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Front Panel Menu Reference
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Initiate and Trigger the Elog
When the power supply is turned on, the trigger system is in the Idle state. In this state, the trigger
system is disabled, ignoring all triggers. The INITiate command enables the measurement system to
receive triggers. To initiate and trigger the Elog:
Front Panel Menu Reference
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When triggered, the Elog starts placing data in the internal measurement buffer. Because the buffer is
only large enough to hold 20 seconds of accumulated measurement your PC application must
periodically retrieve (or fetch) the data from this buffer.
Periodically Retrieve the Data
Each FETCh command returns number of requested records of the data in the buffer and removes
them, making room available for more data. The Elog continues until it is aborted.
An Elog record is one set of voltage and current readings for one time interval. The exact format of a
record depends on which functions have been enabled for Elog sensing. If all functions are enabled,
then one record will contain the following data in the specified order:
Current average
Current minimum
Current maximum
Voltage average
Voltage minimum
Voltage maximum
Front Panel Menu Reference
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Keysight RP7970 & RP7980 Series Operating and Service Guide
SCPI Command
To select Bus triggers:
TRIG:ELOG:SOUR BUS
To select an immediate trigger:
TRIG:ELOG:SOUR IMM
To select digital pin 5 as the trigger:
TRIG:ELOG:SOUR PIN5
To select any pin configured as a trigger input:
TRIG:ELOG:SOUR EXT
SCPI Command
To initiate the Elog:
INIT:ELOG
To trigger the Elog:
TRIG:ELOG
Alternatively, if the trigger source is BUS, you can also program a
or an IEEE-488 <get> command.
SCPI Command
To retrieve a maximum of 1000 records:
FETC:ELOG? 1000
4 Using the Regenerative Power System
*TRG
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