Symmetricom 5071A Assembly And Service Manual

Index
184
overall block diagram 131
overvoltage protection circuit 146
power supply block 144
reference oscillator rf-chain block 137
simplified functional description 126, 127
analog-signal chain block 129
cesium beam tube block 128
input/output block 129
instrument control block 128
power supply block 129
reference oscillator/rf-chain block 128
T1 toroidal power transformer 146, 158
Tools required for repair 160
Tools, special 5
Top-level diagnostic tree 37
Top-level diagnostic tree organization 35
Troubleshooting
1PPS assembly 80 MHz input test 45
A1 fault 70
A10 1 MHz output test 105
A10 100-kHz output test 106
A10 J5 80 MHz input test 101
A10 output port-1 test 102
A10 port-1 frequency error (10, not 5 MHz) 102
A10 port-1 frequency error (5, not 10 MHz) 103
A10 port-1 frequency selection error test 103
A10 port-2 frequency error (10, not 5 MHz) 104
A10 port-2 frequency error (5, not 10 MHz) 104
A10 port-2 frequency selection error test 104, 105
A10 port-2 test 104
A10 power checks 101
A10 SEL-A line test 103
A10 SEL-B line test 105
A10, A9J2-to-A10J5 cable test 102
A11 F1 fuse fault 73
A11/A11 cable test 68
A11/A11-A1 cables test 68
A11P101 connection test 70
A12 module test 71
A12 power input test 67
A15 +4.5V power cable test 107
A15 320-MHz signal test 108
A15 power check 107
A15, A15J1 power-level check 110
A15, A15J2 frequency-range test 110
A15, A15J3 signal test 108
A15, A15J5 signal test 109
A15, A15J5-CBT cable test 109
A15, A18J3 voltage test 107
A16 electron multiplier high-voltage supply test114
A16 electron multiplier supply control current test
115
A16 ion pump current monitor diagnosis 113
A16 ion pump high-voltage supply test 111
A16 ion pump return current test 112
A16 ion pump return current zero test 112
A16 preliminary set-up 111
A16/CBT excess ion-pump current test 52
A18 mon voltage test 119
A18 average mon voltage test 119
A18 mon signal ac-content test 119
A18 power check 116
A18, A15 +4.5V test 118
A18, A15 320 MHz input test 118
A18, A15 70-110 MHz input test 117
A18, A15J3 and A18J4 cable test 117
A18, A18J3 dc-voltage test 118
A18, A18J3 to A15/+4.5V cable test 118
A18, A18J4 signal input test 119
A18, A5 87.368230 MHz input signal test 116
A18, A5 87.368230-MHz input cable test 117
A19 EFC voltage test (1) 122
A19 EFC voltage test (2) 123
A19 loaded power-supply voltages 121
A19 oven warm-up time test 123
A19 power fault 121
A19 signal-amplitude test 123
A19 signal-frequency test 124
A19 VCXO set-point adjustment 124
A19, A6 unloaded A19-power-supply voltages 120
A19, A6J4.1 and A6J4.9. reference voltage test 122
A1C4 voltage test procedure 59
A1CR3 bridge rectifier test 68
A2 CBT controller
cesium oven monitor test (+ current on) 91
cesium oven monitor test (current off) 90
cesium oven monitor test (-current on) 91
cesium oven-to-ground test 90
cesium-oven resistance tree 90
hot-wire monitor test (current on) 85
hot-wire monitor test (no-current) 84
hot-wire resistance test 84
hot-wire resistance to ground test 84
mass-spectrometer monitor test (- current on)
89
mass-spectrometer resistance test 88
mass-spectrometer test (+ current on) 88
mass-spectrometer test (current off) 88
thermintor monitor test 1 (current on) 87
thermistor ground test 86
thermistor monitor test (no current) 86
thermistor monitor test 2 (current on) 87
thermistor resistance test 86
A2 CBT controller diagnostic tree 83
A2 CBT controller pinouts 83
A5 80 MHz signal test 92
A5 mon signal test 93
A5 power-supply tests 92
A5, A4 131.770 kHz signal test 93
A5, A9J3 80 MHz signal cable test 93
A5, J101 87.36823 MHz signal test 94
A8 1 MHz output signal loading test 96
A8 1 MHz output signal test 95
A8 1 MHz waveform voltage/frequency test 96

Symmetricom 5071A Specifications

General

Brand	Symmetricom
Model	5071A
Category	Measuring Instruments
Language	English