Agilent Technologies 4288A, Руководство по программированию

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62 Chapter 6
Reading Out Measured Result
Reading Out Measured Result
Reading out measured result using
*TRG
command
This command actually performs two tasks: it triggers the instrument and returns the
results. It is useful, for example, when you want to retrieve measurement results
immediately after triggering the instrument from an external controller.
The readout procedure using the
*TRG
command is described below.
Step 1. Use the
:TRIG:SOUR
command on page 196 to set up the trigger mode to the GPIB
trigger (Bus).
Step 2. Execute the
*TRG
command.
Step 3. Read out the measured result. To repeat the measurement, repeat Steps 2 and 3.
Example 6-1 and Example 6-2 show sample programs using the
*TRG
command. Example
6-1 is for the ASCII transfer format and Example 6-2 is for the binary transfer format.
These programs are stored on the sample program disk under the filenames “trg_a.bas” and
“trg_b.bas.”
These programs read out the measurement status, measured primary parameter result,
measured secondary parameter result, and comparator sorting result (when the comparator
function is ON) and then display this information.
The program of Example 6-1 is detailed below.
Line 60 Sets the GPIB address.
Line 70 Sets the data transfer format to the ASCII format.
Lines 90 to 100 Turns ON the trigger system continuous startup and sets the trigger
mode to the GPIB trigger.
Lines 120 to 130 Reads out the ON/OFF state of the comparator function and assigns it
to the Comp_flag variable.
Lines 170 to 210 After the trigger system state transitions to the trigger wait state,
triggers the instrument.
Line 230 If the Comp_flag value is 1 (the comparator function is ON), reads out
the measurement status, measured primary parameter result, measured
secondary parameter result, and comparator sorting result.
Line 250 If the Comp_flag value is not 1 (the comparator function is OFF),
reads out the measurement status, measured primary parameter result,
and measured secondary parameter result.
Lines 300 to 320 Displays the measurement status, measured primary parameter result,
and measured secondary parameter result.
Line 340 If the Comp_flag value is 1 (the comparator function is ON), displays
the comparator sorting result.
Line 360 If the Comp_flag value is not 1 (the comparator function is OFF),
displays “Comparator : OFF.”