Spectracom - 8161 - Receiver
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Spectracom 8161
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Equipment:
8161
Date:
1993
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Information
The Spectracom Model 8161 WWVB Receiver Oscillator is a
complete frequency calibration system containing a Receiver comparator and a high quality oven-controlled quartz
frequency standard Oscillator This standard may be
continuously monitored against the WWVB VLF carrier. A
strip-chart recorder is built into the unit to provide a
permanent record of frequency accuracy. External local Oscillator and standards can be also compared against the
60 kHz WWVB signal. An optional built-in distribution Amplifier ends the internal standard signal to a maximum of
25 remote stations so that each has its own time base
traceable to NBS. The demodulated WWVB time code output is
also available for synchronizing accurate Clock and other
timekeeping equipment.
1 Manual
Service and user manual
Manual type:
Service and user manual
Pages:
137
Size:
4.9 MB
Language:
english
Revision:
2.1
Manual-ID:
Date:
August 1993
Quality:
Scanned document, all readable.
Upload date:
Aug. 20, 2017
MD5:
4a481212-b6a5-c173-1138-3109a0122ff8
Information
SECTION 1 8161 INSTALLATION PAGE
1.0 Introduction...1-2
1.1 Unpacking...1-2
1.2 Reshipment...1-2
1.3 Antenna Location ...1-3
1.4 Antenna Installation ... 1-3
1.5 Preamplifier (Model 8207) Installation ... 1-4
1.6 Input Power...1-4
1.7 Operating Environment ... ... 1-4
1.8 Bench Operation...1-7
1.9 Rack Mount Operation...1-7
SECTION 2 OPERATION
2.0 Introduction...2-2
2.1 Initial Turn On...2-2
2.2 Signal Strength...2-2
2.3 NBS Output...2-3
2.4 Time Code Outputs...2-3
2.5 Measuring Frequency ... 2-5
2.6 WWVB Identification ...2-6
2.7 Strip Chart Recordings ... 2-6
2.8 Frequency Error Calculation ... 2-13
2.9 Front Panel Functions ... 2-16
2.10 Rear Panel Functions...2-20
ECTION 3 SPECIFICATIONS PAGE
3.0 Introduction...3-2
3.1 Receiver Comparator ...3-2
3.2 Frequency Standard Output ...3-3
3.3 Standby Supply...3-4
3.4 Strip Chart Recorder ...3-4
3.5 Mechanical and Installation ...3-5
3.6 Model 8206 Loop Ântenna...3-5
3.7 Model 8207 Preamplifier...3-5
SECTION 4 THEORY OF OPERATION
4.0 Introduction...4-2
4.1 Al, RF Amplifier P/N 001100 ...4-7
4.2 A2 Receiver Assembly, P/N 001200 ...4-10
4.2.1 Phase Locked Loop...4-10
4.2.2 A6C Loop...4-16
4.2.3 Phase Detector Balance Adjustments ... 4-17
4.2.4 Phase Comparator ...4-1/
4.2.5 Power Supplies...4-18
4.3 Standard Output Amplifier Ass'y A4, P/N 002400 . . 4-18
4.3.1 Output Drive Level ...4-18
4.4 A5 Oscillator & Power Supply Ass’y, P/N 002500 . . 4-21
4.4.1 Oscillator Control Circuitry ...4-21
4.4.2 Voltage Regulators ...4-21
4.4.3 Secondary Regulators...4-21
4.4.4 Voltage Adjustments...4-22
4.4.5 Oscillator Adjustments ...4-22
4.4.6 Line Interrupt Detector...4-22
SECTION 5 OPTIONS AND ACCESSORIES PAGE
5.0 Introduction...5-2
5.1 Option 01 Mount Rack Option...5-2
5.2 Option 02 Battery Power Supply 5-2
5.2.1 Principles of Operation...5-3
5.3 Option 03 Built-In Distribution Amplifier 5-3
5.3.0 Introduction...5-3
5.3.1 Principles of Operation...5-4
5.3.2 System Components ...5-7
5.3.2.1 Model 8140T & 8140 TTL Line Taps . . 5-7
5.3.2.2 Model 8140VT™ Frequency Synthesizer 5-8
5.3.2.3 Model 8140TA Line Extender Amplifier 5-8
5.3.3 Design of Distribution Networks ... 5-9
5.4 Option 10 50-Hz Power Line...5-13
5.5 Option 11 Rack Mount with Slides... . 5-13
5.6 Option 15 Timing Pulse Output...5-14
5.6.1 Principles of Operation...5-14
5.7 Option 16 Without Frequency Standard Oscillator 5-17
5.7.1 Option 16 Front Panel Functions ... 5-1/
5.7.2 Option 16 Rear Panel Functions...5-18
5.7.3 Initial Turn-On...5-19
5.7.4 Using the REF Output...5-20
5.7.5 Using the Phase Comparator ...5-20
5.7.6 Theory of Operation ...5-21
5.7.7 Service Information ...5-21
5.8 Option 28 1-kHz Output...5-21
5.8.1 Principles of Operation...5-22
5.9 Accessories...5-25
SECTION 6 SERVICE INFORMATION
6.0 Service Information...6-2
6.1 Calibration of WWVB Receiver 6-2
6.2 RF Amplifier Ass'y (A1 Board) Alignment Procedures 6-4
6.3 Receiver Ass'y (A2 Board) Alignment Procedures . . 6-6
6.4 Oscillator & Power Supply Ass'y (A5 Board) ... 6-10
6.5 Model 8207 Preamp Alignment...6-14
6.6 Line Tap (Model 8140T) Test Procedures...6-15 Antenna (Model 8206) Test Procedures Trouble Shooting ...
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