14
Quick Reference Guide
Other available data elements include laser diode source current, both bias voltages, a
timestamp, and the status word. See Section 14, “FORMat subsystem,”
of the Model 2520
User’s Manual for details on all aspects of the data format.
NOTE
The three element data string is the GPIB default condition.
SCPI commands
SCPI commands for basic laser diode testing are summarized in
Table 3
.
Table 3
SCPI commands for basic laser diode tests
Command
Description
:OUTPut[1] <state>
:READ?
:SENSe[1]:VOLTage:RANGe <range>
:SENSe[1]:VOLTage:POLarity <polarity>
:SENSe2:CURRent:RANGe <range>
:SENSe2:CURRent:POLarity <polarity>
:SENSe3:CURRent:RANGe <range>
:SENSe3:CURRent:POLarity <polarity>
:SOURce[1]:CURRent:MODE FIXed
:SOURce[1]:CURRent:RANGe <range>
:SOURce[1]:CURRent <current>
:SOURce[1]:CURRent:POLarity <polarity>
:SOURce[1]:VOLTage:PROTection <limit>
:SOURce[1]:FUNCtion <function>
:SOURce[1]:PULSe:DELay <delay>
:SOURce[1]:PULSe:WIDTh <width>
:SOURce[1]:CURRent:LOW <low_current>
:SOURce2:VOLTage <voltage>
:SOURce3:VOLTage <voltage>
Turn all sources on or off (ON or OFF).
Trigger and acquire readings.
Set laser diode voltage measure range (5 or 10).
Set laser diode measure polarity (POSitive or NEGative).
Set detector #1 measure range (0.01, 0.02, 0.05, 0.1).
Set detector #1 measure polarity.
Set detector #2 measure range (0.01, 0.02, 0.05, 0.1).
Set detector #2 measure polarity.
Select fixed (not sweep) laser diode current source mode.
Select laser diode source range (0.5 or 5).
Set laser diode source current (0 to +5.0).
1
Set laser diode source polarity (POSitive or NEGative).
Set laser source voltage compliance limit (3 to 10.5).
Select laser diode current source function (DC or PULSe).
Set laser diode source pulse delay (20e-6 to 0.5).
2
Set laser diode source pulse width (500e-9 to 5e-3).
2
Set low pulse amplitude for pulse mode (0 to 0.015, 500mA
range; 0 to 0.150, 5A range).
Set detector #1 source voltage (0 to ±20).
Set detector #2 source voltage (0 to ±20).
1
5A maximum pulse mode only. 1A maximum in DC mode.
2
Minimum and default pulse delay and width values depend on pulse duty cycle. See Model 2520 specifications.
