13 sense:sbuf data array commands – Boonton 4530 Peak Power Meter User Manual User Manual
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Boonton Electronics
Chapter 4
4530 Series RF Power Meter
Remote Operation
4.5.13 SENSe:SBUF Data Array Commands
The SBUF commands (which are grouped under the SENSe subsystem) are used to control data capture and output of
a long array of sequential measurement samples (the “Sample BUFfer”). This capability is useful for capturing very
long, single, triggered events in the time domain. These commands are used in PULSE mode, and allow control of data
sampling and array output. Up to 12,000 points may be captured at programmable rates up to 2.5 million power readings
per second for importing long baseline measurements into a database on the host.
SENSe:SBUF:MODE
Description:
Set or return the on/off state of “user” sampling mode. When user mode is active (ON), the
timespan and trigger delay settings are overridden, and user programmed parameters are
used to configure sample rate, buffer size, and trigger position. Note that user mode is only
for outputting long measurement arrays, and that marker and automatic measurements are
not active in this mode. Setting to OFF restores normal operation.
Syntax:
SENSe:SBUF:MODE <asc>
Argument:
<asc> = OFF, ON
Valid Modes:
Pulse mode only
SENSe:SBUF:PERiod
Description:
Set or return the sampling period in internal, 80ns counts for “user” sampling mode. Sample
rate = (12.5 / n) MHz.
Syntax:
SENSe:SBUF:PERiod <n>
Argument:
<n> = 5 to 12500 (equivalent to 2.5 MSa/sec to 1.0 KSa/sec)
Valid Modes:
Pulse mode only,
SENSe:SBUF:MODE
must be ON.
SENSe:SBUF:PREsamp
Description:
Set or return the number of pretrigger samples: points which are gathered for each sweep
before arming the trigger in “user” sampling mode. When the array is read, these points will
appear with a negative INDEX.
Syntax:
SENSe:SBUF:PREsamp <n>
Argument:
<n> = 0 to 12000 (see restrictions)
Valid Modes:
Pulse mode only,
SENSe:SBUF:MODE
must be ON.
Restrictions:
PREsamp + POSTsamp must be less than 12,000
SENSe:SBUF:POSTsamp
Description:
Set or return the number of posttrigger samples: points which are gathered for each sweep
after the trigger has been armed and a valid edge has been received. When the array is read,
these points will appear with a negative INDEX.
Syntax:
SENSe:SBUF:POSTsamp <n>
Argument:
<n> = 0 to 12000 (see restrictions)
Valid Modes:
Pulse mode only,
SENSe:SBUF:MODE
must be ON.
Restrictions:
PREsamp + POSTsamp must be less than 12,000