Equipment information

Hewlett Packard 1200A Oscilloscope
Manufacturer
Hewlett Packard
Model 1200A
Date 1976
Category Measurement instruments
Group Oscilloscope
Description Dual Trace Oscilloscope
Information
                                    Hewlett-Packard Models 1200A and 1200B Dual Trace
Oscilloscopes are electrically identical, general purpose
instruments. Model 1200A is a cabinet version with a
built-in tilt stand, convenient carrying handle on top, and
feet mounted on both bottom and rear for either bench or
upright operation. Designed primarily for rack mounting, the
Model 1200H uses only 5-1/4 vertical inches of rack space
and has front panel handles for portability.

Since all circuitry is solid state, power consumption is
only about 50 watts, and a cooling fan is not needed. 

These manuals are available for the above equipment:

Manual Type Service and User Manual HewlettPackard-10055-Manual-Page-1-Picture
Pages 112
Size 6.32 Mbytes (6628328 Bytes)
Language english
Revision
Manual-ID/Number 01200-90904
Date 01 November 1976
Quality Scanned document, reading partly badly, partly not readable.
Upload date
MD5 61a9cc60ad5aee2c897442abb02bc1b4
Downloads 193 since 30 December 2017
Information
C.ENKRAL INFORMATION
I-lJ	Introduction ... 

1-3.	Instrument Description  ... 

1-5.	General ... * — * ... 

1-8,	Vertical Circuits ... 

1-13,	Horizontal Circuits ... 

1-19, 1	Options, ... 

1-21.	Instruments Covered by Manual ..

II	INSTALLATION ... 

2-1.	Introduction ... 

2-3.	Initial Inspection ... 

2-5.	Powpr Cords and Receptacles ... 

2-7.	Power Requirements  ... 

2-10.	Repacking for Shipment  ... 

III	OPERATION ... 

3*1. Introduction  ... 

3*3.	Controls and Connectors	.

3-23.	Operating Instructions ... 

3-25.	Applying Input Signals ... 

3-27.	Trigger Signal Requirements —

3-30.	Operating Procedures ... 

IV	PRINCIPLES OF OPERATION ... 

<1-1.	Introduction  ...  I ... 

4-3.	General Theory ... 

4-13.	Horizontal Module ... 

4-25.	Output Module ... 

4*34.	Power Supply Modules ... 

4-37.	Detailed Circuit Theory  ... 

4-53.	Horizontal Module ... 

4-94.	Output Module ... 

4-113.	Power Supply Modules ... 

V	PERFORMANCE CHECK AND

ADJUSTMENTS ... 

5-1.	Introduction ... 

5-3.	Test Equipment ... 

5-5.	Performance Check and

Adjustments ... 

5-9.	Preliminary Control Settings____

5-10.	Preliminary Checks ... 

5-12.	Intensity ... 

5-13. Focus ... 

5-14.	Trace Align ... 

5-15.	Amplifier Balance ... 

5-16.	Vertical Positioning ... 

5-17.	Beam Finder ... 
5-18.	Performance Check Procedure ... 

5-19.	Vertical Amplifier Gain ... 

5-20.	Calibrator ... 

5-21.	Vertical Bandwidth ... 

5-22.	Noise ... 

5-23.	Common Mode Rejection Ratio ..

5-24.	A vs B Phase Shift ... 

5-25.	Channel Isolation ... 

5*26.	Trigger Amplitude ... 

5-27.	Trigger Point and Slope ... 

5-28.	Sweep Time ... 

5-29. Sweep Vernier  ... 

5-30.	Magnified Sweep ... 

5-31.	Single Sweep ... 

5-32.	Horizontal Amplifier Gain ... 

5*33.	Horizontal Vernier ... 

5-34.	Horizontal Bandwidth ... 

5*35.	Adjustment Procedure ... 

5-39.	Preliminary Setup ... 

5-41.	Low Voltage Power supply ... 

5-42.	High Voltage Power supply ... 

5-43. Astigmatism ... 

5-44.	Intensity Limit  ... 

5-45.	Horizontal Gain  ... 

5-46.	Horizontal Vernier Balance ... 

5*47.	Horizontal Attenuator

Compensation ... 

5-48.	Auto Triggering ... 

5-49.	Horizontal Positions

Centering ... 

5-5Ö.	Magnifier Centering ... 

5-51.	Sweep Time Calibration ... 

5-52.	Vertical Vernier and Vertical

Amplifier Balance ... 

5-53.	Output Amplifier Gain ... 

5-54.	Input Capacitance and

Attenuator Compensation____

5-55.	CMRR Balance ... 

rI REPLACEABLE PARTS ... 1 ... 

6-1.	Introduction ... 

6-3. Ordering Information ... 

6-6.	Direct Mail Order System ... 

II	MANUAL CHANGES ... 

! 7*1. Introductions ... 

7-3.	Manual Changes ... 

7-5. Option 006 ... 

III	SCHEMATICS AND

TROUBLESHOOTING ... 
8-1. Introduction ... 

8-3. , Schematics  ... 

8-10. Component Location
8*13. Troubleshooting ... 

8-in. Fro nt-pa net Controls ... 

8-17. Per forma net: Cheek ... 

8-19. Troubleshooting Table ... 

8-26. Visual Chec’s ... 

8-28. Waveforms and Voltages ... 

8-33. Final Cheeks  ... 

8-35. Repair and Replacement ... 

8-37.	Servicing Etched Circuit lizards.

LIST C

Figure	Title	]

2-1. Model 1200A Power Cable

Configurations ... 

2*2. Model 12Ü0B Power Cable

Configurations • ... 

3*1. Controls and Connectors  ... „

.7-2. Bandwidth Upper Limit vs Selected

Capacitance ... 

4-1. Channel A Attenuator and Preamplifier

Block Diagram ... 

•1-2. Horizontal Preamplifier Block

Diagram ...  —

•1-3. Trigger Generator and Horizontal

Amplifier Block Diagram ... 

4-I. Sweep Generator Block Diagram ... 

4*5. Multivibrator Block Diagram ... 

•1-6. Output Amplifier Block Diagram ... 

•1-7. Regulated Power supply Block

Diagram ... , ... 

•1-8. I,ow Voltage Power supply Block

Diagram ...  —

4-9. High Voltage Power supply Block

Diagram ... 

4-10.	Overall Block Diagram ... 

5-1.	, Low Voltage Power supply

Adjustment ... 

5-2* High Voltage Power supply

Adjustments ...   ... 

5-3. Horizontal Module Adjustments ... 

5-1. Vertical Preamplifier Module

Adjustments ... 

5-5. Dual Channel Output Amplifier

Adjustments ... 

7-1. TI Primary Circuits ... 

7-2. I,ow Voltage Power Supply, A5,

Component Identification ... 

7*3. High Voltage Regulator, A6,

Component Identification ... 

7*4. Option 006, Schematic Connection  ... 
8-39. Semiconductor Replacement ...  8-12. CRT Removal and

Replacement ... 

8-45. Vertical Preamplifier Module

Removal and Replacement  ...  8-48. Horizontal Module Removal

and Replacement ... 

8-51. Dual Channel Output Board

Removal and Replacement —

5TRATIONS

Figure	Title	I

8-1. Semiconductor Identification .  ... 

8-2. Model I200B Bottom View ... 

8-3. Model 1200A Top View ... 

8-4. Model 1200A Bottom View — ... 

8-5. Model 1200A Exploded View  ... 

8-6. Model 1200B Exploded View ... 

8-7. 100 j^V Preamplifier Module, Al,

Component Identification ... 

8-8. Volts/Division Switch, A1A2,

Componei.t Identification ... 

8-9. Vertical Preamplifier, AlAl,

Component Identification ... 

8*10. Channel A Attenuator and Preamplifier

Block Diagram ... 

8-11. Channel A Preamplifier Module Measurement Conditions and

Waveforms  ... 

8-l*>. Channel A Preamplifier Modulo

Schematic ... 

8-13. 100 ^V Preamplifier Module,1 A2,

Component Identification ... 

8*14. Volts/Division Switch, A2A2,

Component Identification ... 

8-15. Vertical Preamplifier, A2A 1,

Component Identification ... 

8-16. Channel B Attenuator and Preamplifier

Block Diagram ... 

8-17. Channel B Preamplifier Module Measurement Conditions and

Waveforms  ... 

8*18. Channel B Preamplifier Module

Schematic  ... 

8*19. Dual Channel Output Amplifier, A3,

Component Identification ... 

8-20. Dual Channel Output Amplifier

Block Diagram ... 

8-21. I)uj1 Channel Output Amplifier

Waveforms ... 

8*22. Dual Channel Output Amplifier

Schematic ...  i

8*23. Multivibrator, A3, Component

Identification ...  i
HewlettPackard-10055-Manual-Page-1-Picture


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