Fairchild Instrumentation 79-02A Oscilloscoop
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Model:
79-02A
Datum:
1965
Categorie:
Groep:
Omschrijving:
Dual Trace Plug-In
Informatie
INTRODUCTION
The Type 79-02A Amplifier is a dual-channel Amplifier and is
provided with two basic Amplifier sensitivities and
bandwidths for XI and X10 calibrated operation as follows:
100 millivolts/division sensitivity with a dc to 100
megacycle bandwidth.
10 millivolts/division sensitivity with a dc to 90 megacycle
bandwidth.
- Operation of this Plug-In unit enables the user to obtain
two vertical signals on the screen simultaneously or to
display either channel individually.
The VARIABLE gain control, located concentrically with the
VOLTS/DIV switch, has a range of greater than 2-1/2 to 1.
This VARIABLE gain control provides continuous overlap
between steps of the attenuator (VOLTS/DIV) switch. A
detented stop position is provided when the VARIABLE gain
control is set to CAL.
A MODE switch is provided which enables the selection of
either Channel 1 or Channel 2 for separate display or the
combination of both channels for dual display. In addition,
ALTernate or CHOPped modes of operation are available. Use
of the Polarity Inversion switch may give Channel 1 minus
Channel 2 or Channel 2 minus Channel 1 presentation when
MODE switch is set to ADDED.
The Type 79-02A Amplifier is intended for use in the Y
cavity of the Type 766H.F Series Oscilloscopes.
2. FEATURES
•100 Me bandwidth at 100 mv/div sensitivity •10 mv/div
sensitivity with 90 Me bandwidth •Solid state circuitry
•Cascading feature converts instrument from dual trace to a
high-gain, single trace unit; 1 mv/div sensitivity with 30
Me bandwidth nominal.
FEATURES (concluded)
• Front-panel GAIN ADJ control is provided for each channel
to normalize gain between channels
• Polarity Inversion switch enables subtraction of two
signals when operating in the Added mode
• Ground position on Input Selector switch provides ground
reference on base line without necessity of grounding input
of instrument
• Provides equivalent dual-beam scope operation when : used
with Fairchild Type 74-17A Automatic Display
Time Base Plug-In unit ;
Handleidingen type:
Service-en gebruikershandleiding
Pagina’s:
113
Grootte:
4.12 Mbytes (4325257 Bytes)
Taal:
english
Herziening:
Handleidingen-ID:
6704 5512
Datum:
1965 01 01
Kwaliteit:
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2017 05 07
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Informatie
1. TECHNICAL SUMMARY
1-1 Introduction
1-2 Features
1—3 Technical Summary (Specifications)
Type 79-02A Nominal Frequency Response Curve
*2. OPERATING INSTRUCTIONS
2-1 First Time Operation 2-2 Applying a Signal
2-3 DC Balance Adjustment .
2-4 Setting Gain of Dual-Trace Amplifier
2-5 Input-Selector Switch
2-6 Obtaining a Display
2-7 Cabling Techniques in the Nanosecond Realm
2-8 use of Probes
2-9 Dual-Trace Operation
2-10 Dual Trace Triggering
2-11 Setting up Amplifier for Greater Input Sensitivity
2-12 Voltage Measurements
2-14 Measuring Short Rise Times
3. FUNCTIONAL BLOCK DIAGRAMS
4• PERFORMANCE ASSURANCE TEST
4-1 Maintenance Check to Assure Performance
4”2 Checking DC Balance Adjustment
4-3 Checking Sensitivity of Channels 1 & 2
4-4 Checking Fast Rise Time of Channels 1 & 2
4-5 Checking Mode Switch
4-6 Checking Chopped Operation
5* MAINTENANCE AND RECALIBRATION
5“1 Introduction
5-2 Removal and Replacement of Parts 5-3 Servicing Hints
5-4 Gaining Access to Chassis
5-5 Test Equipment Required for Service Adjustments
5-6 Gas Compensation Adjustments
Section Title
5. (concluded)
5-7 DC and Bridge Bal Adjustment 5-6
5-8 Invert Balance Adjustment 5-7
5-9 X10 Level Adjustment 5-8
5-10 Output Current Adjustment 5-9
5-11 Gain Adjustments 5_9
5-12 X10 Cal Adjustment 5-10
5-13 Trigger DC Level Adjustment 5-10
: 5-14 Channel 2 Output Level Adjustment . 5-11
5-15 High Frequency:Adjustments 5-11
5-16 Input Capacitance Standardization and
Attenuator Adjustment 5-17
6. ELECTRICAL PARTS LIST AND SCHEMATICS
LIST OF RECOMMENDED VENDORS TABLE
Number Title Page
Attenuator Compensation Trimmers 5-21
ILLUSTRATIONS
Figure Title page
1-1 Type 79-02A Dual Trace 100 Me Amplifier 1-0
2-1 Function of Type 79-02A Dual Channel Controls 2-3
2~2 Function of Type 79-02A Input Channel
1 Switching Facilities 2-5
2-3 Type 79-02A Calibrator Display 2-6
2-4 to 2-8 Waveform Displays 2-9 t
2-13
2-9 to 2-11 Waveform Displays 2-13
2-12 Peak-to-Peak Voltage Measurements 2-249
2”^3 Instantaneous Voltage Measurement with
Respect to a Reference Potential 2-26