Keithley 2520, User Manual, Page: 223 / 329

14-34 SCPI Command Reference Model 2520 User’s Manual
For example, if you expect to source levels around 300mA, send the fol-
lowing command:
:SOURce1:CURRent:RANGe 0.3
The above command will select the 500mA range for the laser diode
current source.
As listed in Parameters , you can also use the MINimum, MAXimum
and DEFault parameters to manually select the source range. The UP
parameter selects the next higher source range, while DOWN selects the
next lower source range.
Set amplitudes
[:IMMediate][:AMPLitude] <n>
:SOURce[1]:CURRent[:LEVel][:IMMediate][:AMPLitude] <n> Set fixed current source amplitude
Parameters
<n> = 0 to 5.0 Set source amplitude (amps)
DEFault 0A
MINimum 0A
MAXimum 5.0A
Query
:CURRent? Query programmed source amplitude
:CURRent? DEFault Query *RST default amplitude
:CURRent? MINimum Query lowest allowable amplitude
:CURRent? MAXimum Query highest allowable amplitude
Description
This command is used to immediately update the amplitude of a fixed
source for both DC and pulse functions (with the pulse function, the
amplitude is the high pulse level). This command is not valid if the list
or sweep mode is selected.
NOTE
The sourcing :MODE command is used to select a fixed source. See “Select
sourcing mode,” page 14-32 .
The specified amplitude cannot exceed the selected source range. For
example, if the source is on the 500mA range, you will not be able to set
the source amplitude to 1A.
NOTE For the DC function, the current cannot be set above 1A.
LOW <n>
:SOURce[1]:CURRent[:LEVel]:LOW <n> Set current pulse low amplitude
Parameters
<n> = 0 to 0.150 Set pulse low amplitude (amps)
DEFault 0A
MINimum 0A
MAXimum 0.150A