Hewlett Packard 620B Generator
Fabrikant:
Model:
620B
Datum:
1980
Categorie:
Groep:
Omschrijving:
SHF Signal generator

Informatie

DESCRIPTION. 1-2. The Hewlett-Packard Models 618C.620B SHF Signal Generators (Figure 1-1) provide RF signal output in the frequency ranges of 3800 to 7600 MHz, and 7000 to 11,000 MHz respectively. At least 1-mW power output is available over the entire frequency range. The output frequency is indicated on a direct-reading dial. The RF output power is adjustable by an attenuator that is calibrated in µV and dB. 1-3. Five types of modulation are available: internal pulse modulation, external pulse modulation, internal frequency modulation, external frequency modulation, and internal square-wave modulation. 1-4. The internal pulse modulation has a variable repetition rate of 40 to 4, 000 Hz. Pulse width is variable from 0. 5 to 10 us as measured at the pulse 50% amplitude points. Internal square wave modulation is variable from 40 to 4,000 Hz. 1-5. The Signal Generator can be modulated by external pulses of positive or negative polarity. The amplitude of the modulating pulses may be 20 to 70V, and the pulse width between 0.5 and 2500 µs. 1-6. Internal frequency modulation comprises a sawtooth sweep rate of 40 to 4,000 Hz. Frequency deviation is variable from 0 to 5 MHz over most of the band. External frequency modulation from an external sine wave is provided. Frequency deviation is approximately 5 MHz. 1-7. Synchronization outputs of the Signal Generator comprise two types: delayed, and undelayed. The delayed synchronization output is a positive pulse that occurs simultaneous with the RF pulse. The pulse has an amplitude of 25 V minimum and a rise time less than 1 µs when terminated in a load of 1000 ohms or more. The undelayed synchronization pulse has the same characteristics as the delayed pulse, except the pulse occurs between 3 to 300 µs (as adjusted by front-panel control) before the RF pulse. 1-8. Both the pulse- and frequency-modulated RF output may be synchronized with the following externally generated signals: sine waves of 40 to 4, 000 Hz, and 5 to 50V amplitude; pulses of 40 to 4,000 Hz, a peak amplitude of 5 to 50V, a rise time of 0.1 to 1 µs, and a width of 0.5 to 5 µs.

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Service-en gebruikershandleiding
Handleidingen type:
Service-en gebruikershandleiding
Pagina’s:
138
Grootte:
6.15 Mbytes (6445201 Bytes)
Taal:
english
Herziening:
Handleidingen-ID:
00618-90029
Datum:
01 april 1980
Kwaliteit:
Gescand document alle leesbaar.
Upload datum:
30 december 2017
MD5:
d202116362c920aa9e87e1cc80581ed3
Downloads:
217

Informatie

I GENERAL INFORMATION ... 1-1 1-1. Description ... 1-1 1-9. Instrument Identification ... 1-1 II INSTALLATION ... 2-1 2-1. Incoming Inspection ... 2-1 2-3. Preparation for Use ... 2-1 2-4. Power Requirements ... 2-1 2-6. 115/230 Volt Operation ... 2-1 2-9. Power Cable ... 2-1 2-12. Cooling ... 2-1 2-14. Air Filter ... 2-1 2-16. Repacking for Shipment ... 2-1 in OPERATION ... 3-1 3-1. Introduction ... 3-1 3-3. General Operating Information . . 3-1 3-7. Controls. Connectors and Indicators ... 3-1 3-10. Turn On ... 3-1 3-11. Detailed Operating Procedures ... 3-1 3-13. Operation with the Dymec DY-2650A Oscillator Synchronizer ... 3-1 IV PRINCIPLES OF OPERATION ... 4-1 4-1. Introduction ... 4-1 4-3. The Modulator Section ... 4-1 4-41. The RF Oscillator ... 4-9 4-87. The Power Monitor ... 4-14 4-91. The Power Supplies ... 4-15 4-92. General Operating Principles ... 4-15 4-96. -300 Volt Supply ... 4-16 4-98. -1000 Volt Supply ... 4-16 4-100. -1550 Volt Supply ... 4-16 V MAINTENANCE ... 5-1 5-1. Introduction ... 5-1 5-4. Periodic Inspection ... 5-1 5-5. Cleaning ... 5-1 5-7. Lubrication ... 5-1 5-9. Performance Tests ... 5-1 5-10. Purpose ... 5-1 5-12. Test Equipment Required . . . 5-1 5-14. RF Power-Output Accuracy Check ... 5-1 5-15. Frequency Accuracy. Stability, and aFM Check ... 5-1 5-16. Uncalibrated RF Output Check ... 5-2 5-17. Internal Pulse-Modulation Check ... 5-2 Section Page 5-18. Internal Square-Wave Modulation Check ... 5-2 5-19. External Pulse Check ... 5-3 5-20. Internal FM Check ... 5-4 5-21. External FM Check ... 5-4 5-22. External Sine-Wave Synchronization Check . . . 5-4 5-23. External Pulse Synchronization Check . . . 5-4 5-24. Adjustments ... 5-5 5-25. Test Equipment Required . . 5-5 5-27. Power-Supply Voltage Adjustments ... 5-5 5-29. Adjustments Following Replacement of Klystron V114 (618C, ... 5-6 5-31. Adjustments Following Replacement of Klystron V114 (620B, ... 5-7 5-33. Calibrating the Frequency Dial (618C, ... 5-9 5-35. Calibrating the Frequency Dial (620B, ... 5-10 5-37. Calibrating the Pulse Rate Control ... 5-11 5-39. Calibrating the Pulse Delay Control ... 5-11 5-41. Calibrating the Pulse Width Control ... 5-11 5-43. Power Set Meter Adjustments ... 5-12 5-46. Troubleshooting ... 5-12 5-47. Test Equipment Required . . 5-12 5-49. Isolating a Trouble to a Circuit Section ... 5-12 5-66. Isolating Trouble in Transistor Circuits ... 5-14 5-68. In-Circuit Testing ... 5-14 5-71. Testing Transistor s with an Ohmmeter ... 5-14 5-73. Klystron Removal (618C, ... 5-14 5-75. Klystron Replacement (618C, . . 5-16 5-77. Klystron Removal (620B, ... 5-17 5-79. Klystron Replacement (620B, . . 5-17 5-80. Replacing Repeller Tracking Potentiometer ... 5-18 5-82. Replacing and Recalibrating the Alternator (618C, ... 5-19 5-85. Replacing the Attenuator Probe (618C, ... 5-19 5-87. Recalibrating the Attenuator ... 5-19 5-88. Replacing and Recalibrating the Attenuator (620B, ... 5-20 5-90. Replacing the Attenuator Probe (620B, ... 5-20 5-92. Recalibrating the Attenuator (620B, ... 5-21 5-94. Tube and Semiconductor Replacement ... 5-21 5-96. Etched Circuits ... 5-21 5-98. Component Replacement ... 5-22 5-101. Transistor and Semiconductor Diode Replacement ... 5-23 5-102. Q601. Q602 Lead Identification. . 5-23 VI REPLACEABLE PARTS ... 6-1 6-1. Information ... 6-1 6-3. Ordering Information ... 6-1 APPENDIX I SHF SIGNAL Generator .. 1-1 APPENDIX II MANUAL CHANGES ... 11-1

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