TEL T-48, Operating And Maintenance Manual

Page: 6 / 36

Revision A T-48 90 008 026
iv
Table of Contents (continued)
Chapter Page
Section A- Routine Maintenance
4.2 General………………………………………………………………………………. 4-2
4.2.1 Cleaning
Procedure…………………………………………………………... 4-2
4.2.2 Inspection of Connectors, Cables and Test Assembly……………………….. 4-2
4.2.3 Battery Check and Charging…………………………………………………. 4-3
Section B- Test Set Verification and Acceptance Checks
4.3 General………………………………………………………………………………. 4-4
4.3.1 Test
Equipment Required…………………………………………………….. 4-4
4.3.2 Display Operation………………………………………………...................... 4-4
4.3.3 Transmitter Frequency Test…………………………………………………... 4-5
4.3.3.1 Direct Method………………………………………………………. 4-5
4.3.3.2 Reference Method………………………………………………….. 4-5
4.3.4 Receiver Local Oscillator Test………………………………………………. 4-6
4.3.5 Omni-Directional Antenna Transponder Test…………………....................... 4-6
4.3.6 TAP-135 Antenna Coupler Test……………………………………………… 4-7
4.3.7 TAP-141 Direct Connect Antenna…………………………………………… 4-8
Section C- Annual Calibration and Alignment
4.4 General………………………………………………………………………………. 4-10
4.5
Test Equipment Required……………………………………………………………. 4-10
4.6
Disassembly…………………………………………………………………………. 4-10
4.7 Digital PCB Adjustment Procedures………………………………………………… 4-11
4.7.1 Frequency Voltage Settings………………………………………………….. 4-11
4.8 RF-PCB Procedure…………………………………………………………………... 4-13
4.8.1 Voltage Settings………………………………………………………………. 4-13
4.8.2 Frequency Settings…………………………………………………………… 4-13
4.8.3 Dynamic Range and RF Output Power Level Setting………………………... 4-14
4.8.4 1090 MHz Receiver Sensitivity Test…………………………………………. 4-15
4.8.5 RF Power and Frequency Measurement/Calibration Setting………………… 4-16
Section D- Battery Replacement
4.9
Battery Replacement…………………………………………………….................... 4-17