Version 1 Issue 2
www.snellgroup.com
IQOTX30/31/32/33/34/35/36
Page 11
Attenuation
The IQOTX33/34/35/36 modules have 1550nm transmission lasers, which have
a higher optical power output than the 1310nm variety present on the IQOTX30/
31/32 modules. For link distances less than 15Km, this power is suffiecient to
saturate receivers. As a precaution, all units with 1550nm transmission lasers are
fitted with a 5dBm attenuator. For distances greater than 15Km, it may be
desirable to use the extra optical power, in which case the attenuator can be
removed.
To remove the attenuator:
1. Remove the card from the IQ enclosure.
2. Press down on the blue latch that holds the optical fiber connector in place
and withdraw the opitcal fiber.
3. Press down on the blue latch that holds the attenuator in place and remove
withdraw the attenuator from the SFP module.
4. Push the optical fiber connector directly into the SFP module. It will click
when it is in place.
5. Refit the card into the IQ enclosure.
Take care not to touch the exposed glass tip of the optical fiber.
If this does happen, clean the exposed tip with an isopropyl
alcohol wipe.
Optical Fiber Cables
Attenuator
SFP Module
Note:
