Table of Contents
Advertisement
Model N6705 User's Guide
Use the following commands to select a trigger source. To select Bus
triggers for output 1:
TRIG:ELOG:SOUR BUS,(@1)
To select the IMMediate trigger source for output 1:
TRIG:ELOG:SOUR IMM,(@1)
To select the EXTernal trigger source for output 1:
TRIG:ELOG:SOUR EXT,(@1)
To select Digital pin triggers on pin 3 for output 1:
TRIG:ELOG:SOUR PIN3,(@1)
Initiate and Trigger the Data Logger
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 data logger measurements on output 1:
INIT:ELOG (@1)
You can then trigger the data logger as follows:
TRIG:ELOG (@1)
If the trigger source is BUS, you can also program *TRG or <GET> to
trigger the data logger.
When triggered, the data logger 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 log Measurement
Each FETCh command returns number of requested records of the
data in the buffer and removes them, making room available for more
data. The measurement continues until it is aborted. To retrieve a
maximum of 1000 records:
FETC:ELOG? 1000,(@1)
ASCII data (the default format) is returned as comma-separated ASCII
numeric data sets of average/min/max values terminated by a
newline. ASCII queries can only fetch data from one channel at a time.
Binary data is returned as a comma-separated list of data for each
channel requested. The data for each channel is a definite length
binary block, with the byte order specified by the FORMat:BORDer
command.
Terminate the Measurement
To abort the external data logger:
ABOR:ELOG (@1)
Advanced Source and Measurement Functions 6
171
Advertisement
Table of Contents
