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6 Advanced Source and Measurement Functions
BUS
EXTernal
IMMediate
PIN<n>
176
Seamless Measurements
For Agilent Models N6781A and N6782A only, you can select
seamless voltage and current measurements. The Auto selection
provides seamless measurement ranging, which results in a wide
dynamic range with no data being lost across ranges. Autoranging
does not include the 10 μA range, which must be selected manually.
To select current autoranging on channel 1:
SENS:HIST:CURR:RANG AUTO,(@1)
Specify the Trigger Source
The TRIGger:HIST command generates an immediate trigger
regardless of the trigger source. Unless you are using this command,
select a trigger source from the following:
Selects GPIB device trigger, *TRG, or <GET> (Group Execute Trigger).
Selects the trigger input BNC connector. Requires a low-true trigger signal.
Selects the immediate trigger source. This
when initiated.
Selects a pin on the digital port. <n> specifies the pin number. The pin must be
configured as a Trigger Input to be used as a trigger source (see Appendix C).
Use the following commands to select a trigger source. To select Bus
triggers for output 1:
TRIG:HIST:SOUR BUS,(@1)
To select the IMMediate trigger source for output 1:
TRIG:HIST:SOUR IMM,(@1)
To select the EXTernal trigger source for output 1:
TRIG:HIST:SOUR EXT,(@1)
To select Digital pin triggers on pin 3 for output 1:
TRIG:HIST:SOUR PIN3,(@1)
Initiate and Trigger the Histogram
When the DC Power Analyzer 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 histogram measurements on output 1:
INIT:HIST (@1)
You can then trigger the histogram as follows:
TRIG:HIST (@1)
(If the trigger source is BUS, you can also program *TRG or <GET>.)
When a histogram measurement is initiated and triggered, the
current is continuously sampled. Histograms sample at the rate of
20.48 microseconds per sample. Each sampled value is compared to
triggers the histogram immediately
Model N6705 User's Guide
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