Keysight E6640A, Measurement Applications User & Programmer Reference

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10 Spectrum Emission Mask Measurement
Sweep/Control
Any changes to the settings in the setup menus under each Gate Source selection key (for example:
Trigger Level, Trigger Delay, etc.) also affect the corresponding settings under the Trigger menu keys. The
SCPI commands used for these are the same for Trigger and Gate, since there is only one setting which
affects both Gate and Trigger. Example: to set the Trigger Level for External 1 you use the command
:TRIG:EXT1:LEV regardless of whether you are using External 1 as a Trigger Source or a Gate Source.
Key Path
Sweep/Control, Gate
Remote Command [:SENSe]:SWEep:EGATe:SOURce EXTernal1 | EXTernal2 | LINE | FRAMe |
RFBurst
[:SENSe]:SWEep:EGATe:SOURce?
Dependencies In some models, there is no second External input. In these models, the External 2 key is blanked and
the EXTernal2 parameter will generate a “Hardware missing; Not available for this model number”
error.
Preset EXTernal 1
GSM/EDGE, MSR: FRAMe
LTETDD: EXTernal 1When Direction is Downlink, FRAMe when Direction is Uplink.
Initial S/W Revision Prior to A.02.00
Modified at S/W Revision A.03.00, A.14.00
Video (IF Envelope)
Pressing this key, when it is not selected, selects the video signal as the trigger. The Video trigger condition
is met when the video signal (the filtered and detected version of the input signal, including both RBW and
VBW filtering) crosses the video trigger level.
When the detector selected for all active traces is the average detector, the video signal for triggering
does not include any VBW filtering.
The video trigger level is shown as a labeled line on the display. The line is displayed as long as video is the
selected trigger source.
Pressing this key, when it is already selected, accesses the video trigger setup functions.
Key Path
Trigger
Example TRIG:SOUR VID Swept SA measurement
TRIG:<meas>:SOUR VID Measurements other than Swept SA
Notes Log Plot and Spot Frequency measurements do not support Video Trigger
Dependencies Video trigger is allowed in average detector mode.
State Saved Saved in instrument state
Status Bits/OPC
dependencies
The Status Operation Register bit 5 "Waiting for Trigger" is set at the same time as the Sweeping or
Measuring bit is set. It is cleared when the trigger actually occurs (that is, after the trigger event
occurs and all the applicable trigger criteria have been met). A corresponding pop-up message
("Waiting for trigger") is generated if no trigger signal appears after approximately 2 sec. This
message goes away when a trigger signal appears.
W-CDMA & HSPA Measurement Applications Reference 1271