Boonton 4530 Peak Power Meter User Manual - Manual (Page 55)

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Boonton Electronics Chapter 3
4530 Series RF Power Meter Operation
Main Menu > Trig/Time > HoldOff
Sets the trigger holdoff time. Trigger holdoff is used to disable the trigger for a specified amount of time after
each trigger event. The holdoff time starts immediately after each valid trigger edge, and will not permit any
new triggers until the time has expired. When the holdoff time is up, the trigger re-arms, and the next valid
trigger event (edge) will cause a new sweep. This feature is used to help synchronize the power meter with
burst waveforms such as a TDMA or GSM frame. The trigger holdoff resolution is one microsecond, and it
should be set to a time that is just slightly shorter than the frame repetition interval.
Range: 10 e-6 to 0.999999 seconds, 0.0 = no holdoff
Default: 0.0 seconds
Remote Command: TRIGger:HOLDoff <n>
Main Menu > Trig/Time > Trig Srce
Select the source of the trigger signal. In the Modulated, CW and Statistical modes, a measurement can be
triggered. In the Pulse mode, the trace can be triggered to synchronize the waveform and the combination of
the waveform and measurement can be triggered as well. Any trigger source that includes “BUS” uses a GPIB
measurement trigger qualifier. In these cases, the GPIB trigger arms a signal trigger circuit. This permits bus
synchronization of a process that includes a signal-triggered measurement. These modes DO NOT APPLY to
manual operation. Use ESC/Stop and Enter/Run from the keypad.
Immediate No trigger. Measurement starts on INITiate.
Bus Group Execute Trigger or *TRG from GPIB. No hardware trigger.
Sensor1 Internal signal from sensor1 (Pulse Mode only) (Default)
Sensor2 Internal signal from sensor2 (Pulse Mode only)
External External signal input (Pulse Mode only)
Bus/Snsr1 GET or *TRG arms the Sensor1 trigger. (Pulse Mode only)
Bus/Snsr2 GET or *TRG arms the Sensor2 trigger. (Pulse Mode only)
Bus/Ext GET or *TRG arms the External trigger. (Pulse Mode only)
Remote Command: TRIGger:SOURce < IMMEDIATE, BUS , SENSOR1, SENSOR2,
EXTERNAL , BUS>SNSR1, BUS>SNSR2, BUS>EXT >
Main Menu > Trig/Time > Trig Mode
Selects the trigger mode for synchronizing data acquisition with pulsed signals.
Norm Normal mode will cause a sweep to be triggered each time the power level crosses
the preset trigger level in the direction specified by
TRIGger:SLOPe . If there are
no edges that cross this level, no data acquisition will occur.
Auto Auto mode operates in much the same way as Normal mode, but will automatically
generate a trace if no trigger edges are detected for a period of time (100 to 500
milliseconds, depending on timespan). This will keep the trace updating even if
the pulse edges stop.
PkToPk Peak-To-Peak mode operates the same as AUTO mode, but will adjust the trigger
level to halfway between the highest and lowest power levels detected. This aids
in maintaining synchronization with a pulse signal of varying level. Note that a
setting of PKTOPK will be overridden and forced back to AUTO if a trigger level is
set. (Default)
Remote Command: TRIGger:MODe <NORM, AUTO, PKTOPK>