Taiwan Quality Remote Support

CATV & ITU wavelength 1550 nm Optical Transmitter

Features


  •  Operating bandwidth is up to 47~862MHz ( Optional 47~1080MHz )

  •  AGC/MGC mode is optional at spot

  •  1550nm Externally Modulated Optical Transmitter

  •  RoHS Compliant and Lead-Free

  •  High performance: Externally modulated technology

  •  1+1 power backup, support hot plug-ing


SPOTLIGHT

1550 nm externally modulated optical transmitter is the core equipment in the RFTV network system. Adopting EPON GEPON or P2P access mode for triple play!

Applications



  • Used in main links and distribution network links in large and middle CATV station head-end.

  • Analog digital hybrid transmission >200Km (with dispersion compensation).

  • Pure digital transmission (without dispersion compensation) >400Km, (with dispersion compensation) >700Km.

  • ITU wavelength adjustable, applicable to the value-added service of DWDM fiber optic CATV system and CFG dispersion compensation system.

  • It can be used in branch FTTH that has high system index demand.

  • Point to Point>65Km, CSO ≤ -65dB.

  • It can provide high qualified and reliable value-added service such as RFTV, IPTV and VOD for the secondary users.

  • It can also avoid the limitation of CSO deterioration and transmission distance caused by laser chirp for adopting 1550nm direct modulated optical transmitter.


CATV optical transmitter

Description
1550nm externally modulated optical transmitter is the core equipment in the RFTV network system.RFTV is a unidirectional analogue and digital video broadcast. It adopts high efficiency modulation mode for RF carrier wave and its economy , flexibility and bandwidth validity is beyond comparison of IPTV. By adopting EPON, GEPON or P2P access mode to realize triple-play and FTTx, RFTV broadcasting network in 1550nm optical wavelength still plays an important role.

1550nm externally modulated technology for optical transmitter has no laser chirp, low dispersion distortion, and large extinction ratio, with excellent characteristic within 40~862MHz. External Modulator doesn't generate CSO distortion after reasonable bias. It can be followed by amplifier when used in large area coverage of over-long trunk and local networks. Adopting WDM, multi-wavelength optical channels can be transmitted through one fiber. 1550nm optical fiber CATV follows the current development trend of triple-play and fiber to home.

Fiberbitt's CATV optical transmitters that accords with current international industry technique standard is a 1550nm Externally Modulated Optical Transmitter. The whole unit light source adopts narrow bandwidth ( 0.65MHz ), low noise, continuous wave DFB laser, which is propitious to reduce the influence of dispersion. The whole unit signal modulation adopts CATV special LiNbO3 external modulator of American company and Fiberbit optimized control technology with independent intellectual property , so it can reach high index of back to back CNR ≥ 54dB, CTB ≤ -65dB, CSO ≤ -65dB, SBS: 13~18dBm adjustable . The whole unit is equipped with perfect RS232 communication interface, SNMP network management, 1+1 back-up power supply , hot-plug function available, chassis temperature auto-control.
Detailed Features

  • High performance: Externally modulated technology, no laser chirp, low dispersion distortion, high extinction ratio, with excellent characteristic within 40~862MHz.

  • 1+1 powers supply back , up hot-plug function available.

  • Narrow bandwidth (0.65MHz), lower noise, DFB continuous wave laser, is propitious to reduce the influence of the dispersion.

  • The operating bandwidth is up to 47~862MHz ( Optional 47~1080MHz ).

  • CNR ≥ 53dB and excellent CTB, CSO index.

  • SBS: 13~18dBm adjustable.

  • ITU standard wavelength, ±200GHz (±1.6nm) adjustable.

  • AGC/MGC mode is optional at spot. OMI can be optimized at spot.

  • Perfect RS232 communication interface.

  • Advanced SNMP network management function.

  • Casing temperature auto-control.

  • Excellent P/P ratio.

Specifications


























































































































































































































Performance

Index

Supplement

Optic feature
Operating wavelength
(nm)

1548~1563

HT8500HC

ITU-TG.692

HT8500HU
Wavelength ADJ. range
(nm)

±1.6 ( ±200GHz )

HT8500HU
Wavelength ADJ. mode
±0.05nm stepping

HT8500HU
Wavelength stability
(Pm/℃)

-1~0

Tc=20~70℃
Linewidth
(MHz)

Typ.=0.65

FWHM( △λ ) ( -3dB fullwidth )
Side mode suppression ratio
(dB)

≥45

SMSR
Equivalent noise intensity
(dB/Hz)

≤-160

RIN ( 20~1000MHz )
Number of output port
2
Output power of each port
(dBm)

10、8.5、7.0、4.5


2×7, 2×9, 2×10, 2×5, 4×7,6×7

Return loss
(dB)

≥50
optical fiber connector
SC / APC

Optional LC / APC,FC / APC

RF feature
Work bandwidth
(MHz)

47-862
Input level
(dBmV)

18~28

AGC
Flatness
(dB)

≤±0.75

47~862MHz
Return loss
(dB)

>16
Input impedance
(Ω)

75
RF port
F-Female

Link feature
Transmit channel
PAL-D / 60CH

PAL-D / 99CH
CNR1
(dB)

≥53.0

≥51.5

Back to back
CNR2
(dB)

≥51.5

≥49.5

65Km optical fiber, 0dBm receive
CTB
(dB)

≤-65

≤-65
CSO
(dB)

≤-65

≤-65
SBS restrain
(dBm)

13~18

Adjustable

General feature
SNMP network management interface
RJ45
Communication interface
RS232
Power supply
(VAC)

90~265

50 / 60Hz

(VDC)

-48

30~72
Power Consume
(W)

≤50

Single power works
Work temp.
(℃)

-5~65

Machine temp. control automatically
Storage temp.
(℃)

-40~85
Operating relative humidity
(%)

5~95
Size (W)x(D)x(H)
19×15.2×1.75 ( " )
483×386×44 ( mm )

S-Type


19×17.9×1.75 ( " )
483×455×44 ( mm )




L-Type
Ordering Information
FB-CT-1550-4.5 1550 nm externally modulated optical transmitter, 1548~1563 nm, output power ≥4.5 dbm
FB-CT-1550-7 1550 nm externally modulated optical transmitter, 1548~1563 nm, output power ≥7.0 dbm
FB-CT-1550-8.5 1550 nm externally modulated optical transmitter, 1548~1563 nm, output power ≥8.5 dbm
FB-CT-1550-10 1550 nm externally modulated optical transmitter, 1548~1563 nm, output power ≥10 dbm
FB-CT-ITU-1550-4.5 1550 nm externally modulated optical transmitter, 1528~1563 nm ITU wavelength ADJ, output power ≥4.5 dbm
FB-CT-ITU-1550-7 1550 nm externally modulated optical transmitter, 1528~1563 nm ITU wavelength ADJ, output power ≥7 dbm
FB-CT-ITU-1550-8.5 1550 nm externally modulated optical transmitter, 1528~1563 nm ITU wavelength ADJ, output power ≥8.5 dbm
FB-CT-ITU-1550-10 1550 nm externally modulated optical transmitter, 1528~1563 nm ITU wavelength ADJ, output power ≥10 dbm
Accessories
Share

SELF STUDY BLOG

Modern networks rarely rely on pure topologies like bus, ring, or star. Most common solutions use hybrid topologies, which are combinations of features from those three.   Star-Wired Ring As it is clear from the name, star-wired ring topology has features of star and ring topologies. You can see example of this topology ...