Agilent 33120A User's Guide

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Chapter 4 Remote Interface ReferenceFrequency Sweep CommandsSWEep:TIME? [MINimum|MAXimum]Query the sweep time. Returns a value in seconds.SWEep:STATe {OFF|ON}Disable or enable the sweep mode. To ensure proper operation, youshould enable the sweep mode after you have set up the other sweepparameters. Only one modulation mode can be enabled at a time. Whenyou enable the sweep mode, the previous modulation mode is turned off.SWEep:STATe?Query the state of the sweep mode. Returns “0” (OFF) or “1” (ON).TRIGger:SOURce {IMMediate|EXTernal|BUS}Select the trigger source. In the triggered sweep mode, the functiongenerator outputs a single sweep each time a trigger is received. Afterone sweep from the start frequency to the stop frequency, the functiongenerators waits for the next trigger while outputting the start frequency.The default is IMM. [ Stored in volatile memory ]œ When the Immediate (internal) source is selected, the functiongenerator outputs a continuous sweep at a rate determined by thesweep rate specified (SWE:TIME). The APPLy command automaticallysets the trigger source to IMMediate.œ When the External source is selected, the function generator willaccept a hardware trigger applied to the rear-panel Ext Trig terminal.The function generator outputs one sweep each time each timeExt Trig receives the rising edge of a TTL pulse. The Trig annunciatorturns on when the function generator is waiting for an external trigger.œ When the Bus (software) source is selected, the function generatoroutputs one sweep each time a bus trigger command is received.To trigger the function generator from the remote interface (GPIB orRS-232), send the *TRG (trigger) command.œ To ensure synchronization when the Bus source is selected, send the*WAI (wait) command. When the *WAI command is executed, thefunction generator waits for all pending operations to complete beforeexecuting any additional commands. For example, the followingcommand string guarantees that the first trigger is accepted andexecuted before the second trigger is recognized."TRIG:SOUR BUS;*TRG;*WAI;*TRG;*WAI"172
Chapter 4 Remote Interface ReferenceFrequency Sweep Commandsœ You can use the *OPC? (operation complete query) command or the*OPC (operation complete) command to signal when the sweep iscomplete. The *OPC? command returns “1” to the output buffer whenthe sweep is complete. The *OPC command sets the “operation complete”bit (bit 0) in the Standard Event register when the burst is complete.TRIGger:SOURce?Query the present trigger source. Returns “IMM”, “EXT”, or “BUS”.4173
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The Rear Panel at a Glance1 Chassis
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ContentsChapter 1 Quick StartTo pre
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11Quick Start
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Error Messagesœ Errors are retriev
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Application ProgramsThis chapter co
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Chapter 6 Application ProgramsUsing
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TutorialThe Agilent 33120A is capab
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Chapter 7 TutorialDirect Digital Sy
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Chapter 7 TutorialAttributes of AC
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Chapter 7 TutorialAttributes of AC
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Chapter 7 TutorialModulationIn ampl
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Chapter 8 SpecificationsAgilent 331
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IndexIndexCC examples, 244cables (R
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IndexIndexinterface (remote)selecti
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IndexIndexstringcalibration, 122dis
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È Copyright Agilent Technologies,
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Agilent 33120A User's Guide

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