IQOTR31
www.snellgroup.com
Attenuation
Issue 1 Rev 1
Page 13
©
2012 Snell Limited
5.
Attenuation
The IQOTR31 has 1550 nm transmission lasers. The lasers have a higher optical power
output than the 1310 nm variety. For link distances less than 15 km, this power is suffiecient to
saturate receivers. As a precaution, all units with 1550 nm transmission lasers are fitted with a
5 dBm attenuator. For distances greater than 15 km, 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.
Note:
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
