17 trigger subsystem, Trigger:cdf:count, Trigger:cdf:decimate – Boonton 4540 Peak Power Meter User Manual User Manual
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Boonton 4540 Series RF Power Meter
Remote Operation
5-78
5.6.17 TRIGger Subsystem
The TRIGger group of commands is used to control synchronization of data acquisition with external events. TRIGger
commands generally affect only Pulse Mode.
TRIGger:CDF:COUNt
Description:
Set or return the terminal count (sample population size) in millions of samples for Statistical
Mode acquisition. When the terminal count is reached, the CCDF is considered ―complete‖, and
the instrument will halt acquisition if INITiate:CONTinuous is set to OFF. If
INITiate:CONTinuous is ON, sample acquisition will continue in the manner specified by the
TRIGger:CDF:DECImate setting.
Syntax:
TRIGger:CDF:COUNt <numeric_value>
Argument:
<numeric_value> = 1 to 4000 megasamples
Valid Modes:
Statistical Mode only.
TRIGger:CDF:DECImate
Description:
Set or return the decimation status when running continuously in Statistical Mode. This action
occurs when the terminal count is reached (as defined by TRIGger:CDF:COUNt) or the terminal
running time is reached (as defined by TRIGger:CDF:TIMe). When set to OFF, the CCDF will
clear all data and restart. If set to ON, the entire sample population will be decimated (divided by
two), and new samples will continue to accumulate into the same histogram. Decimating has the
effect of maintaining the ―shape‖ of the statistical result while slowly decaying away the effect of
past history and updating to include new events. This setting works best with relatively small
terminal counts (1 to 10 million counts) and short running times (a few seconds).
Syntax:
TRIGger:CDF:DECImate <Boolean>
Argument:
<Boolean> = { 0, 1, OFF, ON }
Valid Modes:
Statistical Mode only.
TRIGger:CDF:TIMe
Description:
Set or return the terminal running time in seconds for Statistical Mode acquisition. When the
terminal time is reached, the CCDF is considered ―complete‖, and the instrument will halt
acquisition if INITiate:CONTinuous is set to OFF. If INITiate:CONTinuous is ON, sample
acquisition will continue in the manner specified by the TRIGger:CDF:DECImate setting.
Syntax:
TRIGger:CDF:TIMe <numeric_value>
Argument:
<numeric_value> = 1 to 3600 seconds
Valid Modes:
Statistical Mode only.