Keysight N777-C Series Tunable Laser Family User’s Guide 109
Maintenance 6
 
Before you make any connection you must ensure that all cables and 
connectors are clean. If they are dirty, use the appropriate cleaning 
procedure.
When inserting the ferrule of a patchcord into a connector or an adapter, 
make sure that the fiber end does not touch the outside of the mating 
connector or adapter. Otherwise you will rub the fiber end against an 
unsuitable surface, producing scratches and dirt deposits on the surface of 
your fiber. 
What materials do I need for proper cleaning?
Some Standard Cleaning Equipment on page 109 is necessary for cleaning 
your instrument. 
Standard Cleaning Equipment
Before you can start your cleaning procedure you need the following 
standard equipment:
• Dust and shutter caps
•Isopropyl alcohol
•Cotton swabs
• Soft tissues 
•Compressed air 
Dust and shutter caps
All of Keysight Technologies’ lightwave instruments are delivered with 
either laser shutter caps or dust caps on the lightwave adapter. All cables 
come with covers to protect the cable ends from damage or 
contamination.
We suggest these protected coverings should be kept on the equipment at 
all times, except when your optical device is in use. Be careful when 
reattaching dust caps after use. Do not press the bottom of the cap onto 
the fiber too hard, as any dust in the cap can scratch or pollute your fiber 
surface.
Isopropyl alcohol
This solvent is usually available from any local pharmaceutical supplier or 
chemist's shop.
If possible avoid using denatured alcohol containing additives. Instead, 
apply alcohol used for medical purposes. 
Never try to drink this alcohol, as it may seriously damage to your health.