Equipment information
Hughes Products 105A Oscilloscope
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Model:
105A
Date:
1961
Category:
Group:
Description:
Memo-Scope
Information
2-1. The Hughes MEMO »SCOPE Oscilloscope, Model 105 A, is an
advanced laboratory-type instrument designed to test any
type of equipment where performance can be translated into
an electrical signal.
The instrument is built around the MEMOTRON storage tube,
which permits use of the Oscilloscope as a storage-type
instrument of long persistence, or as a conventional
high-speed Oscilloscope.
In the storage mode, the MEMO-SCOPE Oscilloscope affords a
visual presentation of all pertinent phenomena related to
the equipment under test, including transient traces which
are difficult or impossible to measure by other means.
Traces remain visible at uniform brightness indefinitely,
without fading or blooming, until intentionally erased.
Successive writings may be superimposed or shifted in
position for convenient comparison. Resolution up to 20
adjacent written lines per inch permits excellent
interpretation of complex patterns. Reference lines can
easily be stored on the face of the MEMOTRON tube as an aid
in making accurate measurements. Traces that exceed the
maximum writing speed of 1,000,000 inches per second in the
storage mode can be visibly displayed by repeated retracing
at repetition rates sufficiently high, to permit cumulative
storage. These unusual features simplify test analyses and
facilitate initial design of equipment by revealing hidden
factors which affect performance.
Wide bandwidth permits detailed examination of complex
waveforms,
A delay network insures presentation of all the incoming
signal without loss of leading edges. Precision circuitry
throughout the instrument affords a high level of accuracy
in making measurements.
Power supplies are connected to critical components in a
manner providing adequate protection in the event of
component failure. The storage circuitry has been designed
to minimize the possibility of damage to the storage surface
of the MEMOTRON tube in event of accidental operator error.
Major circuit boards are mounted on hinged frames, all
components are easily reached for servicing. Filtered
forced-air cooling prevents overheating of the Oscilloscope.
The chassis is all aluminum, with removable vinyl-clad
covers. A series of plug«in preamplifiers are available as
accessories, as well as the Hughes Multitracer, which
permits comparison of a selected number of consecutive
sweeps simultaneously.
Manual Type:
Service and User Manual
Pages:
121
Size:
14.32 Mbytes (15012432 Bytes)
Language:
english
Revision:
Manual-ID:
Date:
1961 01 01
Quality:
Scanned document, all readable.
Upload date:
2017 08 18
MD5:
530ba842b4ec207c18230a5902e90f16
Downloads:
554
Information
Instruction Manual
SECTION I. SPECIFICATIONS 1
SECTION II. GENERAL DESCRIPTION 4
2-1. MEMO-SCOPE Oscilloscope, Model 105A 4
2-2. MEMOTRON Storage Tube 5
2-3, Front Panel Control & Connectors 6
2-4, Accessories 9
SECTION III, OPERATING INSTRUCTIONS 11
3-1. Introduction 11
3-2, Operation 11
SECTION IV. CIRCUIT DESCRIPTION 21
4-1. Block Diagram 21 4-2. Vertical Deflection System 21
4-3. Horizontal Deflection System 23 4-4, Storage
Circuits 30 4-5, Calibrator 31
4-6, Power Supplies 32
SECTION V. MAINTENANCE & SERVICE 37
5-1. Replacement of Components 37 5-2, Soldering 37 5-3,
Disassembly 37 5-4, Trouble Shooting 39
5-5, Voltage Measurements 47
SECTION VI. CALIBRATION & ADJUSTMENT 51
6-1, Recalibration Sequence 51 6-2, Calibration Equipment
52 6-3, Preconditions 52 6-4, Low Voltage Power Supply 52
6-5, Horizontal & Vertical Deflection Plate Levels 53 6-6,
High Voltage Power Supply 5 3 6-7. Sweep Circuit Adjustments 54
6-8, Calibrator Adjustment
6-9. Horizontal Deflection System
6-10. Multiplier Calibration
6-11. Magnifier Calibration
6-12, Vertical Amplifier Calibration
6-13. Storage Circuit Calibration
SECTION VII. PARTS LIST
7-1. Ordering Procedure
7-2. Storage Controls
7-3. Vertical Amplifier
7-4. Horizontal Amplifier
7-5, Trigger Amplifier
7-6. Sweep Generator
7-7« Low Voltage Power Supply
7-8. High Voltage Power Supply
7-9. Calibrator
7-10, Z-Axis Circuit
SECTION VIII. SCHEMATIC DIAGRAMS
Dwg. No. A-106900 Block Diagram
Dwg. No. A-106901 Memotron Storage Controls
Dwg. No. A-106902 Vertical Amplifier
Dwg. No. A-106903 Horizontal Amplifier
Dwg. No, A*106904 Trigger Amplifier
Dwg. No. .A-106905 Sweep Generator
Dwg, No. A-IO69O6 Low Voltage Power supply
Dwg. No. A-106907 High Voltage Power supply
Dwg. No. A-106908 Calibrator
Dwg. No. A-106909 Z-Axis Circuit
Dwg. No. A-106913 • Dual Trace Blanking Circuit