DC
502
TABLE OF CONTENTS
SECTION
1
OPERATING
INSTRUCTIONS
Page
Introduction
1-1
Description
1-1
Installation
1-1
Operational
Check
1-2
Display
Check
1-2
Frequency
Measurements
1-2
Totalizing
1-2
Using
the
Counter
1-3
DIRECT
INPUT Attenuation
and
Trigger
Level
Adjustment
1-3
Signal
Connection
1-3
Measurement
Interval
and
Display
Time
Controls
1-3
Rear
Connector
I/
O
Assignments
1-4
Option
1
—Precision
Time
Base
1-4
Specifications
1-4
SECTION
2
THEORY
OF
OPERATION
)
Input
Circuits
2-1
Time
Base
and
Control
Circuit
2-2
Counter
Circuits
2-3
Decode
and
Display
Multiplex
2-4
Power
Supplies
and
Input/Output
Lines
2-5
SECTION
3
SERVICE
INFORMATION
Symbols
&
Reference
Designators
3-1
Electrical
Parts
List
3-2
Controls
and
Connectors
Illustration
3-9
Adjustments
Illustration
3-9
Parts
Location
Grid
3-10
Block
Diagram
Counter Time Base
and
Control
Schematic
3-11
I
j
!
Counters
and Display
Schematic
Mechanical
Parts
List
Fig.
1
Exploded
View
Accessories
&
Repackaging
3-14
)
;
®
Summary of Contents for DC 502
Page 4: ...DC 502...
Page 24: ...39 39 Relocated on back of board SN B070000 REV MAY 1974...
Page 33: ...FIG 1 EXPLODED...