Contents
xi
Functional Block Descriptions .......................................................................................... 130
Instrument Control Block ............................................................................................... 133
Reference Oscillator/RF chain Block ............................................................................. 137
Cesium Beam Tube Block .............................................................................................. 139
Analog Signal Chain Block ............................................................................................ 141
Input/Output Block ......................................................................................................... 143
Power Supply Block ....................................................................................................... 144
A1 Motherboard Circuit Description .............................................................................. 146
A11 Power Steering Logic Assembly............................................................................. 147
Figure 3-8. Opt. 048, Power Supply Block Diagram...................................................... 156
A12 Dc-Dc Power Converter Module ............................................................................ 158
LF1 AC-Line Filter/Cable Assembly.............................................................................. 158
T1 Toroidal Power Transformer ..................................................................................... 158
B1 Internal-Standby Battery ........................................................................................... 158
4. Replacing Assemblies - Disassembly and Reassembly ................................................. 160
Introduction ....................................................................................................................... 160
Tools Required .................................................................................................................. 160
Do This First...................................................................................................................... 161
To Remove the Covers ...................................................................................................... 161
To remove the A2 CBT Control Assembly ....................................................................... 162
To Remove Any Other PC Boards .................................................................................... 162
To Remove A1 Motherboard Assembly ............................................................................ 162
To Remove A10 Output Frequency Distribution Amplifier Module ................................ 163
To Remove A12 Dc-Dc Power Converter Module ........................................................... 164
To Remove A13 Front Panel Module................................................................................ 165
To Remove A14 Signal Amplifier Module ....................................................................... 166
To Remove A15 9.2 GHz Microwave Generator Module................................................. 167
To Remove A16 High Voltage Supply Module ................................................................ 167
To Remove A17 CBT Assembly ....................................................................................... 168
Preparation ...................................................................................................................... 168
10890A or 10891A CBT Removal ................................................................................. 168
CBT Installation.............................................................................................................. 169
Operation Verification .................................................................................................... 171
Disposal Procedure for Symmetricom Cesium Beam Tubes .......................................... 172
To Remove A19 Reference Oscillator Module ................................................................. 173
Summary of Contents for 5071A
Page 2: ......
Page 40: ...1 Performance Tests Verifying Specifications 5071A Complete Performance Tests 24 ...
Page 48: ...2 Service Pre Troubleshooting Information 32 Figure 2 1 Instrument Top View ...
Page 168: ...3 Theory of Operation Functional Block Descriptions 152 Figure 3 5 Power Supply Block Diagram ...
Page 173: ......
Page 194: ...5 Replaceable Parts How To Order A Part 178 ...
Page 197: ......