product description：
GSDT-FTX optical transmitter module is designed for current and future applications of the HFC and FTTH designed 1310nm straight dimming transmitter. The transmitter uses a high-performance cooled 1310nm DFB light source, the use of advanced predistortion circuit, the system has a good CTB and CSO characteristics, its embedded microcontroller processing circuitry to monitor and control all the parameters status and remote communication, can be accessed via the front panel the LED or EMS device management module to obtain these parameters.
Features:
Cooled DFB laser
Hot-swap capability
RF bandwidth 47-1003MHz
Broadband / narrowband input
Output power 2/4/6/8/10/13/16 / 20mW
Automatic / manual gain control (AGC / MGC)
RF input test point
Short circuit protection
Technical Parameters：
|
project
|
unit
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Performance parameters
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Remark
|
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The output light wavelength
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nm
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1310 +/-20
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|
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Output optical power
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dBm
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3-14
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|
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Connector Type
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--
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FC/APC或SC/APC
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|
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RF bandwidth
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MHz
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47-1003
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|
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Return Loss
|
-dB
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≥16
|
|
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Input Level
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dBuV
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75+/-4
87+/-4
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Broadband
Narrowband
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|
flatness
|
dB
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+/-0.75
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|
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Test Points
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dB
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-20+/-1-32+/-1
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Broadband
Narrowband
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|
CSO
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dBc
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≥ 63
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15km Fiber + attenuator, received optical power -1dBm (77 NTSC channel)
|
|
CTB
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dBc
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≥ 67
|
|
XMOD
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dBc
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≥ 65
|
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Power
|
W
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<12.5
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|
Ordering Guide：
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GSDT-FTX
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-00
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0
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|
GSD 1310nm straight dimming module type hair
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-3 ~ 14: 3 ~ 14 dBm output
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FC：FC/APC
SC：SC/APC
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Alarm description：
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Display information
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Alarm status
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System response
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|
001
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Low output power
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STA LED red
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|
002
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High output power
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STA LED red
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|
003
|
Laser bias current is high
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STA LED red
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|
004
|
Laser temperature high
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STA LED red
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|
005
|
RF signal level is low
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STA LED red
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|
006
|
High temperature transmitter
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STA LED red
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|
007
|
TEC current high
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STA LED red
|
|
008
|
RF signal level is high
|
STA LED red
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Common Fault Analysis：
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malfunction
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Repair Instructions
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|
RF signal level is low
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1. Check the input RF signal level is greater than 9 dBmV / channel (77 NTSC channel standards)
2. If the input level is normal, please contact the manufacturer for repair
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|
No output optical power
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1. Clean the fiber connector
2. Check whether the laser is turned on
3. Use the power meter to measure the output optical power
4. If still no optical power output, contact the manufacturer for repair
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|
Output optical power is below specification
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1. Ensure that all of the fiber end face cleaning
2. Check whether the optical fiber connector types to match
3. Use the power meter to measure the output optical power
The optical power output is still low, contact the manufacturer for repair
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