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数据搜索系统，热门电子元器件搜索 |
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数据搜索系统，热门电子元器件搜索 |
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QCL-LAB 数据表(PDF) 18 Page - Wavelength Electronics, Inc. |
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QCL-LAB 数据表(HTML) 18 Page - Wavelength Electronics, Inc. |
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18 / 24 page  18 PROBLEM POTENTIAL CAUSES SOLUTIONS Noise current is higher than expected. There may be ground loops in the system; some system components may be higher noise than expected; cabling and shielding may be inadequate. Refer to Wavelength Electronics Application Note AN-LD08: Manage Grounding to Minimize Noise with the QCL Drivers: www.teamwavelength.com/download/ applicationtechnotes/an-ld08.pdf Also reference AN-LD09: Troubleshooting Low Noise Systems: www.teamwavelength.com/download/ applicationtechnotes/an-ld09.pdf The output switched off unexpectedly The instrument detected an internal error. (See Error Messages on page 19.) Switch the back panel power button off and then on again, and turn the front panel power button on. The internal temperature has exceeded 70ºC. Allow the instrument to cool down and then press the front panel power button. 20 kHz noise is in the output current QCL driver is operating in current limit. If safe for the quantum cascade laser, 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 function becomes non-linear and I see distortion in my output current waveform. QCL driver resolution is too low. Select a QCL driver with a much lower maximum output current. For example, to run 50 mA, request a QCL125 (125 mA maximum output). My instrument doesn’t show up in the list. ( Remote Only) Your instrument may not be turned on. Power up the instrument and click Refresh on the Choose Instrument window. Your instrument may not be plugged in to the computer. Check that either a USB or Ethernet cable is tightly connected to the instrument and to the computer. Your instrument may be on a different sub-net. Add the sub-net to the Choose Instrument window and then click Refresh. Actual current does not match the setpoint. The setpoint exceeds the limit current setting. If the limit current can be increased without damage to the QCL, increase the limit current setting. The QCL is compliance voltage limited. Increase the Max Supply Voltage slightly to see if actual current increases. Follow the instructions on page 20 to optimally set the Max Supply Voltage. |
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