Hewlett Packard 608D Generator
Manufacturer:
Model:
608D
Date:
1962
Class:
Type:
SubType:
VHF Signal Generator
Information
Model
608D VHF Signal
Generator furnishes r-f signals from
0. 1 microvolt to 0. 5 volt over the frequency range from 10
to 420 megacycles. The signals may be amplitude-modulated by
internally-generated sine waves or by externally-applied
sine waves or pulses.
The level of the output signal is regulated by an attenuator
which is adjusted by a calibrated front-panel control. The
attenuator is calibrated in both volts and dbm and can be
read directly to an accuracy of ±1 db over the full
frequency range when the
608D is terminated in a 50-ohm
resistive load.
The
608D includes a crystal-controlled heterodyne
Calibrator
which permits the operator to adjust the calibration of the
frequency dial at 1-mc and 5-mc check points over the
frequency range of the instrument.
The Model
608D Signal
Generator is designed to meet the
exacting requirements of precision laboratory work and yet
to be equally useful for general applications in the 10- to
420-megacycle frequency range. The equipment can be used for
testing, calibrating, and trouble shooting VHF radio
equipment and circuits, and for measuring standing-wave
ratios, antenna and transmission line characteristics,
receiver sensitivity, etc. To obtain utmost accuracy,
particular care has been taken in the design of the
608D to
hold spurious modulation to a very low value under all
operation conditions.
Manual type:
Service Manual
Pages:
10
Size:
1.09 Mbytes (1147842 Bytes)
Language:
english
Revision:
Manual-ID:
Date:
unknown
Quality:
Scanned document, reading partly badly, partly not readable.
Upload date:
2017 12 30
MD5:
ef8d9c8c6179ca99bc7510c1835fba02
Downloads:
1977
Information
Service Notes
This Service Note contains information necessary for
replacing and recalibrating the output attenuator in the
608A/B/C/D/E/F Signal Generators. The procedure is described
for each model, using the appropriate replacement attenuator.
This Service Note outlines the procedure for modifying the
Model
608C.D VHF Signal Generators for regulated DC filament
operation of the RF circuits.
The original multivibrator filament
Power supply in Some
cases caused ripple on the output RF signal from the
generator. The DC filament supply prevents this from happening.
Manual type:
Service and User Manual
Pages:
76
Size:
4.73 Mbytes (4954648 Bytes)
Language:
english
Revision:
Manual-ID:
Date:
1962 12 01
Quality:
Scanned document, reading partly badly, partly not readable.
Upload date:
2017 12 30
MD5:
3d37b6a4047b7356ff2be895ddef4bb8
Downloads:
401
Information
I GENERAL DESCRIPTION ... 1-1
1-1. Introductory ... 1-1
1-2. General Electrical Characteristics • 1-1
n INSTALLATION AND OPERATION- . . .2-1
2-1. Installation ... 2-1
2-2. Mechanical Adjustment of
Meter Zero ... 2-1
2-3. Operating Controls,Dials and •
Terminals ... ^-1, ;
2-4. Turning on the Equipment ... 2-4
2-5. Continuous-Wave Operation ... 2-5
2-6. Internal Sine-Wave Modulation . . . 2-5
2-7. External Sine-Wave Modulation . . 2-5
2-8. Pulse Modulation ... 2-6
2-9. Crystal-Controlled Beat-Frequency
Calibrator ... 2-6
2-10. Signal
Generator Loading
Considerations ... 2-6
2-11. Fine Freq. Adjust. Control ... 2-8
m THEORY OF OPERATION ... 3-1
3-1. General ... 3-1
3-2. Radio Frequency
Oscillator ... 3-1
3-3. Radio Frequency Buffer ... 3-3
3-4. Radio Frequency Power
Amplifier . 3-3
3-5. Output Attenuator and R-F
Power Monitor ... 3-4
3-6. Xtal (Beat Frequency) Calibrator- • 3-4
3-7. Modulator Section ... 3-5
3-8. Modulation-Measuring Circuits . . 3-6
Section Page m THEORY OF OPERATION (Cont'd)
3-9.
Power supply ... 3-6
3-10. Heater Supply Multivibrator . . . 3-7
IV MAINTENANCE ... 4-1
4-1. Introduction ... 4-1
4-2. Cabinet Removal ... 4-1
4-3. Periodic Checks and Routine Care 4-1
4-4. Localizing Trouble ... 4-3
4-5.
Power supply Troubleshooting
and Adjustment ... 4-3
4-6. System Analysis Check Chart . . 4-3
4-7. Replacement of Electron Tubes 4-9 4-8. Radio Frequency
Oscillator
Tube Replacement ... 4-9
4-9. Radio Frequency
Amplifier and
Buffer Tube Replacement . . . 4-11 4-10. Xtal Frequency
Oscillator Tube
or Crystal Replacement ... 4-12 4-11. Replacement of Power
Supply Tubes ... 4-13
4-12. Attenuator
Probe Repair and
Replacement ... 4-14
4-13. Replacement of Lamp II ... 4-17
4-14. Calibration of Percent Modulation
Meter ... 4-17
4-15. OUTPUT VOLT Meter Calibration
and RF Power Monitor Service . 4-18
4-16.
Calibrator Oscillator Repair . . . 4-20
4-17. Troubleshooting Chart ... 4-20
V TABLE OF REPLACEABLE PARTS • . 5-1
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