Keysight Technologies 8163A User Manual

Contents

Keysight Technologies 8163A User Manual Manual pdf 157 page image

156 8163A/B, 8164A/B, 8166A/B User’s Guide5 Tunable LasersHow to Set the Modulation Mode8 Move to the modulation source parameter, [Mod Src], and press Enter.9 Move to <Internal>, by using the cursor key, and press Enter. The textInt appears in the Tunable Laser channel.How to Use External ModulationThe following external modulation modes are available:• <External Digital> - External Digital Modulation• <External Analog> - External Analog Modulation• <Wavel. Locking> - Wavelength Locking• <Backplane> - External Digital Modulation using Input Triggerconnector or Trigger Feedback from another module in the samemainframe.• <Coherence Ctrl.> - Coherence ControlExternal Digital ModulationExternal digital modulation uses a TTL-level signal. Apply this signal to theinput BNC connector on the front panel of your Tunable Laser module.CAUTION There are two BNC connectors on the front panel of the 814xxB, 816xxBand 8160xA tunable laser modules, a BNC input connector and a BNCoutput connector.There is one BNC connector on the front panel of the 81689A and819xxA compact tunable laser modules, a BNC input connector.An absolute maximum of ±6 V can be applied as an external voltage toany BNC connector.