In accordance with the planning of the Next Generation Broadcasting Network (NGB) and various PON standards, 1550nm is defined as the transmission wavelength for HFC downstream. The high cost of 1550nm external modulated transmitter and dispersion effects of 1550nm directly modulated transmitter make network transformation difficult. Thus we create the 1550nm directly modulated optical transmitter with electronically controlled dispersion compensation. It supports up to 1.2GHz band and DOCSIS 3.1 system. Two RF inputs, high isolation, QAM and IPQAM available. Support a transmission distance of 50KM with electronically controlled dispersion compensation. Built-in CWDM is optional for multi-wavelength networking.
● Support hot swap
● 1.2GHZ band, support DOCSIS 3.1 system
● Two RF inputs with high isolation
● High-quality RF insertion capability
● Optional CWDM for external optical input
● Electronically controlled dispersion compensation, support a transmission distance of 50KM
● Low cost solution and external modulation capable
● Optional ITU standard wavelength
|
Item |
Unit |
Parameter |
|
|
Optical part |
|||
|
Optical wavelength |
nm |
ITU wavelength |
|
|
Laser type |
|
Butterfly-typed DFB laser |
|
|
Optical modulation mode |
|
Direct optical intensity modulation |
|
|
|
FC/APC or SC/APC |
||
|
Output optical power |
mW |
10 |
The insertion loss of the VOA and CWDM is excluded. |
|
Laser signal input (main channel) |
dBm |
-5～10 |
|
|
RF part |
|||
|
Frequency range |
MHz |
47～870/1003/1218 |
|
|
RF input level |
dBuV |
77± 5 |
|
|
Flatness in band |
dB |
± 0.75 |
|
|
Input return loss |
dB |
≥ 16 |
|
|
RF AGC control range |
dB |
±5 |
|
|
RF MGC adjustable range |
dB |
0～20 |
|
|
RF input isolation |
dB |
≥ 50 |
Isolation between two RF inputs |
|
RF input test port |
dB |
-20±1 |
|
|
Laser drive level test port |
dB |
-20±1 |
|
|
Electronically controlled optical attenuator tolerance |
dB |
≤1: ATT 0-15dB |
|
|
≤3: ATT 16-20dB |
|||
|
CNR |
dB |
≥ 48 |
550MHZ 59CH analog signal 77dBuV/CH 550-870MHZ 40CH digital signal 67dBuV/CH 25 Km, -1dBm input |
|
C/CSO |
dB |
≥ 58 |
|
|
C/CTB |
dB |
≥ 63 |
|
|
CNR |
dB |
≥ 46 |
550MHZ 59CH analog signal 77dBuV/CH 550-870MHZ 40CH digital signal 67dBuV/CH 50Km, -1dBm input |
|
C/CSO |
dB |
≥ 55 |
|
|
C/CTB |
dB |
≥ 63 |
|
|
MER |
dB |
≥ 40 |
25 Km, -1dBm input, 96CH digital 77dBuV/CH |
|
≥ 39 |
50 Km, -1dBm input, 96CH digital 77dBuV/CH |
||
|
Others |
|||
|
Maximum power consumption |
W |
≤10 |
|
|
Operating temperature |
℃ |
-5 ～ + 55 |
|
|
Storage temperature |
℃ |
-30 ～ + 70 |
|
|
Weight |
Kg |
1 |
|