Wavelength Electronics Laboratory Series User Manual Download Page 21

21

CHANGE VALUES ON INSTRUMENT

Blue and yellow text denotes editable values, green and white 
text is not. Press TAB to move to the next editable fi eld.

1. On 

the 

Instrument Operation

 tab, click the blue text to 

edit. The text turns yellow when in editing mode. 

2.  Tab to or click on blue text to edit the value. 

NOTE: Tabbing to a new editable text fi eld saves changes 
made to the previous value. Manually moving the cursor to a 
new fi eld does not save the change, which reverts to the last 
saved value. 

Figure 29.   Text color indicates ability to edit

ENABLE OR DISABLE CURRENT TO 
THE LASER

Current to the laser can be enabled or disabled using a 
remote computer. When the current is enabled, the Enable 
button glows blue. 

• On 

the 

Instrument Operation

 tab, click the 

Enable 

button. 

Figure 30.   Enable button on

Figure 31.   Enable button off

RUN A VI SCAN

1. On 

the 

Instrument Operation

 tab, click the green arrow. 

Specify Data File

 window opens.

2.  Navigate to the location to save the scan data, name the 

fi le as desired, and click 

Save

.

3.  A new window opens showing the scan in progress.

• 

To stop the scan, click 

Stop Scan

. Data collected up 

to the point the scan was stopped is recorded in the 
data fi le.

4.  To dismiss the scan window, click 

Close

.

Figure 32.   VI Scan screen

END REMOTE OPERATION

Returning the instrument to local operation is accomplished 
one of two ways:

• On 

the 

Instrument Operations

 tab and at the bottom, 

click 

Close Instrument

.

• 

On the instrument, tap 

Press For Local

.

 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 

μ

sec positive 

going pulse appears on the Trigger BNC plug.

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

Summary of Contents for Laboratory Series

Page 1: ...oise QCL Instrument QCL1500 LAB 1 5 A Low Noise QCL Instrument QCL2000 LAB 2 0 A Low Noise QCL Instrument NOISESCAN Noise Characterization Scan 55 110014 SMA BNC Cable 55 110015 USB Cable WCB310 Shiel...

Page 2: ...r QCL with this patented1 driver gives you narrow linewidth stable center wavelength and repeatable scans INTUITIVE USER INTERFACE AND SUPERIOR SOFTWARE CONTROL With Wavelength s plug and play instrum...

Page 3: ...ing power To avoid fire hazard use only the specified fuse with the correct type number voltage and current ratings and use only the recommended replacement parts CAUTIONS The QCL instrument has no us...

Page 4: ...Then turn the drawer until the correct voltage label is at the top and replace it in the receptacle Press firmly to make sure the drawer is completely seated It should be flush with the receptacle Fig...

Page 5: ...blue Limit Current value and rotate the Adjustment knob to change to the desired value The instrument will beep when set NOTE The Max Supply Voltage and Cable Resistance values can be ignored for now...

Page 6: ...ground 8 Analog output current monitor 9 Analog monitor ground QCL SMA QCL negative QCL ground Figure 6 SMA Pin Out V Pin 9 QCL or SMA Outer Ring Pin 5 QCL or SMA Center Pin QCL Driver Current Sink QC...

Page 7: ...sec User adjustable EXTERNAL MODULATION MIN TYP MAX UNITS NOTES Modulation Bandwidth 2 3 MHz Sinewave Rise Fall Time 250 200 nsec To full scale Slew Rate 30 V sec Depth of Modulation 90 At 500 kHz Inp...

Page 8: ...tts at idle no output to QCL load GENERAL SPECIFICATIONS VALUE NOTES Warm up Time 1 Hour Remote Interface USB Ethernet Warranty One 1 Year Safety Tested To IEC 61000 3 2 IEC 61000 3 3 IEC 61000 4 2 IE...

Page 9: ...n signal is above the maximum drive current for the laser Over and under voltage protection circuits protect the driver and QCL if the power supply voltages fall outside of the acceptable operating ra...

Page 10: ...cal earth ground 3 QCL SMA SMA connector alternate connection to QCL 4 QCL D SUB 9 Pin female D SUB connector 5 Monitors 9 Pin male D SUB connector 6 USB USB port connection between instrument and a c...

Page 11: ...receptacle Press firmly to make sure the drawer is completely seated It should be flush with the receptacle Figure 11 Fuse Installation and Voltage Selector 5 Close the faceplate again pressing firml...

Page 12: ...ow pulses blue when on Standby and only the back panel power switch is on 2 Adjustment Knob Turn to adjust the numeric values Instrument beeps when values are set 3 Enable Button Allows instrument to...

Page 13: ...aximum Internal Supply Voltage can be lowered to minimize internal instrument temperature or to act as a compliance voltage clamp on the QCL output current See Additional Technical Notes on page 25 fo...

Page 14: ...o the USB flash drive with the filename viscanxx txt where xx starts at 00 and increments 8 To stop mid scan press the red Stop button to abort the scan Any data collected during the aborted scan is s...

Page 15: ...oltage input on this BNC sums with the DC value on the screen The input impedance is 1 k To calculate the external modulation signal voltage see the next section for the transfer function and use the...

Page 16: ...og 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 mode...

Page 17: ...rument completely off at both the front and rear panels and then turn it completely on again 2 On the Wavelength website download the ZIP file that is specific to your QCL Laboratory Series model and...

Page 18: ...instrument to the computer and a screen of all editable fields appears The computer screen is editable and the instrument screen is not NOTE One instrument can be controlled remotely at a time Figure...

Page 19: ...ENT PROFILES Profiles can be edited in Super User mode or when Normal Users are not restricted from saving profiles 1 In the Profile Editor Window and in the Available Profiles menu select a profile T...

Page 20: ...also be checked as well as the Apply Restrictions checkbox on the Advanced Options dialog box CHANGE SUPER USER PASSWORD 1 On the Instrument Operation tab click Super User 2 Type the password in the t...

Page 21: ...e button on Figure 31 Enable button off RUN A VI SCAN 1 On the Instrument Operation tab click the green arrow A Specify Data File window opens 2 Navigate to the location to save the scan data name the...

Page 22: ...rument experienced an internal fault See Error Messages on page 24 Switch the back panel power button off and then on again and turn the front panel power button on The internal temperature has reache...

Page 23: ...ser increase the output current limit setting When actively operating in current limit the safety circuits add noise to the output If I run my QCL at about 5 of maximum output current the transfer fun...

Page 24: ...ions The instrument cannot drive current through the load Make sure the QCL SMA or Pins 5 9 of the QCL D SUB are connected A short circuit was detected at the load terminals Please verify the load and...

Page 25: ...p NOTE If you reach 18 V on the MAX Supply Voltage input and the current is still not compliance voltage limited the instrument is operating at its lowest voltage and the voltage limit cannot be reduc...

Page 26: ...L1500 at 1 15 A with 10 Test Load Figure 35 600 kHz Output Plot QCL1500 at 1 15 A with 10 Test Load REMOVE THE BAIL AND FEET FROM AN INSTRUMENT To make sure there is the proper clearance between stack...

Page 27: ...27 MECHANICAL SPECIFICATIONS 0 72 3 89 0 66 16 8 3 92 99 6 6 10 154 9 8 49 215 6 Dimensions are in inches mm Tolerance is 5 8 860 225 0 3 47 88 14 8 860 225 0 16 35 415 16 35 415 17 72 450 3 47 88 14...

Page 28: ...CABLE REGULATIONS European Council Directive 2004 108 EC December 15 2004 on Electromagnetic Compatibility tested to IEC 61000 3 2 and IEC 61000 3 3 IEC 61000 4 2 IEC 61000 4 3 IEC 61000 4 4 IEC 61000...

Page 29: ...CE The information contained in this document is subject to change without notice Wavelength will not be liable for errors contained herein or for incidental or consequential damages in connection wit...

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