Hewlett Packard 204C Generator
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Model:
204C
Date:
1968
Category:
Group:
Description:
Oscillator
Information
The Model 204C is a stable signal source that produces sine
wave frequencies between 5 Hz and 1. 2 MHz in six ranges.
The output level is variable from 0 to 5 volts rms from a
constant 600 ohm source. When working into a 600 ohm load,
the maximum output level is 2. 5 volts rms.
1-7. A SYNC feature is included in the Model 204C, The SYNC
jack on the front panel provides an output sync voltage of
1. 7 V rms, or accepts an external signal to synchronize the
oscillator. This feature permits several oscillators to be
synchronized to the same frequency or harmonics thereof.
1-8. The output of the Model 204C may be isolated from the
cabinet. This floating output is balanced to better than 40
dB below 200 kHz with an isolated, battery operated
instrument, or better than 40 dB below 20 kHz with an
instrument having an ac line connection.
1-9. The standard Model 204C contains an ac Power supply
that can be operated from 115/230 volts ac, 50 to 400 Hz.
The instrument is also available with a mercury battery
Power supply as an Option 01, or with a rechargeable nickel
cadmium battery Power supply as an Option 02. The various
power supplies can easily be interchanged by removing the
instrument covers, unplugging one supply and plugging
another in its place.
Manual type:
Service and User Manual
Pages:
58
Size:
4.23 Mbytes (4437855 Bytes)
Language:
english
Revision:
Manual ID:
00204-90000
Date:
1968 01 01
Quality:
Scanned document, reading partly badly, partly not readable.
Upload date:
2017 12 31
MD5:
37dbadd22cb1c56893d1277190c262ec
Downloads:
413
Information
. ... 1-2
1-14. Instrument/Manual Identification ... ... 1-2
Section Page
II INSTALLATION ... ... 2-1
2-1. Introduction ... ... 2-1
2-3. Initial Inspection ... ... 2-1
2-5. Power Requirements ... ... 2-1
2-8. Grounding Requirements . ... . ... 2-1
2-11. Installation ... ... 2-2
2-15. Rack Mounting. ... ... 2-2
2-17. Combination Mounting ... ... 2-2
2-19. Repackaging for Shipment ... ... 2-2
Section Page
III OPERATING INSTRUCTIONS . ... ... 3-1
3-1. Introduction ... ... 3-1
3-3. Instrument Description ... . ... 3-1
3-5. Turn-on Procedure ... ... 3-1
3-7. Operating Considerations ... ... 3-1
3-8. Floating Output ... ... 3-1
3-13. Low Distortion ... ... 3-4
3-15. Batterv Duration . ... ... 3-4
3-16. Rechargeable Battery Operation ... ... 3-4
3-22. Recharging Nickel-Cadmium Batteries ... ... 3-5
3-29. Cycle-life of Nickel Cadmium Batteries ... ... 3-6
Section Page
IV PRINCIPLES OF OPERATION . ... ... 4-1
4-1. Introduction ... . . ... 4-1
4-3. Block Diagram Description ... ... 4-1
4-4. Bridge and Amplifier ... ... 4-1
4-10. Peak Comparator . ... ... 4-2
4-12. AGC ...
4-14. 600 Ohm Attenuator ... 4-2
5-1. Introduction ... ... 5-1
5-6. Dial Accuracy Check ... ... 5-1
5-7. Flatness Check ... ... 5-2
5-8. Distortion Check ... ... 5-4
5-9. Output Voltage and Impedance Check . . . ... 5-5
5-10. Output Control Check. . ... . . ... 5-6
5-11. Sync Output Check . . ... , ... 5-6
5-12. Sync Input Check ... ... 5-6
5-13. Balance Check ... ... 5-7
5-14. Hum and Noise Check ... ... 5-7
5-15. Adjustment and Calibration Procedures . . . ... 5-9
5-16. Introduction ... ... ... 5-9
5-19. Power Supply ... . . ... 5-9
5-21. Bias Adjustment ... ... 5-9
5-22. AGC Adjustment ... . ... 5-9
b-23. AGC and Frequency Adjustment ... ... b-9
5-24. High Frequency Adjustment ... ...
5-10
5-25. Distortion Adjustment ... . ... 5-10
5-26. Troubleshooting Procedure ... ... 5-10
Section Page
VI REPLACEABLE PARTS ... ... . 6-1
6-1. Introduction ... ... 6-1
6-4. Ordering Information ... ... 6-1
6-6. Non-Listed Parts ... ... 6-1
7-1. Introduction ... ... 7-1
7-3, Schematic Diagrams ... ... . c-» -
... ... 7-1
7-5. Component Location Diagrams ... 7-1
Appendix