Alarm Menu; Agc Mode; Mgc Mode; Sbs Suppression Adjustment - Prevail-Catv WT-1550-EM10 Operating Manual

3.4.4 Alarm Menu

The displayed alarm content
RF IN Status
Laser Bais
Laser TEC
OutPutPower Status
-5V Status
+5V Status
+12V Status
-12V Status
+24V Status
Laser
CSO Initialization failed
Power invalid

3.4.5 AGC Mode

This mode is the recommended mode and also the standard operation.
The optical transmitter will automatically adjust to the optimal gain while the input
level is in the working range (see the technical data sheet). And the specified OMI
(rms) modulation index will be automatic gain control.

3.4.6 MGC Mode

Special users, who need to adjust system CNR/CSO/CTB performance indexes to
satisfy the specified requirements, can use this mode. The amplification gain
attenuation range 0-15dB.
(Not recommend).

3.4.7 SBS Suppression Adjustment

SBS value is very important in 1550nm long-distance transmission system. Stable
continuous coherent light source, add +6 dBm optical power in the standard single
mode fiber may occur SBS phenomenon. Ultrahigh SBS threshold will reduce CNR
and CSO low-frequency indicators.
High SBS threshold will also influence self phase modulation (SPM) and reduce
high-frequency CSO indicator.
When meet the conditions, as far as possible to use a low threshold SBS.
WT-1550-EM10 1550nm external modulated optical transmitter operating manual
HIGH（LOW）
HIGH（LOW）
HIGH
HIGH（LOW）
HIGH（LOW）
HIGH（LOW）
HIGH（LOW）
HIGH（LOW）
HIGH（LOW）
OFF
LEFT（RIGHT ） The left (right) power is invalid
Comment
The RF input signal is high (low)
The laser bias current is high (low)
The laser cooling current is high
The output optical power is high (low)
The -5V voltage is high (low)
The +5V voltage is high (low)
The +12V voltage is high (low)
The -12V voltage is high (low)
The +24V voltage is high (low)
The laser is off
The CSO initialization is failed
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