7 Trigger Functions
Trigger
Trigger
Accesses a menu of keys to control the selection of the trigger source and the setup of each of the trigger
sources. The analyzer is designed to allow triggering from a number of different sources, for example, Free
Run, Video, External, RF Burst, and so forth.
The TRIG:SOURCe command (below) will specify the trigger source for the currently selected input (RF or
I/Q). If you change inputs, the new input remembers the trigger source it was last programmed to for the
current measurement, and uses that trigger source. You can directly set the trigger source for each input
using the TRIGger:RF:SOURce and TRIGger:IQ:SOURce commands (later in this section). When in External
Mixing, the analyzer uses the RF trigger source.
Note the inclusion of the <measurement> parameter in the command below. Because each measurement
remembers its own Trigger Source, the command must be qualified with the measurement name. Note
that for the Swept SA measurement this is not the case; for backwards compatibility, no <measurement>
parameter is used when setting the Trigger Source for the Swept SA measurement.
See
"Trigger Source Presets" on page 327
See
"RF Trigger Source" on page 330
See
"I/Q Trigger Source" on page 331
See
"More Information" on page 332
Key Path
Front-panel key
Remote Command
:TRIGger:<measurement>[:SEQuence]:SOURce EXTernal1 | EXTernal2 |
IMMediate | LINE | FRAMe | RFBurst | VIDeo | IF | ALARm | LAN | IQMag |
IDEMod | QDEMod | IINPut | QINPut | AIQMag | TV
:TRIGger:<measurement>[:SEQuence]:SOURce?
where <measurement> is the measurement for which you wish to set the Source (blank for the
Swept SA measurement)
Example
TRIG:ACP:SOUR EXT1
Selects the external 1 trigger input for the ACP measurement and the selected input
TRIG:SOUR VID
Selects video triggering for the Swept SA (SANalyzer) measurement in the Spectrum Analyzer mode.
For SAN, do not use the <measurement> keyword. Only send this form in the Spectrum Analyzer
mode or you will get an Undefined Header error
Notes
Not all measurements have all the trigger sources available to them. Check the trigger source
documentation for your specific measurement to see what sources are available.
Not all trigger sources are available for each input. See the
"RF Trigger Source" on page 330
and
"I/Q Trigger Source" on page 331
commands for detailed information on which trigger sources are
available for each input.
Other trigger-related commands are found in the INITiate and ABORt SCPI command subsystems.
*OPC should be used after requesting data. This will hold off any subsequent changes to the selected
trigger source, until after the sweep is completed and the data is returned.
Available ranges and presets can vary from mode to mode.
Dependencies
In some models, there is no second External input. In these models, the External 2 key is blanked and
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W-CDMA & HSPA Measurement Applications Reference
Summary of Contents for E6640A
Page 80: ...Table of Contents lxxx W CDMA HSPA Measurement Applications Reference ...
Page 188: ...3 Programming the Test Set Common Commands 188 W CDMA HSPA Measurement Applications Reference ...
Page 256: ...5 Mode Functions Mode Setup 256 W CDMA HSPA Measurement Applications Reference ...
Page 324: ...6 System Functions System 324 W CDMA HSPA Measurement Applications Reference ...
Page 369: ...8 Channel Power Measurement Auto Couple W CDMA HSPA Measurement Applications Reference 369 ...
Page 389: ...8 Channel Power Measurement Marker W CDMA HSPA Measurement Applications Reference 389 ...
Page 664: ...9 ACP Measurement Auto Couple 664 W CDMA HSPA Measurement Applications Reference ...
Page 669: ...9 ACP Measurement BW W CDMA HSPA Measurement Applications Reference 669 ...
Page 984: ...9 ACP Measurement View Display 984 W CDMA HSPA Measurement Applications Reference ...
Page 1001: ...10 Spectrum Emission Mask Measurement W CDMA HSPA Measurement Applications Reference 1001 ...
Page 1668: ...12 Code Domain Measurement Auto Couple 1668 W CDMA HSPA Measurement Applications Reference ...
Page 2354: ...14 QPSK EVM Measurement 2354 W CDMA HSPA Measurement Applications Reference ...
Page 2364: ...14 QPSK EVM Measurement Auto Couple 2364 W CDMA HSPA Measurement Applications Reference ...