Hewlett Packard 608C Generator
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Model:
608C
Date:
1954
Category:
Group:
Description:
VHF Signal Generator
Information
The Hewlett-Packard Model 608C VHF Signal Generator is a
general purpose test instrument which furnishes accurately
adjustable r-f signals from 0.1 microvolt to 1 volt over the
frequency range from 10 to 480 megacycles. The output signal
may be amplitude modulated by internally generated sine
waves or by externally applied sine waves or pulses. The
output signal level is adjustable by an attenuator
calibrated in both volts and dbm and can be read directly to
an accuracy of ±1 db over the full frequency and attenuation
range without the use of external pads, monitoring devices,
or charts. The 608C features a very wide frequency range,
high output, and straightforward operation through the use
of reliable, direct-reading controls and meters.
The Model 608C Signal Generator is designed for general
applications in the 10- to 480-megacycle frequency range,
such as testing, calibrating, and trouble shooting VHF radio
equipment and circuits. In conjunction with other test
equipment, the 608C is useful for measuring standing wave
ratios, antenna and transmission line characteristics,
receiver sensitivity, etc. To obtain best accuracy in these
applications, care has been taken to hold spurious
modulation from the Generator to a very low value.
Manual type:
Service and User Manual
Pages:
73
Size:
10.80 Mbytes (11321992 Bytes)
Language:
english
Revision:
Manual ID:
00390-1
Date:
1961 01 01
Quality:
Scanned document, reading partly badly, partly not readable.
Upload date:
2017 12 30
MD5:
3c0ed907ced6eb42b1f9a6fde0791bdf
Downloads:
653
Information
SECTION I GENERAL DESCRIPTION
1-1 Introductory ... I - 1
1-2 Auxiliary Equipment ... 1-1
1-3 General Electrical Characteristics ... 1-1
1-4 Supply Voltage ... 1-2
1-5 Power Cable ... I - 2
1-6 Physical Description ... 1-2
1-7 Inspection ... I - 2
SECTION H INSTALLATION AND OPERATION
2-1 Introductory ... II - 1
2-2 General ... II - 1
2-3 Installation ... II - 1
2-4 Operating Controls, Dials, and Terminals ... II - 1
2-5 Turning On the Equipment ... II - 1
2-6 Continuous Wave Operation ... II - 3
2-7 Internal Sine Wave
Modulation ... II - 4
2-8 External Sine Wave Modulation ... II - 4
2-9 Pulse Modulation ... II - 5
2-10 Signal Generator Loading
Considerations ... II - 5
2-11 Considerations for Pulse-Modulated R-F
Output ... II - 6
SECTION HI THEORY OF OPERATION
3-1 General ... HI - 1
3-2 R-F Generator Assembly ... ni - 3
3-3 Radio Frequency
Oscillator ... Ill - 3
3-4 Radio Frequency Power Amplifier ... HI - 5
3-5 Output Attenuator and R-F Power Monitor ... IE - 6
3-6 Modulator Section ... U3 - 7
3-7 Modulation-Measuring Circuits ... IH - 9
3-8 Power supply ... Ill - 11
3-9 Heater Supply
Multivibrator ... IH - 12
SECTION IV MAINTENANCE
4-1 Introduction ... TV - 1
4-2 Cabinet Removal ... IV - 1
4-3 Periodic Checks and Routine Care ... IV-1
4-4 Test Equipment and Special Tools
Required ... IV - 3
4-5 Localizing Trouble ... IV - 4
4-6 Replacement of Electron Tubes ... IV-4
4-7 Radio Frequency Oscillator Tube Replacement ... IV - 5
4-8 Radio Frequency Amplifier Tube Replacement ... IV - 5
4-9 Replacement of Electron Tubes within the
Regulated Power Supplies ... IV-7
4-10 Attenuator Probe Replacement ... IV-7
4-11 Replacement of Lamp II ... IV - 10
4-12 Calibration of the Percent Modulation
Meter ... IV - 10
4-13 Output Volts Meter Calibration and R-F Power
Monitor Service ... IV - 11
4-14 Trouble Shooting
Chart ... IV - 13
Manual type:
Service Manual
Pages:
10
Size:
1.09 Mbytes (1147842 Bytes)
Language:
english
Revision:
Manual ID:
Date:
Quality:
Scanned document, reading partly badly, partly not readable.
Upload date:
2017 12 30
MD5:
ef8d9c8c6179ca99bc7510c1835fba02
Downloads:
1952
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.