User`s manual

Making an Externally Triggered Scan
This example makes one scan through a channel list when the multimeter
receives an external trigger.
10 !Dimension a computer array to store the readings.
20 DIM Rdgs(1:16)
30 !
Clear and reset the multimeter.
40 CLEAR 70903
50 OUTPUT 70903;"*RST"
60 !
Configure the multimeter for DC voltage measurements. Set the
70 !
trigger source to an external trigger. Scan the channel list one time
80 !when the trigger is received.
90 OUTPUT 70903;"CONF:VOLT:DC (@100:115)"
100 OUTPUT 70903;" TRIG:SOUR EXT"
110 OUTPUT 70903;"READ?"
120 !
Enter and display the readings on the computer.
130 ENTER 70903;Rdgs(*)
140 FOR
I=1 TO 16
150 PRINT Rdgs(
I)
160 NEXT
I
170 END
Comments
• The multimeter is triggered when a high-to-low TTL signal is
applied to the "External Trigger" port.
• CONFigure sets the trigger source to the multimeter’s internal
trigger. The trigger source is changed with the
TRIGger:SOURce
command. The sources available are:
IMM - immediate (internal) trigger
EXT - external trigger
BUS - triggered by *TRG or HP-IB group execute trigger
HOLD - suspend trigger
• If programmed for multiple scans, multiple external triggers must
occur since each scan requires a trigger.
Chapter 3 Using the HP E1326B/E1411B Multimeter 49