Keysight N774-C & 8162-C Series User’s Guide 39
Getting Started 2
Heat Sink for 81628C optical Head
The 81628C optical head has a heat sink that allows an extended
operating power range. For optical power higher than +34 dBm the
attached heat sink MUST be used.
For continuous optical power or average optical power higher than +38
dBm the connector adapters will get warmer than permitted according to
the safety standard IEC 61010-1.
The 81628C Optical Head can handle optical power up to +40 dBm,
however, operation above +38 dBm is at the operators own risk.
Attaching the Heat Sink to the 81628C Optical Head
Applicable Adapters
Keysight adapters types 81000xx, 81000BT are applicable to the 81628C
with the heat sink attached (without the heat sink and up to 34 dBm the
81000BT bare fiber adapter may be attached). Bare fibers are not intended
to be used in high power applications.
Always attach the heat sink and rubber ring to the 81628C if operating at
an optical power higher than 34 dBm.
If shipping the 81628C high power optical head please detach the
heat sink from the optical head to avoid damage during transportation.
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