HP E1351A User Manual page 66

Example
66 HP E1351A/53A 16-Channel FET Multiplexer Command Reference
•
Scanning Operation: With a valid channel list,
INITiate[:IMMediate]
channel in the channel list. Successive triggers from the source
specified by TRIGger:SOURce
channel list.
•
Stopping Scan: See the
•
Related Commands:
•
*RST Condition: All multiplexers channels are open.
Scanning Using External Instruments
The following example shows how to scan channels using the HP E1300A/
E1301A Mainframe via HP-IB and an HP 3457A Digital Multimeter. This
example uses the mainframe's "Trig Out" port to synchronize the
multiplexer module in a switchbox to the multimeter. The trigger pulse
from the port triggers the multimeter for a measurement. See Chapters 2
and 3 for typical user connections to the multiplexer.
The computer used in the example is an HP Series 200/300 with HP BASIC
as the program language. The computer interfaces with the mainframe over
HP-IB. Assumed is an HP-IB select code of 7, an HP-IB primary address of
09 and 22 for the HP E1300A/E1301A Mainframe and HP 3457A
Multimeter, respectively, and an HP-IB secondary address of 14 for the
switchbox.
10 OUTPUT 722;"TRIG EXT;DCV"
20 OUTPUT 70914;"OUTP ON"
30 OUTPUT 70914;"TRIG:SOUR BUS" !Sets switchbox to receive bus
40 OUTPUT 70914;"SCAN:MODE VOLT"!Sets switchbox to measure
50 OUTPUT 70914; "SCAN:PORT ABUS"!Sets switchbox to close the
60 OUTPUT 70914;"SCAN (@100:115)"!Selects the channel list
70 OUTPUT 70914;"INIT"
80 FOR I = 1 TO 16
90 ENTER 722;A
100 PRINT A
110 TRIGGER 70914
120 NEXT I
130 END
starts the scanning cycle and closes the first
advances the scan through the
command.
ABORt
,
TRIGger TRIGger:SOURce
!Sets multimeter to external trigger
and to measure dc volts
!Enables "Trig Out" port
triggers
voltage during scanning
appropriate tree switches during
scanning
!Starts scanning cycle
!Start count loop
!Enter reading into variable A
!Print reading in variable A
!Trigger the switchbox to advance
the channel list
!Increment count
Chapter 5