Tektronix TDS 620A

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Command Descriptions

TDS Family Oscilloscope Programmer Manual

2–191

LOW

MEASUrement :

REFLevel

ABSolute

<NR3> is the low reference level, in volts. The default is 0.0 V.

MEASUREMENT:REFLEVEL:ABSOLUTE:LOW?

might return 0.0E+0 as the low reference level.

MEASUrement:REFLevel:ABSolute:MID

Sets or queries the mid reference level, and is the 50% reference level when

MEASUrement:REFLevel:METHod is set to ABSolute. This command is

equivalent to setting the Reference Levels in the Measure menu.

Measurement

MEASUrement:REFLevel:ABSolute:MID <NR3>

MEASUrement:REFLevel:ABSolute:MID?

MID

MEASUrement

REFLevel

ABSolute

<NR3> is the mid reference level, in volts. The default is 0.0 V.

MEASUREMENT:REFLEVEL:ABSOLUTE:MID .71

sets the mid reference level to .71 volts.

Arguments

Examples

Group

Syntax

Arguments

Examples

Main Page

Table of Contents5
Related Manuals11
Figure 1-1: Common Message Elements13
Overview of the Manual13
Figure 1-2: Functional Groupings and an Alphabetical List of Commands14
Figure 1-3: Service Requests (Srqs) Provide for Event (Interrupt) Driven Programs14
Setting up Remote Communications15
Figure 1-4: the Disks that Accompany this Manual15
Figure 1-5: GPIB Connector Location15
Figure 1-6: How to Stack GPIB Connectors16
Figure 1-7: Typical GPIB Network Configurations17
Figure 1-8: Selecting the I/O System in the Main Menu17
Figure 1-9: Selecting the GPIB Address in the GPIB Configuration Side Menu18
Table 2-1: BNF Symbols and Meanings19
Command Syntax19
Table 2-2: Command Message Elements20
Figure 2-1: Command Message Elements20
Table 2-3: Comparison of Header off and on Responses21
Clearing the TDS Family Oscilloscope21
Constructed Mnemonics24
Argument Types25
Figure 2-2: Block Argument Example27
Figure 2-3: Typical Syntax Diagrams28
Table 2-4: Acquisition Commands29
Command Groups29
- Table 2-5: Alias Commands30
- Table 2-6: Application Menu Commands30
- Table 2-7: Calibration and Diagnostic Commands31
- Table 2-8: Cursor Commands31
- Table 2-9: Display Commands32
- Table 2-10: File System Commands34
- Table 2-11: Hardcopy Commands35
- Table 2-12: Horizontal Commands35
- Table 2-13: Limit Test Commands37
- Table 2-14: Measurement Commands38
- Table 2-15: Miscellaneous Commands39
- RS-232 Commands40
- Table 2-16: RS-232 Commands40
- Table 2-17: Save and Recall Commands41
- Table 2-18: Status and Error Commands41
Trigger Commands42
Table 2-19: Trigger Commands43
Table 2-20: Vertical Commands49
Waveform Commands50
Table 2-21: Waveform Commands53
Table 2-22: Zoom Commands55
Command Descriptions57
- Table 2-23: Waveform Data Points Supported for Reference Locations72
- Table 2-24: Commands that Affect BUSY? Response78
- Table 2-25: Offset Ranges for the TDS 4XXA, 54XA, 6XXA, & 7XXA83
- Table 2-26: Offset Ranges for the TDS 520A & 524A (Aux 1 & Aux 2) Using a 1X Probe83
- Table 2-27: Data and Wfmpre Parameter Settings108
- Table 2-28: XY Format Pairs130
- Table 2-30: Record Length Values (<NR1>)172
- Side Menu184
Message214
Figure 2-4: Message Window Coordinates215
Table 2-31: Commands that Generate an Operation Complete Message219
Appendix D: Factory Initialization Settings224
Figure 2-5: Lessthan and Morethan Arguments257
Table 2-32: Additional Wfmpre Commands313
Registers327
Figure 3-1: the Standard Event Status Register (SESR)328
Figure 3-2: the Status Byte Register (SBR)328
Figure 3-3: the Device Event Status Enable Register (DESER)329
Figure 3-4: the Event Status Enable Register (ESER)330
Figure 3-5: the Service Request Enable Register (SRER)330
Queues331
Event Handling Sequence332
Figure 3-6: Status and Event Handling Process332
Synchronization Methods333
Figure 3-7: Command Processing Without Using Synchronization334
Figure 3-8: Processing Sequence with Synchronization334
Messages338
Table 3–5: Execution Error Messages – EXE Bit 4340
Table 3–6: Device Error Messages – DDE Bit 3343
Table 3–8: Execution Warning Messages – EXE Bit 4344
Table 3–9: Internal Warning Messages345
Figure 4-1: Equipment Needed to Run the Example Programs347
Compiling the Example Programs348
Appendix A: Character Charts353
Table A–2: ASCII & GPIB Code Chart354
Appendix B: Reserved Words355
Appendix C: Interface Specifications359
Interface Messages360
Table D–1: Factory Initialization Settings361

Tektronix TDS 620A - Page 209

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