Keithley 2520, User Manual, Page: 221 / 329

14-32 SCPI Command Reference Model 2520 User’s Manual
SOURce subsystem
This subsystem is used to configure and control the laser diode current source, the two
detector voltage bias sources, and to set the logic level (high or low) of each digital output
line. The commands for this subsystem are summarized in
Table 14-6 .
SOURce[1]
Use the following commands to configure and control the laser diode current source.
NOTE See Section 5 for pulse and sweep waveform definitions.
Control source outputs on-off
[:IMMediate]
:SOURce[1]:CLEar[:IMMediate] Turn source outputs off
Description
This command is used to turn off all three sources and performs the
same function as the :OUTPut OFF command.
NOTE The SOUR1:CLEar command is global and turns off all three source outputs.
Select sourcing mode
MODE <name>
:SOURce[1]:CURRent:MODE <name> Select laser diode sourcing mode
Parameters
<name> = FIXed Select fixed sourcing mode
LIST Select list sourcing mode
SWEep Select sweep sourcing mode
Query
:MODE? Query sourcing mode
Description
This command is used to select the sourcing mode for the laser diode
current source. The three modes are explained as follows:
FIXed
— In this sourcing mode, the source will output a fixed level. Use
the :RANGe and :AMPLitude commands to specify the fixed source
level. See
“Select source range,” page 14-33 , and “Set amplitudes,”
page 14-34 .
LIST — In this mode, the source will output current pulses that are spec-
ified in a list. See “Configure list,” page 14-41 , for commands to define
and control the execution of the list.
SWEep
— In this mode, the source will perform a staircase current
sweep. See “Configure sweeps,” page 14-37 , for commands to define
the sweep.