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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) |
||
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 |
||
CNR2: 16dBm EDFA ( NF4.5~5.5dB ) , 65km fiber, 0dBm receiving.
Ordering information
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