Equipment information:

Hickok Electrical Instrument Company 512 Amplifier
Manufacturer:
Hickok Electrical Instrument Company
Model: 512
Date:
Category: Audio, Video, TV, Multimedia
Group: Amplifier
Description: 10MHz Solid State Triggered Oscilloscope
Information:
                                    1-1 DESCRIPTION

The Hickok Oscilloscope covered by this instruction manual has been especially designed to fulfill the need for a highly stable, triggered sweep, solid state oscilloscope for general purpose industrial use. Due to many unique features, it is also ideally suited for use by television, audio and radio service technicians.

Special features of this instrument which are essential for testing and servicing modern electronic equipment are:

a.	The vertical system has dual channel amplifiers which allows two waveforms to be displayed simultaneously to compare their time or phase relationship. The two channels can be displayed separately, simultaneously or added together algebraically.

b.	Each of the two vertical channels includes a step attenuator, to provide calibrated input voltage ranges, and a variable gain control, to permit adjustment between steps or ranges. Vertical input may be either AC or DC coupled. Special circuitry provides minimal overshoot, ringing and drift in the amplifier.

c.	The horizontal amplifier system provides for either AC or DC coupled inputs and includes a variable gain control. The XI - X5 gain switch permits expanding the display for easy viewing.
d.	A digital type trigger circuit, offers very stable triggering with minimum jitter to 15MHz without the use of high frequency sync adjustments. This permits the oscilloscope to be used to full bandwidth.

e.	Calibrated sweep speeds in 18 steps with continuous adjustment between steps.

f.	Special circuitry and control settings for viewing TV horizontal lines, vertical frames and vertical interval test signals (VITS) field 1 or field 2.

g.	Overload protection on all ranges to protect the equipment from accidental application of excessive input voltage.

h.	Regulated power supply for increased stability and accuracy.

i.	Z axis blanking is provided by a Z Axis Input connector located on the back panel of the oscilloscope.

j. A trace locator circuit actuated by a momentary push switch permits rapid location of off-screen traces which may then be centered on the screen by the positioning controls,

These manuals are available for the above equipment:

Hickok Electrical Instrument Company -- 512 -- Service and User Manual
File name: Hickok-3862-Manual-Page-1-Picture
Manual Type: Service and User Manual
Pages: 72
Size: 6.27 Mbytes (6574233 Bytes)
Language: english
Revision:
Manual-ID/Number: 2490-648
Date:
Quality: Scanned document, all readable.
Upload date:
MD5: 8786d8d809f41371e30113b4c613fcaf
ed2kID: b8ee635057411bc497049bf534fe259e
Downloads: 115 since 07 January 2013
Information:
SECTION 1 - GENERAL INFORMATION ............................1-1

1-1 Description................................................................1-1

1-2	Specifications and Reference Data..................................1-1

SECTION 2 - PRELIMINARY INSTRUCTIONS ....................2-1

2-1	General ....................................................................2-1

2-2	Controls and Their Uses ..............................................2-1

SECTION 3 - OPERATING INSTRUCTIONS ........................3-1

3-1	General ......, . . .................................................3-1

a.	Voltage vs Voltage Graphing ....................................3-1

b.	Voltage vs Time Graphing........................................3-1

3-2 Operational Check (Channel A)........................................3-2

3-3 Vertical DC Balance Adjust (Channel A)..........................3-2

3-4 Probe Calibration Voltage ............................................3-3

3-5 Use of Probes ............................................................3-3

3-6 Operation of Vertical Controls ......................................3-3

3-7 Operational Check (Channel B) ......................................3-3

3-8 Alternate, Chop ........................................................3-3

3-9 Triggering Controls ....................................................3-4

a.	Slope....................................................................3-4

b.	Level....................................................................3-4

c.	Source..................................................................3-4

d.	Filter .......................,..................3-4

e.	Trace ..................................................................3-4

f.	Locate.....................................3-4

3-10	Horizontal Time/cm Controls ......................................3-4

a.	Horizontal Time/cm................................................3-4

b.	Horizontal Gain......................................................3-4

c.	Horizontal Time/cm, Variable..................................3-4

d.	TV Sync................................................................3-6

e.	VITS positions ......................................................3-6

f.	Internal Triggering of VITS......................................3-6

g.	External Triggering of VITS ....................................3-6

h.	External Horizontal Input ........................................3-6

SECTION 4 - APPLICATIONS ..........................................4-1

4-1	Typical Voltage Measurements......................................4-1

a.	AC Component Measurement ............... . . .	4-1

b.	DC Level Measurement ..........................................4-1

4-2	Typical Time Measurements ........................................4-2

a.	Measurement of Pulse Duration ................................4-2

b.	Measuring the Period of Periodic Waveforms..............4-2

SECTION 5 - THEORY OF OPERATION ............................5-1

5-1	Power Supply ............................................................5-1

5-2 Vertical Preamps ......................................................5-1

5-3 Vertical Switching ......................................................5-1

5-4 Vertical Final ............................................................5-3

5-5 Trigger Pickoff ..........................................................5-3

5-6 Blanking Circuit..........................................................5-3

5-7 Trigger Amplifier ......................................................5-3

5-8 Auto Gate ..................................................................5-5

5-9 Trigger Gate..............................................................5-5

5-10 Sweep Circuit ............................................................5-5

5-11 Television Sync Separator ............................................5-5

5-12 VITS Circuitry............................................................5-6
SECTION 6 - CALIBRATION PROCEDURE ........................6-1

6-1	Calibration Equipment Required ....................................6-1

6-2	Power Supply Calibration..............................................6-1

6-3	Horizontal Preamplifier Calibration ..............................6-2

6-4	Vertical Final Current Adjustment ................................6-2

6-5	Horizontal Final Current Adjustment ..............................6-2

6-6	Sweep Timing Calibration ..........................6-3

6-7	Vertical Amplifier Gain Adjustment................................6-3

6-8	Attenuator Compensation ..............................................6-3

6-9	CRT Capacity Balance and Intensity Limit ......................6-4

Adjustments

SECTION 7 - SERVICING ................................................7-1

7-1	General ....................................................................7-1

7-2	Precaution to be Observed When Servicing the..................7-1

Oscilloscope

7-3	Servicing and Troubleshooting Procedures ......................7-1

7-4	Troubleshooting Chart..................................................7-3

SECTION 8 - PARTS LIST ..............................................8-1
Hickok-3862-Manual-Page-1-Picture
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