Spectracom 8161 Ricevitore
Produttore:
Modello:
8161
Data:
1993
Categoria:
Gruppo:
Descrizione:
WWVB RECEIVER/FREQUENCY STANDARD

Informazioni

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 oscillators and standards can be also compared against the 60 kHz WWVB signal. An optional built-in distribution Amplifier sends 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 clocks and other timekeeping equipment.

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Servizio e manuale utente
Tipo di manuale:
Servizio e manuale utente
Pagine:
137
Dimensione:
4.85 Mbytes (5087476 Bytes)
Lingua:
english
Revisione:
2.1
ID del manuale:
Data:
1993 08 20
Qualità:
Documento scansionato, tutto leggibile.
Data caricamento:
2017 08 20
MD5:
4a481212b6a5c17311383109a0122ff8
Scaricamenti:
609

Informazioni

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 Receivers ... 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 ... PARTS LIST

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