Agilent Technologies Agilent E1412A User Manual page 56

Measurement Format
MEASURE1
Source Code File
Comments
MEASURE2
Source Code File
Comments
54 Agilent E1412A Multimeter Application Information
in the output buffer.
Readings in the output buffer have the following characteristics:
•
Readings sent to the output buffer can consist of two different lengths
(bytes or characters) in Real ASCII format:
1.23456E12
LF
1.234567E12
•
Each measurement is terminated with a Line Feed (LF). The GPIB
End-or-Identify (EOI) signal is sent with the last byte transferred. If
multiple measurements are returned, the measurements are separated
by commas and EOI is sent only with the last byte. For example:
1.23456E12
•
The multimeter's internal memory stores 512 readings maximum.
Use the MEAS Command to Make a Single Measurement
*RST
MEAS:VOLT:DC?
enter statement
•
The command configures the multimeter for the function
MEASure
specified and initiates the measurement. The reading is stored in the
output buffer and you must provide the I/O construct to retrieve the
reading and enter it into the computer.
Making Externally Triggered Measurements (multiple triggers/samples)
*RST
CONF:VOLT:DC 18 Configure for dc volts, expected input = 18V.
TRIG:SOUR EXT
TRIG:COUN 3
SAMP:COUN 10
INIT
FETC?
enter statement
•
You must provide a TTL external trigger signal to the E1412A front
panel "Trig" input BNC. Measurements are triggered by low pulses of
this signal. Each trigger results in 10 readings.
•
The CONFigure command configures the multimeter for the function
specified. This CONFigure
18 (expected input is 18V; the multimeter sets a range to
accommodate that input which will be 100V). It does not initiate the
measurement.
or
LF
LF LF
,1.234567E12 ,1.23456E12
Reset the multimeter.
Configure dc volts (default settings) and measure
retrieve the reading from the multimeter.
Enter reading into computer
Reset the multimeter.
Set trigger source to external.
Set trigger count to 3.
Set sample count to 10 per trigger.
Puts multimeter in wait-for-trigger state. EXTernal
triggers occur here to initiate measurements.
Measurements are stored in multimeter internal
memory.
Transfer measurements from the multimeter internal
memory to the output buffer and retrieve them with
the computer.
Enter reading into computer.
command specifies a range parameter of
LF EOI
Chapter 2