Unique electric-control optical attenuation function guarantees optical difference of spot system can be automatically controlled as it is set by automatically controlling spot optical signal based on broadcast signal value after setting optical difference of spot system. This function can realize automatic adjustment in the whole course of spot system. So this design is humanized and easy to operate.
Meanwhile, special AGC circuit with electric-control attenuator as core can realize automatic control of modulation and flexible control of drive level value. And it can guarantee stability of electrical level after system debugging, and greatly simplify project debugging.
• Optimized integrated design of pre-distortion, amplifier and laser
• Integrated electrical control of Overlay spot function, can be spot debugging set by LDC or NM control
• Innovative operation function of AGC and MGC, working separately at the same time, make the product easy to use and improves the applicability of the system.
• AGC has a function which can be set to “ON” or “OFF”.
• Spot machine with Overlay has the function of automatic shutting down spot when main line power is low.
• New-type and stable laser bias and temperature control
• ITU wavelength DFB laser
• Bandwidth can be up to 1GHz
• By adopting low-consumption design, complete machine power consumption less than 10W, reliability of equipment is greatly increased.
• Double-power, hot-plug, balance load operation, light power load, seamless switching when it fails, greatly increase life time.
• By equipped SNMP network management function, it has the function of remote network management and local monitoring.
• LCD operation status: optical power, bias current, laser temperature, refrigeration current and spot setting status, etc.
|Optical Performance Index||Unit||Index||Remark|
|Optical Wavelength Range||nm||1550±20 or ITU wavelength|
|DFB Laser Output Optical Power||mW||10|
|Optical Return Loss||dB||≥55|
|Laser DFB RIN||dB/Hz||RIN≤-155|
|Main Broadcasting Input Optical Power||dBm||0~+16||DWDM Multiplexer|
|Main & Side Optical Power Difference Setting Range||dB||0 ~ 8|
|Main Input Low-limit Setting Range||dB||+5 ~ -5||Shut down laser when main is lower than this value|
|Electrical Performance Index|
|Modulation Mode||–||AM ~ VSB|
|Frequency Range||MHz||47 ~ 1000|
|Flatness of Frequency Response||dB||0.75|
|RF Drive Level||dBµV||75~85|
|MGC Modulation Level||dB||7.0|
|MGC Modulation Step Length||dB||0.1|
|Input Return Loss||dB||≥16|
|Broadcasting Digital Index2|
|Spot Analog Transmission3|
|Spot Digital Transmission4|
|Voltage||V||AC90V~264V/50Hz||AC 220V Supply|
|DC -36~ -75V||DC -48V Supply|
|Operating Temperature||º C||-10~+55|
|Storage Temperature||º C||-20~+85|
|Operating Humidity||–||0~90% No Condensation|
|Storage Humidity||–||0~95% No Condensation|
- 59 PAL-D (47~550MHz) analog carrier transmitter, OMI=3%, 10KM fiber, 1-10 km test, 0dBm receive
- 59 QAM (47~550MHz) analog carrier transmitter, OMI=3%, 10KM fiber, 1-10 km test, 0dBm receive
- Target on broadband overlay , 8 PAL-D(47~550MHz) analog carriers load transmitter, OMI=12%( same as broadcast OMI is 3%, Overlay power is 6dB lower than broadcast), 10KM fiber, -6dBm receive
- Target on broadband overlay, 32 QAM( 550~1000MHz) digital carriers load transmitter, OMI=12% ( Broadcast keeps 6 analog, the digital channels OMI is 3% , overlay power is 6dB lower than broadcast), 10KM fiber, -6dBm receive, target on narrowband overlay, 16 QAM(550~1000MHz) can be loaded.
|Product Name||Product Model||Descriptions|
|1550nm Directly Modulated Optical Transmitter||CT3155B-10-W0-34-SA-0-3-01||SNMP network management, 1550nm optical wavelength range , Optical power 10mW, Broadcast mode, SC/APC interface, double powers 220V/AC, suitable for 25 km range transmission|