ANTRC170V3 Training Unit 5 Maintenance Maintenance Overview General

AN/TRC-170(V)3 Training Unit 5 Maintenance

Maintenance Overview • • General preventive maintenance functions General troubleshooting Fault resolution Line replaceable units (LRUs) for each area of the system • General system monitoring Maintenance AN/TRC 170 Training 2

General Maintenance • Cleaning o General Housecleaning o Securing cables and equipment Maintenance AN/TRC 170 Training 3

Maintenance – Cleaning • • • Air Filter Racks Component Surfaces Maintenance AN/TRC 170 Training 4

Maintenance – Inspection • • Physical Inspection Check for Broken or Damaged Cables, Patches, Hardware Replace or repair as necessary Refer to PMCS for inspection intervals Maintenance AN/TRC 170 Training 5

Physical Inspection - Waveclamp Inspect the wave clamp Maintenance AN/TRC 170 Training 6

Physical Inspection – Waveguide Clamp Waveguide and QRA connectors separating due to excessive Waveguide weight. Maintenance AN/TRC 170 Training 7

Physical Inspection – Waveguide Clamp A nickel is added to create the tension needed to compensate for the separation. Maintenance AN/TRC 170 Training 8

Physical Inspection – TED Patches TED Patch IF/DATA Patch Panel Maintenance Baseband or TED/DAR Patch Panel AN/TRC 170 Training 9

Physical Inspection – DAR Modem Maintenance AN/TRC 170 Training 10

Maintenance – Performance Check Point • Instructors will demonstrate cleaning of exterior air filter • Students will perform cleaning of exterior air filter Maintenance AN/TRC 170 Training 11

Troubleshooting • Refer to manuals • Observe safety practices Maintenance AN/TRC 170 Training 12

Fault Isolation Maintenance AN/TRC 170 Training 13

Fault Isolation – HPA • Alarm Matrix (CCA) • Built In Test Equipment (BITE) Circuitry Alarm Matrix Maintenance AN/TRC 170 Training 14

Fault Isolation – Troposcatter Up-Converter • Summary Alarm LED • BITE Maintenance AN/TRC 170 Training 15

Fault Isolation – Troposcatter Down-Converter • Summary Alarm LED • BITE Maintenance AN/TRC 170 Training 16

Fault Isolation – Dual RF Synthesizer • Summary Alarm LED • BITE Maintenance AN/TRC 170 Training 17

Fault Isolation – DAR Modem LED Fault Panel Maintenance AN/TRC 170 Training 18

Fault Isolation – CS 6716 Modem • Alarm Code Displayed • Use Front Panel Interface • Faulty LRUs are hot swappable Maintenance AN/TRC 170 Training 19

Fault Isolation – CS 6716 Modem Monitor and Alarm Display Maintenance AN/TRC 170 Training 20

Fault Isolation – CS 6716 Modem Front Panel Operation Menu Option Description Menu Sub-Menus MONITOR SUMMARY, ALARMS, RSL, TEMP, AGC, TX APC, BERT, FAN ON/OFFLINE Modem State: OFF LINE or ON LINE CONFIG RATES, DATA CH, FEC, BERT, DEFAULT, ALPC INFO CONFIGURATION INFORMATION SWITCH AUTOMODE, SWITCH TO MODEM A/B , MANUAL MODE MAINT CALIBRATION, VERSIONS SETUP RXGAIN, DIVERSITY, MISC, FLOWCTL, CLKINV DIAG LOOPBACKS, F. P. LED TEST, F. P. DISPLAY TEST Maintenance AN/TRC 170 Training 21

Fault Isolation – CS 6716 Modem Display Alarm Results Example Maintenance AN/TRC 170 Training 22

Fault Isolation – Versa. Mux 4000 • Power On Self Test (POST) • Select Test from Diagnostics menu • User interface modules hot swappable Maintenance AN/TRC 170 Training 23

Fault Isolation – OAC-170 D • Front Panel Alarm LEDs • Troubleshooting Chart (Table 5 -4) in Modem System Upgrade Manual (available on site and as reference material in class) Maintenance AN/TRC 170 Training 24

Fault Isolation – OAC-170 D 70 MHz Amplifier Gain Adjustment • Gain of each of 4 Amplifiers adjustable to 16 d. B • Gain from LNAs to modem adjusted for 40 d. B Maintenance AN/TRC 170 Training 25

Line Replaceable Units (LRUs) • Removable and replaceable by the operator Maintenance AN/TRC 170 Training 26

LRUs – HPA • • • Klystron Tube Alarm Matrix CCA Blower RF Protect and Metering CCA High Voltage Power Supply Maintenance AN/TRC 170 Training 27

LRUs – Troposcatter Up-Converter • • • Fan RF Filter Assembly Intermediate Power Amplifier Radio Frequency Assembly BITE CCA (Circuit Card Assembly) Maintenance AN/TRC 170 Training 28

LRUs – Troposcatter Down-Converter • • • RF Amplifier Tunable Bandpass Filter RF Switch RF Detector Assembly Balanced Mixer/Preamp Assembly BITE CCA Maintenance AN/TRC 170 Training 29

LRUs – Dual RF Synthesizer • • • IF CCA Reference CCA Radio Frequency and Converter Reference Oscillator Multiplier, Dual Frequency Cavity Oscillator Maintenance AN/TRC 170 Training 30

LRUs – DAR Modem • • • Frequency Standard Voltage Regulator Bandpass Filter RF Power Divider Channelizer CCAs Maintenance AN/TRC 170 Training 31

LRUs – CS 6716 Modem • • Analog Board Processor Board Front Panel Display Board Fans Maintenance AN/TRC 170 Training 32

LRUs – Versa. Mux 4000 The following LRUs are replaceable at the operator level. Fiber / Cu module Maintenance AN/TRC 170 Training NRZ module 33

LRUs – OAC-170 • OAC-170 D Maintenance AN/TRC 170 Training 34

LRUs – 48 VDC Power Supply Dual Redundant Power Supplies Maintenance AN/TRC 170 Training 35

System Monitoring Maintenance AN/TRC 170 Training 36

System Monitoring – Alarms Maintenance AN/TRC 170 Training 37

System Monitoring – HPA • • • Alarm Matrix Summary Alarm LED Low Power Alarm Need Picture of Alarm Matrix with door open Maintenance AN/TRC 170 Training 38

System Monitoring – Troposcatter Up-Converter Summary Alarm Maintenance AN/TRC 170 Training 39

System Monitoring – Troposcatter Down-Converter Summary Alarm Maintenance AN/TRC 170 Training 40

System Monitoring – Dual RF Synthesizer Summary Alarm Maintenance AN/TRC 170 Training 41

System Monitoring – CS 6716 Modem • Major Alarm • Minor Alarm Maintenance AN/TRC 170 Training 42

System Monitoring – CS 6716 Modem LED Display - Alarm Indications MAJOR ALARM = A Major alarm exists within the modem MINOR ALARM = A Minor alarm exists within the modem DIAGNOSTICS = Modem is configured in a diagnostic mode MANUAL SWITCH = Automatic redundancy switching has been disabled Maintenance AN/TRC 170 Training 43

System Monitoring – CS 6716 Modem Front Panel and Fan Front Panel Fan Maintenance AN/TRC 170 Training 44

System Monitoring – Versa. Mux 4000 Main Menu: Alarm-Status • Displays active alarms, refer to table 5 -1 of Versa. Mux manual for info Maintenance AN/TRC 170 Training 45

System Monitoring – Versa. Mux 4000 AGGR LED • Red indicates faults in the aggregate • Yellow indicates AGGR is in loopback Maintenance AN/TRC 170 Training 46

System Monitoring – Versa. Mux 4000 CLK REF LED • Red indicates loss of sync with timing reference Maintenance AN/TRC 170 Training 47

System Monitoring – Versa. Mux 4000 PORTS LED • Red indicates fault on one or more port cards • Yellow indicates one or more port cards in loopback Maintenance AN/TRC 170 Training 48

System Monitoring – Versa. Mux 4000 FAULT LED • Red indicates one or more faults on Versa. Mux or the unit is in hot-swap mode Maintenance AN/TRC 170 Training 49

System Monitoring – OAC-170 D Alarm LEDs • • Alarm LED OSC A Alarm LED OSC B Alarm LED MAINT LED Alarm LED Maintenance OSC A Alarm LED OSC B MAINT Alarm LED AN/TRC 170 Training 50

System Monitoring – 48 VDC Power Supply Front panel alarm indicator Maintenance AN/TRC 170 Training 51

System Monitoring – Loopbacks • • • CS 6716 Modem Versa. Mux 4000 DAR Modem Maintenance AN/TRC 170 Training 52

Loopbacks – CS 6716 Modem Internal IF loop • Quick verification of proper modem operation • From the top level menu • • • Select DIAG Then LOOPBACK Then LOCAL IF • The modem should synchronize • RX SYNC LED should illuminate green • MAJOR ALARM LED should be off Maintenance AN/TRC 170 Training 53

Loopbacks – Versa. Mux 4000 • • • Port 1 Port 2 Port 3 Port 4 Aggregate (Port 5) Maintenance AN/TRC 170 Training 54

Loopbacks – Versa. Mux 4000 • • No Loop Bi-directional Internal External Maintenance AN/TRC 170 Training 55

Loopbacks – Internal Loopback Diagram for a Port Module Internal Loopback Diagram for an Aggregate Module Maintenance AN/TRC 170 Training 56

Loopbacks – External Loopback Diagram for a Port Module External Loopback Diagram for an Aggregate Module Maintenance AN/TRC 170 Training 57

Loopbacks – DAR Modem IF Loopback Panel Attenuation settings Maintenance AN/TRC 170 Training Loopback switches 58

System Monitoring – Bit Error Rate (BER) Checks • • • CS 6716 Modem Versa. Mux 4000 DAR Modem Maintenance AN/TRC 170 Training 59

BER Checks – CS 6716 Modem Bit Error Rate Tester (BERT) • Automatically enabled based on Service Channel bandwidth • View Local & Remote • Reset Local & Remote Maintenance AN/TRC 170 Training 60

BER Checks – Versa. Mux 4000 Bit Error Rate Tester (BERT) • The Versa. Mux is equipped with an internal Bit Error Rate Tester. • This is capable of providing link quality statistics. • Only one slot (aggregate or port) may be connected to the BERT at any given time. Maintenance AN/TRC 170 Training 61

BER Checks – DAR Tropo Modem BER Meter Maintenance AN/TRC 170 Training 62

Questions? Maintenance AN/TRC 170 Training 63