Optical Transport for L-BAND signals Between 900 and 2100MHz
L-band Fibre optic Transmitter converts electrical RF L-band signal 900Mhz to 2100 MHz to optical modulated signal. L-band Fibre optic receiver converts optical signal to RF electrical. Equipment sends optical L-band signal from satellite antenna to the receiver for a long distance up to 120Km. CL-Lband Transmitter could power LNB over RF “F” connector so the external LNB power source could be eliminated .
By using CWDM technology it allows to send up to 8 separate L-Bands signals over single fiber
For multiple dwelling units (MDUs) environment, fiber optic technology promises more reliable wide band features as well as very low signal attenuation (< 0.4dB/km) through a long distant transmission or a wide area signal. Distribution constantly enhances the performance of a multi-user direct broadcast satellite (DBS) L-Band transmission.
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Features
- Optical Solution for MDU
- 950 ~ 2050 MHz Bandwidth
- > OdB system gain (including 13dB optical link budget)
- Optional automatic gain control (AGC) in transmitter
- Supply+12 / 13 or + 18V DC to LNB
Example Aplication
Model Selection
CL-Lband-TX
L-band 900-2100Mhz fiber optic transmitter
CL-Lband-RX
L-band 900-2100Mhz fiber optic treceiver
CL-Lband-TX-1550
1550nm L-band 900-2100Mhz fiber optic transmitter
CL-Lband-TX-CWDM
CWDM L-band 900-2100Mhz fiber optic transmitter
CL-Lband-TX-DWDM
DWDM L-band 900-2100Mhz fiber optic transmitter
Specifications
Standards
L-band Transmitter specification
Wavelength - 1310nm or 1550nm or CWDM
Optical output power - 0dbm or +5dbm
Connector - SC/APC or any different by request
Return loss - less than 55dB
Operating bandwidth - 47 to 2600 MHz
Nominal composite RF input - 30dBm
Input impedance - 75Ohm
AGC range (optional) 25dB
RF Flatness +- 2dB
RF return loss - 12dB
RF connector -F type
Power requirements +9 - +18V DC
Power to LNB (optional) - 18VDC or 13VDC or 12V DC
Operating Temperature - -20 to +60degree C
Dimensions - 77D x145Wx 28H (mm)
Weight - 325 g
L-band Transmitter specification
Wavelength - 1310nm or 1550nm or CWDM
Optical input – up to -13Bbm
Connector - SC/APC or any different by request
Return loss - less than 55dB
Operating bandwidth - 47 to 2600 MHz
Nominal composite RF output - 30dBm @13 db optical link budget
Input impedance - 75 Ohm
RF Flatness +- 2dB
RF return loss - 12dB
RF connector -F type
Power requirements +9 - +18V DC
Operating Temperature - -20 to +60degree C
Dimensions - 77D x145Wx 28H (mm)
Weight - 325 g
System performance
Link Gain - better than 26 dB (Note 1)
IMD3 less than - 60dBc (Note 2)
CNR (BW= 27 MHz) better then 22db (Note 3)
Notes :
1) Measured at – 30 dBm/ch RF power and the transmitter output power is received directly
2) Test Conditions : 2 uncounted carriers (f1=1000Mhz , f2=110 MHz) ,RF power = -30dBm per carrier
3) Measured at - 40 dBm/ch RF power and -13 dBm optical received power (27 MHz bandwidth is assumed).
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