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2308-900-01 Rev. A / July 2008
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Section Topics
9-3
Model 2308 Portable Device Battery/Charger Simulator User’s Manual
Section 9: Measurement Commands and Optimizing Measurement Speed
Command notes: Signal-oriented measurement commands and
queries
:FETCh[1]?
Return last reading for the battery channel (#1)
:FETCh[1]:ARRay?
Return last array of readings for the battery
channel (#1)
:FETCh2?
Return last reading for the charger channel
(#2)
:FETCh2:ARRay?
Return last array of readings for the charger
channel (#2)
The :FETCh? command is used to return the last averaged reading, and the
:FETCh:ARRay?
command is used to return the last array of readings. After sending either one of these commands
and addressing the power supply to talk, the averaged reading or reading array is sent to the
computer. These commands do not affect the instrument setup.
These commands do not trigger measurements but are triggered before reading(s). They return
the last triggered averaged reading or reading array. Note that they can repeatedly return the
same reading or reading array. Until there is a new triggered reading(s), these commands continue
to return the old triggered reading(s).
The number of readings to average or put in an array is set using the
SENSe:AVERage
(for
voltage, current and DVM readings) or
SENSe:PCURrent:AVERage
(for pulse-current readings)
command. See
Section 2
and
Section 3
for details.
:READ[1]?
Trigger and return reading for the battery
channel (#1)
:READ[1]:ARRay?
Trigger and return array of readings for the
battery channel (#1)
:READ2?
Trigger and return reading for the charger
channel (#2)
:READ2:ARRay?
Trigger and return array of readings for the
charger channel (#2)
The
:READ?
command is used to trigger and return a single averaged reading, and the
:READ:ARRay?
command is used to trigger and return an array of readings for the currently
selected function on the applicable channel (the battery channel being the default and the charger
channel requiring a 2 to be appropriately added to the command string). The averaged reading or
NOTE
For all array queries, make sure the computer’s buffer is large enough to
accommodate all array readings. Overflow readings exponential format =
+9.9E37.
For all non-array queries, the overflow readings exponential format also =
+9.9E37.
NOTE
1.
FETCh?
and
FETCh:ARRay?
readings are sent in the form indicated by
the
FORMat[:DATA]
setting.
2. There are no AVERage commands for long integration measurements.
The array size for long integration readings is fixed at one. Therefore,
both
FETCh?
and
FETCh:ARRay?
will return the last reading.
Summary of Contents for 2308
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