QCL-LAB datasheet(16/24 Pages) WAVELENGTH

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ADDITIONAL CAPABILITIES

ANALOG CURRENT MONITOR

This signal is the sum of the DC setpoint as shown on the

screen and the external modulation input.

To monitor the analog current level:

1. Connect the Analog output Current Monitor (PIN 8) on the

MONITOR D-SUB to an oscilloscope.

2. Connect an Analog Monitor Ground (PIN 7 or PIN 9) to

oscilloscope ground.

SETPOINT CURRENT MONITOR

This is a reference only and can be off by as much as 5%

when setpoint is >10% of full scale.

To monitor the setpoint current:

1. Measure the voltage on the Analog Setpoint Monitor

(PIN 6).

2. Ground for that measurement is the Analog Monitor

Ground (PIN 7 or PIN 9).

The setpoint monitor and analog current monitor transfer

functions depend on the QCL instrument model and are all

as follows:

QCL500 LAB:

0.1 A / V.

QCL1000 LAB:

0.2 A / V.

QCL1500 LAB:

0.3 A / V.

QCL2000 LAB:

0.4 A / V.

The input range is always 0 – 5 V.

ALIGNMENT LED DRIVE

+5 V, up to 250 mA sourced.

To drive an alignment LED, on the MONITOR D-SUB

1. Connect an LED to the Alignment LED +5V (PIN 1).

2. Ground the LED at the Alignment LED Ground (PIN 2).

ENABLE STATUS INDICATOR

This is a +5 V TTL indicator. If current to the QCL output

is enabled, the voltage between PIN 3 and PIN 4 on the

MONITORS D-SUB will be low. It will be high if current is

disabled.

USE THE TRIGGER SIGNAL

A trigger signal is provided so that external measurement

equipment can be synchronized with laser current. Exactly

10 msec after a remote change in setpoint, a 20 µsec positive

going pulse appears on the Trigger BNC plug.

To use the Trigger, connect a BNC cable to the TRIGGER

BNC output.

INSTALL THE QCL LABVIEW

INTERFACE APPLICATION

Complete installation instructions can be found in the LAB

Series Virtual Instrument Operating Guide.

The instructions explain how to download the .EXE file. If you

would like a copy of the .VI file, contact Technical Support.

USE REMOTE COMMANDS AND

NATIONAL INSTRUMENTS DAQ

CARD

Complete documentation of the remote commands supported

by the QCL LAB instrument can be found in the Remote

Command Set.

CUSTOM VIRTUAL INSTRUMENTS

Wavelength also offers custom Virtual Instrument applications

tailored to your specific needs. Contact Technical Support for

more information.

REMOTE OPERATING

INSTRUCTIONS

The following instructions are for QCL LAB Series

instruments running firmware Version 1.5 and

later. These use the LabVIEW Virtual Instrument

application or the Remote Command Set.

QCL-LAB Datasheet(PDF) 16 Page - Wavelength Electronics, Inc.

QCL-LAB Datasheet(HTML) 16 Page - Wavelength Electronics, Inc.

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