12: SCPI command reference 2470 High Voltage SourceMeter Instrument
12-84 2470-901-01 Rev. A / May 2019
: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 Affected by Where saved Default value
Instrument reset
Power cycle
Source configuration list
Source configuration list
Usage
:SOURce[1]:VOLTage:READ:BACK <state>
:SOURce[1]:VOLTage:READ:BACK?
:SOURce[1]:CURRent:READ:BACK <state>
:SOURce[1]:CURRent:READ:BACK?
Disable read back: 0 or OFF
Enable read back:
or
Details
When source readback is off, the instrument records and displays the source value you set. 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
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
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
Also see
:SOURce[1]:FUNCtion[:MODE] (on page 12-80)
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