Olson Technology MUSCLE-EM55X - Manual (Page 53)

OTOT-EM55X/XL Optical Transmitter Rev. x1 www.olsontech.com
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Changing the SBS Threshold
The picture below shows, how to change the SBS suppression (threshold) between 13.0 and 19.0dBm for the
OTOT-EM55XL (be aware that the OTOT-EM55X has a fixed SBS threshold of 16dBm). It is important to understand,
that the SBS setting has a major impact on the transmission performance, especially for very long fiber transmission
(e.g. 100km) and high frequencies (860MHz). The SBS suppression can be adjusted in 0.5dB steps (calibrated). From
NEC application software release 1.11 the adjustment can be carried out in 0.1dB-steps, which are in this case inter-
polated, the 0.5dB steps are still calibrated.
Figure 41 — Changing the SBS Threshold of the OTOT-EM55XL