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AWG710 Arbitrary Waveform Generator Programmer Manual
2-103
Retrieving Response Messages
When a query command is sent from the external controller, the waveform
generator places a response message on the output queue. To retrieve this
response message you must perform a retrieval operation through the external
controller. For example, you can call the IBRD subroutine with the National
Instruments drivers for the GPIB interface (see Figure 2–7).
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Query
Waveform Generator
Command Execution
Controller
Retrieve Operation
Response Message
Queuing
Output
Queue
External Controller
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Output
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CALL IBRD
SOURce:FREQuency?
1.000
Figure 2-7: Retrieving response messages
Before a response message is placed in the output queue, the previous response
message, if any, is deleted. Thus, if a second query occurs before the first
response message is retrieved, the first response message will be lost.
The SBR (status byte register) MAV bit can be used to check the response
message queuing state. Refer to the Status and Events section in this manual for
more information about the output queue, SBR, and control methods.
Summary of Contents for AWG710
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Page 14: ...Preface x AWG710 Arbitrary Waveform Generator Programmer Manual...
Page 15: ...Getting Started...
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Page 28: ...Getting Started 1 12 AWG710 Arbitrary Waveform Generator Programmer Manual...
Page 29: ...Syntax and Commands...
Page 30: ......
Page 134: ...Retrieving Response Messages 2 104 AWG710 Arbitrary Waveform Generator Programmer Manual...
Page 145: ...Status and Events...
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Page 173: ...Examples...
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Page 176: ...Programming Examples 4 2 AWG710 Arbitrary Waveform Generator Programmer Manual...
Page 177: ...Appendices...
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Page 195: ...Glossary and Index...
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Page 198: ...Glossary Glossary 2 AWG710 Arbitrary Waveform Generator Programmer Manual...
Page 204: ...Index Index 6 AWG710 Arbitrary Waveform Generator Programmer Manual...
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