Keithley 2520, Service Manual, Page: 128 / 137

B-8 Calibration Reference Model 2520 Pulsed Laser Diode Test System Service Manual
:LOW
(:CALibration:PROTected:SOURce[1]:LOW)
(:CALibration:PROTected:SOURce[1]:LOW:DATA?)
Purpose
To calibrate the low output level DAC.
Format
:cal:prot:sour1:low
Query
:cal:prot:sour1:low:data?
Description
The :CAL:PROT:SOUR1:LOW command calibrates the current source
low output level DAC. The :CAL:PROT:SOUR1:LOW:DATA? query
requests low output level DAC calibration constants. Returned con-
stants are in ASCII format separated by commas.
Example
:CAL:PROT:SOUR1:LOW
Calibrate low output level DAC.
Voltage bias source commands
:SOURce
(:CALibration:PROTected:SOURce2)
(:CALibration:PROTected:SOURce3)
Purpose To calibrate the detector 1 or detector 2 voltage bias source.
Format
:cal:prot:sour2 <DMM_reading>
:cal:prot:sour3 <DMM_reading>
Parameters <DMM_reading> = +18 to +22V
-0.5 to +0.5
-18 to -22V
Description The :CAL:PROT:SOUR2 and :CAL:PROT:SOUR3 commands cali-
brate the detector 1 or detector 2 voltage bias source respectively. Dur-
ing the calibration process, this command is sent three times, once each
with parameters of approxi20V, 0V, and -20V. The voltage
parameters are determined from a DMM reading.
Example
:CAL:PROT:SOUR2 20
Calibrate detector 1 bias source.