Keithley 237

tion can be displayed with the SELECT buttons. With the
desired
sweep end selection displayed, press ENTER
The following message
will then be displayed:
SAVE?ENTER/C~CEL
Step 7. Save Trigger Configurations
To save the entered trigger selections, press ENTER The
unit will return to the source-measure display state.
Pressing
C~CEL will default the triggers to the previ-
ously
programmed selections.
2.22. 7 IEEE-488 Operation
The T, R and, H commands are used for trigger opera-
tions over the IEEE-488 bus.
The T command is
used to configure the triggers:
T( origin) ,(in),( out) ,(sweepend)
origin -Input trigger origin:
0 = Trigger
on "X"
1 = Trigger
on GET
2 = Trigger
on External Input
3 = Immediate trigger only
in - Input trigger effect:
0 = Continuous
1 =
"SRC DLY MSR
2 = SRC"DLY MSR
3 =
"SRC"DLY MSR
4=SRCDLY"MSR
5 =
A5RC DLY "MSR
6 = SRC"DLY"MSR
7 = "SRC"DLY"MSR
8 = Single Pulse
out- Output trigger generation:
O=None
1 = SRC"DLY MSR
2 =
SRC DLY"MSR
3 = SRC"DLY"MSR
+
+
SECTION2
Operation
4 = SRC DLY MSR"
5 = SRC"DLY MSR"
6 = SRC DLY"MSR"
7 = SRC"DLY"MSR"
8=PulseEnd
sweep end -Output trigger generation
0
=Disable
1 =Enable
NOTE
A trigger is always
needed to start a sweep.
The R
command is used to enable/ disable triggering:
RO = Disable triggering
Rl = Enable triggering
The H
command is used for immediate triggering:
HO = Cause immediate trigger over the bus
Sending HO over the bus is analogous to pressing the
front
panel MANUAL trigger button.
HP BASIC 4.0 Programming Example:
The following program statement Will configure the trig-
gers as follows; trigger
on GET (origin), single pulse in-
put trigger (in), no output triggers (out), and enable out-
put trigger after the end of a sweep (sweepend):
OUTPUT 716; "T1,8,0,1X"
Configure triggers
Complete information
on the IEEE-488 bus and these
commands can
be found in Section 3 of this manual.
2.23 PERFORMING A SWEEP
With the Source Measure appropriately configured, a
sweep is performed by placing the unit in OPERATE and
providing the trigger(s) needed to start/ control the
sweep.
The following steps summarize the basic steps to per-
form a sweep:
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