Table; Laser Diode Voltage Measurement Ranges; Laser Diode Source Compliance - Keithley 2520 User Manual

Model 2520 User's Manual

Table 3-2

Laser diode voltage measurement ranges

Voltage
range
5V
10V

Laser diode source compliance

The laser diode current source has a maximum DC output level of 1A @ 9.9V, for a maxi-
mum power of 9.9W. Maximum pulse output level is 5A @ 9V, for a maximum pulse
power of 45W. If the load resistance is high enough so that the unit exceeds the pro-
grammed voltage limit, the unit is considered to be in compliance, and the source display
field will blink. See
unit can be programmed to generate an SRQ under compliance conditions over the GPIB
(Section
The compliance voltage is sensed at the pulser circuit board, so any I/R drops in the cables
or connections is not sensed, and no corrections are made for these resistances.
Photodiode source and measure capabilities
Each Model 2520 photodiode channel has the following current measurement and voltage
bias capabilities:
•
•
Maximum
Resolution
0.33mV ±5.25V
0.66mV ±10.5V
Section 5,
11).
Measure Current — Each Model 2520 photodiode channel can measure DC cur-
rents from 0.7µA to 105mA. Each channel has four current ranges: 10mA, 20mA,
50mA, and 100mA.
Source Voltage — Each Model 2520 photodiode bias source can output DC volt-
age from 0 to ±20V.
reading
"Source-Measure Concepts" for more information. The
Basic Operation 3-3