Keysight Technologies 81618A User Manual

Also see for 81618A: User guide

Contents

Keysight Technologies 81618A User Manual Manual pdf 98 page image

98 Keysight 81618A/9A and Keysight 81620B/3B/4B/6B/8B Optical Heads User’s Guide5 Cleaning InformationWhich Cleaning Procedure should I use?Light dirtIf you just want to clean away light dirt, observe the following procedurefor all devices:• Use compressed air to blow away large particles.• Clean the device with a dry cotton swab.• Use compressed air to blow away any remaining filament left by theswab.Heavy dirtIf the above procedure is not enough to clean your instrument, follow oneof the procedures below. Please consult Cleaning Instructions for thisDevice on page 88 for the procedure relevant for this instrument.If you are unsure of how sensitive your de vice is to cleaning, please contactthe manufacturer or your sales distributorHow to clean connectorsCleaning connectors is difficult as the core diameter of a single-mode fiberis only about 9 μm. This generally means you cannot see streaks orscratches on the surface. To be certain of the condition of the surface ofyour connector and to check it after cleaning, you need a microscope.In the case of scratches, or of dust that has been burnt onto the surface ofthe connector, you may have no option but to polish the connector. Thisdepends on the degree of dirtiness, or the depth of the scratches. This is adifficult procedure and should only be performed by a skilled person, andas a last resort as it wears out your connector.To assess the projection of the emitted light beam you can use an infraredsensor card. Hold the card approximately 5 cm from the output of theconnector. The invisible emitted light is projected onto the card andbecomes visible as a small circular spot.WARNING Never look into the end of an optical cable that is connected to an activesource.