Source[1]:<Function>:Read:back - Keithley 2450 Reference Manual

Model 2450 Interactive SourceMeter® Instrument Reference Manual
:SOURce[1]:<function>:READ:BACK
This command determines if the instrument records the measured source value or the configured source value
when making a measurement.
Type
Command and query
Query
:SOURce[1]:VOLTage:READ:BACK <b>
:SOURce[1]:VOLTage:READ:BACK?
:SOURce[1]:CURRent:READ:BACK <b>
:SOURce[1]:CURRent:READ:BACK?
<b>
Details
When you use the configured source value (source readback off), the instrument records and displays the value
that was configured. When you use the actual source value (source readback on), the instrument measures the
actual source value immediately before making the device under test measurement.
Using source readback results in more accurate measurements, but also a reduction in measurement speed.
When source readback is on, the front-panel display shows the measured source value and the buffer records
the measured source value immediately before the device-under-test measurement. When source readback is
off, the front-panel display shows the configured source value and the buffer records the configured source value
immediately before the device-under-test measurement.
Example
*RST
TRAC:MAKE "MyBuffer", 100
SOUR:FUNC VOLT
SENS:FUNC "CURR"
SOUR:VOLT:READ:BACK ON
SOUR:VOLT 10
COUNT 100
OUTP ON
READ? "MyBuffer"
OUTP OFF
TRAC:DATA? 1, 100, "MyBuffer", SOUR, READ
Also see
:SOURce[1]:FUNCtion[:MODE]
2450-901-01 Rev. B/September 2013
Affected by
Recall settings
Instrument reset
Power cycle
Source configuration list
Disable read back: 0 or OFF
Enable read back: 1 or ON
(on page 6-72)
Section 6: SCPI command reference
Where saved
Save settings
Source configuration list
Reset the instrument to default
settings.
Make a buffer named "MyBuffer"
that can hold 100 readings.
Set source function to voltage.
Set the measurement function to
current.
Set read back on.
Set the instrument to take 100
readings.
Turn the output on.
Take a measurement (100
readings).
Turn the output off.
Get the source values and
measurements from the buffer.
Default value
1 (ON)
6-77