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Racal Instruments 2461 Manuals
Manuals and User Guides for Racal Instruments 2461. We have
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Racal Instruments 2461 manual available for free PDF download: User Manual
Racal Instruments 2461 User Manual (196 pages)
200MHz UNIVERSAL COUNTER TIMER Type C
Brand:
Racal Instruments
| Category:
Timer
| Size: 5.26 MB
Table of Contents
Table of Contents
8
Chapter 1
14
General
14
Introduction
14
Figure 1-1, Universal Counter Timer 2461 Type C Function Card
14
Brief Description
15
Outstanding Resolution
15
High Speed Time Measurement
15
Figure 1-2, High Speed Time Measurement
15
High Performance Trigger
16
Voltage Measurements
16
Individual Channel Filtering
16
Figure 1-3, High Performance Trigger
16
Selectable Sensitivity
17
Pulse Characterization
17
Phase Measurement
17
Figure 1-4, Selectable Sensitivity
17
Figure 1-5, Pulse Characterization
17
Powerful Arming Capability
18
High Stability Time Base
18
Special Configurations
18
Measurement Block
18
Figure 1-6, Powerful Arming Capability
18
Measurement Principles
19
Figure 1-7, Measurement Block
20
Chapter 2
22
Installation Instructions
22
Unpacking and Inspection
22
Reshipment Instructions
22
Installation
23
Figure 2-1, the Universal Counter Timer
23
Figure 2-2, Removing the Screws from the Module
24
Figure 2-3, Removing the Front Panel
24
Figure 2-4, the 2461 Type C
25
Figure 2-5, Tightening the Four Screws
25
Label Requirements
26
Figure 2-6, the Racal Instruments Label
26
Chapter 3
28
Theory of Operation
28
Functional Systems
28
Input Channels 1 & 2 System
28
Input Channel 3 System
29
Figure 3-1, Inputs 1 &2
31
Measurement System
32
Figure 3-2, Measurement Block
34
Microprocessor System
35
Details of the Counter
36
Figure 3-3, Block Diagram of Processor System
36
Measurement Functions
37
Signal Inputs
41
Chapter 4
44
Programming the Type C Function Card
44
Introduction
44
Default Conditions
44
Functional Check
47
Introduction
47
VXIBUS Communication Check
47
List of SCPI Commands
48
2461 TYPE C Commands
53
CALCULATE Subsystem
53
Measurement Subsystem
55
Configure Subsystem
55
Fetch Subsystem
67
Measure Subsystem
70
READ Subsystem
81
Input Subsystem
82
Output Subsystem
93
Sense Subsystem
94
Source Subsystem
104
Test Subsystem
105
Trigger Subsystem
111
2461 TYPE C-Specific Error Messages
118
Examples of SCPI Commands Used to Manipulate the Instrument
118
Selecting the Counter Function Card
119
Preparation for Measurement
119
Basics
121
Multiple Measurements
121
Automatic Resolution
122
Chapter 5
124
USING the VXI Plug&Play INSTALL DISKS
124
Operating the VXI Plug&Play Install Disk
124
Using the Soft Front Panel
124
Figure 5-1, 2461-C Front Panel
125
Arm Source Configuration
128
Figure 5-2, Configure Arming Secondary Panel
128
Configure Inputs
129
Figure 5-3, Configure Input Secondary Panel
129
Select Reference
131
Figure 5-4, Select Reference
131
Configure Math Function
132
Figure 5-5, Configure Math Function Secondary Panel
132
About
133
Figure 5-6, about Secondary Panel
133
Chapter 6
134
Performance Verification and Adjustments
134
Introduction
134
Test Equipment Required
134
Input 1 Sensitivity Test
135
Figure 6-1, Input 1 Low Frequency Sensitivity Test Configuration
135
Table 6-1, Input 1 Sensitivity Low Frequency Test
135
Table 6-2, Input 1 Sensitivity High Frequency Performance Limits
136
Input 2 Sensitivity Test
137
Figure 6-2, Input 2 Low Frequency Sensitivity Test Configuration
137
Table 6-3, Input 2 Sensitivity Low Frequency Tests
138
Table 6-4, Input 2 Sensitivity High Frequency Tests
138
Time Interval 1:2 Test
141
Figure 6-3, Time Interval 1-2 Test Configuration
141
Table 6-5, Time Interval 1-2 Test Performance Limits
142
Totalize 1 by 2 Test
143
Figure 6-4, Totalize 1 by 2 Test Configuration
143
Ratio 1:2 Test
144
Figure 6-5, Ratio 1 : 2 Test Configuration
144
Trigger Level Accuracy Test
145
Figure 6-6 Input 1 Trigger Level Test Configuration
145
Functional Checks
147
Input 1 Filter Check
147
Figure 6-7, Input 1 Filter Check Configuration
147
Input 2 Filter Check
148
Figure 6-8, Input 2 Filter Check Configuration
148
Input 1 Attenuator Check
150
Figure 6-9, Input 1 X10 Attenuator Check Configuration
150
Input 2 Attenuator Check
151
Figure 6-10, Input 2 X10 Attenuator Check Configuration
151
Hysteresis Check for Input 1
152
Hysteresis Check for Input 2
152
Calibration, External Standard Output (2461-Ce and 2461-Cf)
153
Figure 6-11, External Standard Output
153
Chapter 7
156
Product Support
156
Reshipment Instructions
156
Appendix A: SPECIFICATIONS
160
Appendix B: APPLICATION NOTES
190
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