Specifications

Funea Broadband Services bv product information page 28 of 31
version: 11-02
• Caution: Do not extend the connector by more than 1 cm from the body of
the ES10.
7 TROUBLESHOOTING
To avoid problems with the BK-ES10 and 1550 nm transmission there are some general
rules which are important to follow.
• Use carefully cleaned angled connectors like SC/APC, FC/APC, E2000 and similar ones
only for the whole transmission system between optical transmitter and receiver. A
mix of angled and non angled connectors will result in high insertion loss, and a
degradation of the CSO and CNR performance.
• Avoid bending losses of fiber optic cables. Since optical transmission on 1550 nm
significantly more sensitive to bending losses it is very important to avoid narrow
curvatures
• Use a proper levelled, flat RF-input signal. The flatness of the input signal (e.g. ± 1
dB) will directly result in the same variation of CNR, CSO and CTB (in this example: ±
1 dB).
• Be careful to understand all non-linearity’s in optical fibers with 1550 nm
transmission, long distances and high optical powers. CNR and CSO can easily
degraded due to self phase modulation and Brillouin scattering. In doubts check the
performance of the link by using an optical attenuator instead of using optical fiber
to see whether the performance is limited due to impacts from the fiber.
• In case of technical questions please ask our sales representative.
• Note: Since the transmitter is working internally with very high optical
power and microwave signals it is not admitted to open the transmitter for
personal safety and EMC reasons. Do not open the transmitter! In case of
other than fan/power supply failures the transmitter has to be sent to
BKtel for maintenance!