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IT8500T ( CNR≥54dB, SBS:13~19 adjustable)
Category: Optical Transmitte  Publish Time: 2014-07-07 18:35 

IT8500T ( CNR≥54dB, SBS:13~19 adjustable)
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IT8500T ( CNR≥54dB, SBS:13~19 adjustable)
Top-class ITU wavelength adjustable Externally Modulated Optic transmitter

Description
RFTV is a unidirectional analogue and digital video broadcast. It adopts high efficiency modulation mode for RF carrier wave and its economical efficiency, 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 and 1550nm externally modulated optic transmitter is the core equipment in this system.
1550nm externally modulated optic transmitter technology has no laser chirp, low dispersion distortion, and great extinction rate, with excellent characteristic within 40~862MHz. External Modulator doesn't generate CSO distortion after reasonable bias. It can be connected by amplifiers when applied in large area coverage of over-long trunk and local networks. Adopting WDM, it can multiplex optical channels with multi-wavelength through one fiber. 1550nm optic transmitter CATV follows the current development trend of triple-play and fiber to home.
Idealphotonics is the well-known manufacture in analog externally modulated optic transmitter around the world. IT8500T is a series of 1550nm externally modulated optic transmitter achieving the highest standards of today. The whole-unit's optical source adopts narrow line width (Typ.=0.3MHz), low noise and continuous wave DFB laser, which is propitious to reduce dispersion effect. Adopting ITU standard wavelength, users can adjust and set the wavelength on the front panel within the range of ±200GHz (±1.6nm) as ±0.05nm stepping. IT8500T EM optic transmitter is applicable for the network upgrading and expansion of WDM system. Thewhole unit signal modulation adopts CATV special LiNbO3 external modulator of American JDS-U company and Huatai optimized control technology with independent intellectual property , so IT8500T EM optic transmitter can reach high index of back to back CNR ≥ 54dB, CTB ≤ -65dB, CSO ≤ -65dB, SBS: 13~19dBm continuous 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. All the opticalportofEMoptic transmitter can be installed in the front panel (The back panel is also available if needed).
Idealphotonics IT8500T, top type externally modulated optic transmitter with it's high index, high reliability and excellent cost performance, is applicable for the over-long trunk of large and middle CATV station head-end, WDM system and CFG dispersion compensation system.
Feathure
Externally modulated technology for IT8500T optic transmitter, no laser chirp, low dispersion distortion, high extinction ratio, with excellent characteristic within 40~862MHz, used in the over-long trunk of large and medium sized cable television head-end.
1+1 powers supply back , up hot-plug function available.
Narrow line width (Typ=0.3 MHz), low noise, and DFB continuous wave laser, be propitious to reduce dispersion effect.
The work bandwidth for IT8500T optic transmitter is up to 47~862MHz.
CNR ≥ 54dB and excellent CTB, CSO index.
SBS: 13~19dBm, continuous adjustable.
ITU standard wavelength adjustable , users can adjust and set the wavelength on the front panel with ±0.05nm stepping in the range of ±200GHz (±1.6nm), used in the network upgrading and expansion of WDM system.
AGC/MGC mode is optional at spot; OMI can be optimized at spot.
Perfect RS232 communicate interface.
Advanced SNMP network management function.Casing temperature auto-control.
Application
Used in the over-long trunk and distribution net in the large and middle cable televisioncentral station head-end.
Analogue digital hybrid transmission > 200Km(with dispersion compensation).
Pure digital transmission (Without dispersion compensation) > 400Km, (With dispersion compensation) >700Km.
VAS in DWDM fiber CATV system
CFG dispersion compensates system.
Specifications

Performance

Index

Supplement

Optic feature

Operating wavelength

(nm)

ITU-TG.692 standard wavelength

 

Wavelength ADJ. range

(nm)

±1.6

±200GHz

Wavelength ADJ. mode

 

±0.05nm stepping

 

Wavelength stability

(Pm/℃)

-1~0

Tc=20~70℃

Linewidth

(MHz)

Typ.=0.35

FWHM(△λ ), ( -3dB full width )

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)

7.0, 8.5, 10, 12, 13

2×7, 2×9, 2×10, 2×12, 2×13, 

Return loss

(dB)

≥50

 

Optical fiber connector

 

SC / APC

Optional FC / APC, LC / 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 connector

 

F-Female

 

Link feature

Transmit channel

 

PAL-D / 60CH

PAL-D / 99CH

 

CNR1

(dB)

≥54.0

≥52.5

Back to back

CNR2

(dB)

≥52.5

≥50.5

65Km optical fiber, 0dBm receive

CTB

(dB)

≤-65

≤-65

 

CSO

(dB)

≤-65

≤-65

 

SBS restrain

(dBm)

13~19

Adjustable

General feature

SNMP network management interface

 

RJ45

 

Communication interface

 

RS232

 

Power supply

(VAC)

90~265VAC

50/60Hz

(VDC)

-48

30~72

Power Consume

(W)

≤50

Single power works

Operating temp.

(℃)

-5~65

Machine temp. control automatically

Storage temp.

(℃)

-40~85

 

Operating relative humidity

(%)

5~95

 

Size

 


19×15.2×1.75 ( " )  483×386×44 ( mm )


 (W)x(D)x(H)

Test condition:
CNR1: Tx to Rx, 0dBmReceiving.
CNR2: 16dBm EDFA (NF4.5~5.5dB), 65kmfiber, 0dBm receiving
Product sereis

Model

Number of output port


Output power of each port


Operating wavelength(nm)

SBS Restrain(dBm)

System index ( 59 routes PAL-D )

CNR1

CNR2

CTB

CSO

IT8527T

2

≥7.0


ITU wavelength
±200GHz
ajdustable



13~19
Adjustable


≥54

≥52.5

≤-65

≤-65

IT8529T

2

≥8.5

≥54

≥52.5

≤-65

≤-65

IT85210T

2

≥ 10

≥54

≥52.5

≤-65

≤-65

IT85212T

2

≥12

≥54

≥52.5

≤-65

≤-65

IT85213T

2

≥13

≥54

≥52.5

≤-65

≤-65

Test condition: CNR1: Tx to Rx, 0dBm receiving.
CNR2: 16dBm EDFA  ( NF4.5~5.5dB ) , 65km fiber, 0dBm receiving.
Ordering information

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