Keithley 2001 User Manual

IEEE-488 Reference
4-217
Sending a value that exceeds the defined size of the buffer (see :POINts) will generate an error.
The command will be ignored.
Programming example 10 OUTPUT 716; “:trac:poin 75”
20 OUTPUT 716; “:trac:feed:pret:amo:read 30; read?”
30 ENTER 716; A$
40 PRINT A$
50 END
Line 10 Sets buffer size to 75 points.
Line 20 Two commands in this program message; the first specifies 30 buffer points for
pre-trigger readings, and the second queries the number of buffer points.
Line 30 Addresses the Model 2001 to talk.
Line 40 Displays the number of pre-trigger buffer points.
:SOURce [BUFFER,] <name>
:TRACe:FEED:PRETrigger:SOURce [BUFFER,] <name> Specify pre-trigger event
Parameters <name> = EXTernal Use External Trigger as pre-trigger event
= TLINk Use Trigger Link as pre-trigger event
= BUS Use bus trigger as pre-trigger event
= MANual Use TRIG key as pre-trigger event
Format :trac:feed:pret:sour <name>
Defaults Power-up MANual
*RST No effect
:SYSTem:PRESet No effect
Query :SOURce? [BUFFER,] Query buffer source.
Short-form format: :trac:feed:pret:sour?
Response message: EXT, TLIN, BUS or MAN
Description This command is used to specify the event for the pre-trigger storage mode. With the pre-trigger
mode selected (:CONTrol, PRETrigger), readings will be continuously stored in the buffer while
waiting for the pre-trigger source event.
With EXTernal source selected, an external trigger via the rear panel EXTERNAL TRIGGER
Input will provide the pre-trigger event.
With TLINk selected, an input trigger via the Trigger Link will provide the pre-trigger event.
The Trigger Link line used for the input trigger is programmed from the Trigger subsystem (see
:TRIGger:TCONfigure command path).
With BUS selected, a GPIB bus trigger (GET or *TRG) will provide the pre-trigger event.
With MANual selected, pressing the front panel TRIG key will provide the pre-trigger event.
Once the pre-trigger event occurs, the buffer will take (points - pre-trigger amount) more
readings then stop.

Keithley 2001 Specifications

General

Model	2001
Category	Multimeter
Manufacturer	Keithley
Type	Digital Multimeter
Digits of Resolution	7.5
DC Voltage Range	100 mV to 1000 V
AC Voltage Range	100 mV to 750 V
Frequency Range	3 Hz to 500 kHz
Connectivity	GPIB, RS-232
Display	VFD
Resistance Accuracy	0.008% + 2.0 mΩ
Frequency Accuracy	±0.01%
DC Current Range	10 μA to 3 A
AC Current Range	10 μA to 3 A
Power Supply	100 V to 240 V AC, 45 Hz to 66 Hz