Olson Technology OTOT-1000C-9-FQ - Manual (Page 5)

OPTICAL CONNECTORS AND CLEANING
INTERNAL CONTROLS
DISTANCE LIMITATION
The standard optical connector is an SC/APC. In order to use FC/APC connectors, you
must order a conversion kit, OTLL-SCFCKIT. The standard optical connector location is
on the opposite side from the RF connector. The connector can be moved to the other
side by swapping it with a cover plate. Only a screwdriver is required for this operation.
The fiber ends can be damaged by the insertion of contaminated connectors. Some
types of customer damage to connectors are not covered under warranty. Fiber
connectors should never be left uncovered. Pre-packaged alcohol wipes are the most
convenient means of cleaning optical connectors. Clean alcohol and lint free wipes,
such as Kim-Wipe type 34155, or swabs may also be used.
There are no internal user adjustments. The only reason to open the unit would be to
move the fiber connector to the other end of the unit. This should be done before the unit
is attached to a rack mount kit. The unit should not be operated for long periods of time
without a top cover. This can cause RF radiation and ingress problems. The internal
cooling is also reduced when uncovered. Be sure to replace and tighten all top cover
screws. Oscillation or RF radiation can be caused by loose or missing screws. There is
no user adjustable internal laser power adjustment. Any change to the laser power will
result in poorer modulation characteristics and reduced link performance.
Most fiber optic transmitters are attenuation limited. In other words, the amount of
optical power that reaches the optical receiver is usually the only factor that determines
the CATV performance. Directly-modulated 1550nm transmitters, such as the OTOT-
1000C-FQ, also have a distance limitation. The OTOT-1000C-FQ will offer the best
performances at short fiber distances. As the fiber distance increases, the second order
distortion will generally degrade. The maximum specified operating distance for the
OTOT-1000C-FQ with standard SMF-28 fiber is 20km. This increases to 50km with NZ-
DSF fiber. This type of transmitter is often used with an EDFA with launch powers up to
+16dBm per fiber and optical splitters to drive a large number of receivers, at transmit-
ter-to-receiver distances of 20km or less with standard SMF-28 fiber.
NEVER clean optical
connectors with optical power present!
NEVER clean optical
connectors with optical power present!