Tektronix KEITHLEY 2520 Manuals

Manuals and User Guides for Tektronix KEITHLEY 2520. We have 1 Tektronix KEITHLEY 2520 manual available for free PDF download: User Manual

Tektronix KEITHLEY 2520 User Manual (319 pages)

Pulsed Laser Diode Test System

Brand: Tektronix | Category: Test Equipment | Size: 3.04 MB

Table of Contents
5
Getting Started
19
General Information
20
Contact Information
20
Specifications
20
Safety Symbols and Terms
20
Inspection
21
Options and Accessories
21
Signal Cables and Adapters
21
Interface Cables
22
Rack Mount Kits
22
Product Overview
23
Mainframe Front and Rear Panel Familiarization
24
Front Panel Summary
24
Rear Panel Summary
25
Testhead Front and Rear Panel Familiarization
27
Front Panel Summary
27
Rear Panel Summary
28
Power-Up
29
Line Voltage
29
Line Power Connection
29
Power-Up Sequence
29
System Identification
30
Fuse Replacement
30
Display
31
Display Format
31
Display Example
31
Display Units
31
Status and Error Messages
31
Remote Display Programming
32
Front Panel Display Tests
32
Default Settings
32
Saving and Restoring User Setups
32
Saving Setups
32
Restoring Setups
33
Power-On Configuration
33
Factory Default Settings
33
Remote Setups
35
Menus
35
Main Menu
36
Rules to Navigate Menus
36
Main Operation Menus
37
Configuration Menus
39
Connections
43
Connection Precautions
44
Testhead Preparation
45
Testhead Mounting
45
Testhead Connections
45
Signal Connectors
47
Triax DETECTOR Connectors
48
CURRENT OUTPUT and VOLTAGE SENSE Connectors
48
Interlock Connections
48
Remote Interlock Connections
48
Key Interlock
49
Laser Diode Test Connections
49
Connecting Cables
49
Typical Connections
49
Equivalent Circuit
50
Polarity Considerations
50
Connection Considerations
52
Basic Operation
53
Operation Overview
54
Laser Diode Source and Measure Capabilities
54
Laser Diode Source and Measure Ranges
54
Laser Diode Source Compliance
55
Photodiode Source and Measure Capabilities
55
Photodiode Source and Measure Ranges
56
Basic Circuit Configuration
57
Polarity
58
Laser Diode Current Source Polarity
58
Laser Diode Voltage Measurement Polarity
59
Detector Measurement Polarity
60
Voltage Bias Polarity
60
Configuring Sources
61
Editing Source Values
61
Configuring Laser Diode Source
62
DC Mode
62
Pulse Mode
63
Setting Photodiode Detector Source Values
63
Configuring Measurements
64
Configuring Laser Diode Measurements
64
Configuring Photodiode Measurements
64
Remote Source and Measure Configuration
65
Source and Measure Configuration Commands
65
Programming Example
65
Laser Diode Testing
67
Source and Measure Configuration Menus
68
Front Panel Laser Diode Testing
69
Front Panel Test Procedure
70
Step 1: Configure Laser Diode Measurement Function
70
Step 2: Configure Photodiode Detector Measurement Functions
70
Step 3: Configure Laser Diode Current Source
70
Step 4: Configure Photodiode Detector Voltage Bias Sources
70
Step 5: Configure Math Functions
71
Step 6: Turn Source Outputs on and Trigger Readings
71
Step 7: Observe Readings on the Display
71
Step 8: Turn Source Outputs off
71
Remote Laser Diode Testing
71
Laser Diode Test Commands
71
Programming Example
73
Source-Measure Concepts
75
Pulse Concepts
76
Overview
76
Delay-Pulse Cycle
76
Delay Phase
77
Pulse Phase
77
Duty Cycle
77
Front Panel Pulse Parameters
78
Fixed Mode
78
Staircase Sweep Mode
78
Remote Pulse Parameters
80
Fixed Mode
80
Staircase Sweep Mode
80
Pulse Rise and Fall Times
81
Sweep Waveforms
82
Staircase Sweeps
82
Custom Sweep
82
Current Source Operating Boundaries
84
Limit Lines
84
Loading Effects
84
Data Flow
86
Basic Reading Display
86
Math Function Display
86
Sweep Data Storage
86
Range, Filter, and Math
88
Range
89
Measurement Ranges
89
Laser Diode Voltage Ranges
89
Photodiode Detector Current Ranges
89
Maximum Readings
90
Setting the Measurement Range
90
Source Ranging
90
Remote Range Programming
90
Range Programming Example
91
Filter
91
Averaging Filter Overview
91
Filter Configuration
92
Filter Control
92
Remote Filter Programming
92
Filter Command
92
Filter Programming Example
93
Measurement Math Functions
93
Conductance
94
Resistance
94
Power
94
MX + B
94
Delta (Remote Only)
94
Front Panel Math Functions
95
Math Configuration Menu
95
Programming Math Functions
95
Remote Math Functions
96
Math Function Commands
96
Math Function Programming Example
97
Sweep Operation
98
Sweep Types
99
Linear Staircase Sweep
99
Logarithmic Staircase Sweep
100
Configuring and Running a Sweep
102
Front Panel Sweep Operation
102
Configuring a Sweep
102
Performing Sweeps
103
Performing a Linear Staircase Sweep
103
Performing a Log Staircase Sweep
104
Remote Sweep Operation
105
Staircase Sweep Commands
105
Staircase Sweep Programming Example
106
Custom Sweep Commands
107
Custom Sweep Programming Example
107
Triggering
109
Trigger Model (Front Panel Operation)
110
Idle Layer
111
Input Triggers
111
Delay and Pulse Phases
111
Delay Phase
111
Pulse Phase
112
Filtering
112
Sweep Points
112
Counter
112
Output Trigger
112
Bench Defaults
113
Trigger Link
113
Input Trigger Requirements
114
Output Trigger Specifications
114
Configuring Triggering
115
CONFIGURE TRIGGER Menu
115
Remote Triggering
117
Trigger Model (Remote Operation)
117
Idle and Initiate
117
Event Detection
119
Input Triggers
119
Delay and Pulse Phases
120
Delay Phase
120
Pulse Phase
120
Filtering
120
Sweep Points
120
Counter
120
Output Trigger
121
GPIB Defaults
121
Operation Summary
121
Remote Trigger Commands
121
Remote Trigger Example
122
Digital I/O Port, Interlocks, and Pulse Sync Output
124
Digital I/O Port
124
Port Configuration
124
Digital Output Lines
124
Start-Of-Test (SOT) Line
125
+5V Output
125
Digital Output Configuration
125
Sink Operation
125
Source Operation
126
Controlling Digital Output Lines
126
Front Panel Digital Output Control
126
Remote Digital Output Control
127
Interlocks
127
Interlock Operation
128
Interlock Status Indicator Test Sequence
129
Reading Interlock State
129
Pulse Sync Output
130
Pulse Sync Waveform
130
Pulse Sync Connections
131
Remote Operations
132
Differences: Remote Vs. Local Operation
133
Local-To-Remote Transition
133
Remote-To-Local Transition
133
Selecting an Interface
133
GPIB Operation
134
GPIB Standards
134
GPIB Connections
135
Primary Address
137
General Bus Commands
137
REN (Remote Enable)
138
IFC (Interface Clear)
138
LLO (Local Lockout)
138
GTL (Go to Local)
138
DCL (Device Clear)
138
SDC (Selective Device Clear)
139
GET (Group Execute Trigger)
139
SPE, SPD (Serial Polling)
139
Front Panel GPIB Operation
139
Error and Status Messages
139
GPIB Status Indicators
140
Rem
140
Talk
140
Lstn
140
Srq
140
LOCAL Key
140
Programming Syntax
141
Command Words
141
Commands and Command Parameters
141
Query Commands
143
Case Sensitivity
143
Long-Form and Short-Form Versions
143
Short-Form Rules
144
Program Messages
144
Single Command Messages
144
Multiple Command Messages
145
Command Path Rules
145
Using Common and SCPI Commands in the same Message
146
Program Message Terminator (PMT)
146
Command Execution Rules
146
Response Messages
146
Sending a Response Message
146
Multiple Response Messages
146
Response Message Terminator (RMT)
147
Message Exchange Protocol
147
RS-232 Interface Operation
147
Sending and Receiving Data
147
Baud Rate
147
Data Bits and Parity
148
Terminator
148
Flow Control (Signal Handshaking)
148
RS-232 Connections
149
Error Messages
151
Programming Example
151
Status Structure
152
Overview
153
Status Byte and SRQ
153
Status Register Sets
153
Queues
153
Clearing Registers and Queues
155
Programming and Reading Registers
156
Programming Enable Registers
156
Reading Registers
157
Status Byte and Service Request (SRQ)
158
Status Byte Register
159
Service Request Enable Register
159
Serial Polling and SRQ
160
SPE, SPD (Serial Polling)
160
Status Byte and Service Request Commands
161
Programming Example - Set MSS (B6) When Error Occurs
161
Status Register Sets
162
Register Bit Descriptions
162
Standard Event Register
162
Operation Event Register
164
Measurement Event Register
165
Questionable Event Register
167
Condition Registers
168
Event Registers
168
Event Enable Registers
169
Programming Example - Program and Read Register Set
170
Queues
170
Output Queue
170
Error Queue
171
Programming Example - Read Error Queue
172
Common Commands
173
Command Summary
174
Command Reference
175
IDN? - Identification Query
175
OPC - Operation Complete
175
OPC? - Operation Complete Query
175
OPC Programming Example
176
OPT? - Option Query
176
SAV <Nrf> - Save
176
RCL <Nrf> - Recall
176
SAV, *RCL Programming Example
177
RST - Reset
177
TRG - Trigger
177
TRG Programming Example
177
TST? - Self-Test Query
178
WAI - Wait-To-Continue
178
SCPI Signal-Oriented Measurement Commands
179
Command Summary
180
Acquiring Readings
180
Fetch
180
[:Sense[1]]:Data[:Latest]
181
[:Sense2]:Data[:Latest]
181
[:Sense3]:Data[:Latest]
181
Read
181
Measure
181
SCPI Command Reference
182
Reference Tables
183
Calculate Subsystems
195
Select Laser Diode Math Function
196
Format <Name
196
Set MX + B Parameters
196
Mbfactor <N
196
Mmfactor <N
196
Units <Name
197
Enable and Read Math Function Result
197
State <B
197
Data
198
Latest
198
Display Subsystem
198
Control Display
198
Enable <B
198
Attributes
199
Read Display
199
Data
199
Define :TEXT Messages
199
DATA <A
199
State <B
200
Format Subsystem
200
Data Format
200
[:DATA] <Type>[,Length]
200
Data Elements
203
Elements <Item List
203
Calculate Data Elements
204
Calculate <Item List
204
Trace Data Elements
205
Trace <Item List
205
Source4 <Name
206
Byte Order
206
Border <Name
206
Status Register Format
207
Sregister <Name
207
Output Subsystem
208
Turn Sources on or off
208
[:State] <B
208
Interlock Status
208
Tripped
208
Sense Subsystem
208
Select Laser Diode Voltage Measurement Range
209
[:Upper] <N
209
Select Detector Current Measurement Range
209
Select Polarity
210
Polarity <Name
210
Query Voltage Limit
210
Tripped
210
Query Latest Readings
211
[:Latest]
211
Configure and Control Filter
211
Count <N
211
[:State] <B
212
Abort Sweep
212
Cabort[:Level] <N
212
Cabort:state <B
212
Source Subsystem
213
Source[1]
213
Control Source Outputs On-Off
213
[:Immediate]
213
Select Sourcing Mode
213
MODE <Name
213
Select Source Function
214
Function[:Shape] <Name
214
Select Source Range
214
Range <N
214
Set Amplitudes
215
[:Immediate][:Amplitude] <N
215
LOW <N
215
Set Voltage Limit
216
Protection[:Level] <Nrf
216
Select Source Polarity
216
Polarity <Name
216
Set Pulse Times
217
Delay <N
217
Width <N
217
Transition[:State] <B
217
Configure Sweeps
218
Spacing <Name
218
Start <N
218
STOP <N
218
Center <N
219
SPAN <N
219
STEP <N
220
Points <N
221
Direction <Name
221
Configure List
222
Current <Nrf List
222
Append <Nrf List
222
Points
223
Width <Nrf List
223
Append <Nrf List
223
Delay <Nrf List
224
Append <Nrf List
224
Points
224
Sweep and List Program Examples
225
Linear Staircase Sweep
225
List Sweep
225
Logarithmic Staircase Sweep
226
Source2 and Source3
227
Set Amplitudes
228
[:Immediate][:Amplitude] <N
228
Source4
228
Setting Digital Output
228
[:Level] <Nrf> | <NDN
228
Setting Bit Size
229
Bsize <N
229
Status Subsystem
230
Read Event Registers
230
[:Event]
230
Program Event Enable Registers
230
Enable <NDN> or <Nrf
230
Read Condition Registers
231
Condition
231
Select Default Conditions
231
Preset
231
Error Queue
231
[:Next]
231
Clear
231
Enable <List
232
Disable <List
232
System Subsystem
232
Default Conditions
232
Preset
232
Posetup
233
Error Queue
233
[:Next]
233
All
233
Count
234
Code[:Next]
234
Code:all
234
Clear
234
Simulate Key Presses
234
Key
234
Read Version of SCPI Standard
235
Version
235
RS-232 Interface
236
Local
236
Remote
236
Rwlock
236
Reset Timestamp
236
Reset
236
Trace Subsystem
237
Read Sample Buffer
237
Data
237
Value? [<Nrf>]
237
Configure Sample Buffer
238
Points <N
238
Trigger Subsystem
238
Initiate Source/Measure Cycle
238
Initiate
238
Abort Source/Measure Cycle
239
Abort
239
Program Trigger Model
239
Count <N
239
Source <Name
239
Timer <N
240
Iline <Nrf
241
Oline <Nrf
241
Output <Name
241
Specifications
242
Status and Error Messages
244
Introduction
245
Status and Error Messages
245
Eliminating Common SCPI Errors
250
113, "Undefined Header
250
410, "Query INTERRUPTED
250
420, "Query UNTERMINATED
251
Data Flow
252
Introduction
253
Buffers
253
SENS1, SENS2, and SENS3
254
Init
254
Fetch
254
READ? and Measure
255
Calculate1:Data?, Calculate2:Data?, Calculate3:Data
255
Calculate4:Data
255
Trace:data? and Trace:data:value
255
IEEE-488 Bus Overview
256
Introduction
257
Bus Description
257
Bus Lines
260
Data Lines
260
Bus Management Lines
260
Handshake Lines
260
Bus Commands
262
Uniline Commands
263
Universal Multiline Commands
263
Addressed Multiline Commands
264
Address Commands
264
Unaddress Commands
264
Common Commands
265
SCPI Commands
265
Command Codes
266
Typical Command Sequences
267
IEEE Command Groups
268
Interface Function Codes
269
IEEE-488 and SCPI Conformance Information
272
Introduction
272
Measurement Considerations
275
Optimizing Laser Diode Connections
276
Current Pulse Output Circuit Model
276
Cable Inductance
277
Increasing Cable Length
279
Exposed Loop Area
280
Sense Lead Connections
282
Magnetic Coupling
284
Increasing Laser Diode Pulse Measurement Speed
285
Overview
285
Laser Diode Impedance Matching
286
Model 2520 Output Circuit Model
287
Transmission Line Model
288
Forward Voltage Measurement
289
Photodiode Current Measurement Channels
290
Noise and Source Impedance
291
DUT Resistance
291
Source Capacitance
292
Generated Currents
292
Offset Currents
293
Dielectric Absorption
293
Voltage Burden
294
General Measurement Considerations
294
Ground Loops
294
Light
295
Electrostatic Interference
296
Magnetic Fields
296
Electromagnetic Interference (EMI
297
GPIB 488.1 Protocol
298
Introduction
299
Selecting the 488.1 Protocol
299
Protocol Differences
300
Message Exchange Protocol (MEP
300
Using SCPI-Based Programs
300
Bus Hold-Off
301
Trigger-On-Talk
301
Message Available
301
General Operation Notes
301
Example Programs
302
Introduction
303
Hardware Requirements
303
Software Requirements
303
General Program Instructions
303
Laser Diode Test Program
304
Linear Staircase Sweep Program
305
List Sweep Program
306
Continuous Pulse Mode
307
Pulse Test Advantage
308
Duty Cycle
308
Configuring the 2520 to Use Continuous Pulse Mode
309
Front Panel
309
Remote Configuration over GPIB/IEEE-488
310
Related Modes
310

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