RF output transmission line.
c. Connect sniffer element to oscilloscope.
d. Turn on Marker Beacon. After Marker Beacon initializes to the normal state, type in the system password.
e. Put Marker Beacon in bypass mode, then turn keying signal to continuous tone.
f. Observe RF envelope maximum and minimum on oscilloscope.
g. Calculate modulation percentage using the following formula:
100% ×
+
−
=
VmVp
VmVp
Modulation
where Vp = Peak voltage