User's Manual

MODEL 2130 MARKER BEACON

5-6 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.

5.3.5 Forward and Reflected RF Power BITE Calibration

5.3.5.1 Test equipment required

a. Facility built in wattmeter

b. Bird Wattmeter Thuline body with 5 Watt, 50-125 MHz, 1 Watt or less, 50-125 MHz or alternately an HP 437B power

meter or equivalent.

c. PMDT

5.3.5.2 Procedure

a. Remove system power and insert wattmeter with 5W, 50-125 MHz element into RF output transmission line.

b. Place a Tee and two 50 ohm loads on the output cable to the antenna.

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 Transmitters>> Configuration>> Power Sensor Offsets and Scale Factors>> Tx 1 Forward Scale Factor to

100%.

f. Turn OFF Transmitter 1 and adjust Transmitters>> Configuration>> Power Sensor Offsets and Scale Factors>> Tx 1

Forward Offset until Transmitter>>Data>> Power Sensor Data>> Forward Power is 0.00 +/-0.05 Watts.

g. Adjust Transmitters>> Configuration>> Power Offsets and Scale Factors>> Tx 1 Reflected Offset until

Transmitter>>Data>> Power Sensor Data>> Transmitter 1>> Reflected Power is 0.00 +/-0.05 Watts.

h. If dual transmitter repeat steps e through g for Transmitter 2.

i. Turn ON Transmitter 1 and adjust Transmitters>> Configuration>> Power Sensor Offsets and Scale Factors>> Tx 1

Forward Scale Factor until Transmitter>>Data>> Power Sensor Data>> Transmitter 1>> Forward Power is the same as

the external power sensor +/-0.05 Watts. Verify the BITE error is within Table 3-1 tolerance using the formula:

IndicationPowerentTestEquipm

IndicationPowerBITEIndicationPowerTestEq

Error

___._

−

j. Adjust Transmitters>> Configuration>> Power Sensor Offsets and Scale Factors>> Tx 1 Reflected Scale Factor until

Transmitter>>Data>> Power Sensor Data>> Transmitter 1>> Reflected Power is the same as the external power

sensor +/-0.01 Watts.