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IT8500T ( CNR≥54dB, SBS:13~19 adjustable)
Top-class ITU wavelength adjustable Externally Modulated Optic transmitter
Description
The External
modulation technology, with the laser working in direct current, has the
advantages of no laser chirp, low dispersion distortion, large extinction
ratio, and high speed. It also has the disadvantages of high cost and high
difficulty in manufacturing.
Direct modulation will lead to high laser chirp (Laser's bias current is
modulated by signal and the optical spectrum shifts and shakes). Laser chip
will interact with dispersion effect caused by standard single mode fiber
(SMF-28), which will generate serious distortion in the place of 1550nm. This
kind of distortion will become more serious with the increase of transmission
distance, bandwidth and channel number.
At present, international high performance 1550nm direct modulation has no
obvious performance inferior while transmitting an analog and digital
multiplexing full channel signal with transmission distance≤15Km or transmitting digital load with
transmission distance≤40Km.
Idealphotonics IT1500A is a 1550nm direct modulation optical transmitter with
high index and AGC function. It adopts high linearity and low chirp DFB laser,
built-in pre-distortion compensation and AGC, APC, ATC closed loop control,
which improves the system index obviously. IT1500A direct modulated optical
transmitter can be used in FTTx (≤10Km)
of second-grade service area (Sub-HE), also can be used in WDM narrow-band
multiplexing and IP/QAM.
IT1500AC optical transmitter: CATV wavelength.
IT1500AU optical transmitter: ITU standard wavelength.
Feathure
Low chirp, high linearity DFB laser, chirp
compensation.
Dual module RF driver , high efficient
laser pre-distortion adjustment.
Full-automatic OMI control, AGC &
MGC.
Intuitionistic modulation status display.
Built-in dual back-up power supply,
switch automatically .
Casing temperature auto-control, ensure
the long life of the laser.
Application
Provide IPTV, VOD
value-added service in second-grade service area (Sub-HE).Analog digital mixed
transmit <15Km
(common distance ≤ 10km). Pure digital load <40Km.
WDM narrow band multiplex >70Km.
Specifications
|
Performance |
Index |
Supplement |
||
|
Optic feature |
Wavelength |
(nm) |
1548~1563 |
IT1500AC: CATV wavelength |
|
1530~1563 |
IT1500AU: ITU standard wavelength |
|||
|
Linewidth |
(MHz) |
≤1 |
FWHM(△λ) |
|
|
Side mode suppression ratio |
(dB) |
≥45 |
SMSR |
|
|
Extinction ratio |
(dB) |
≥20 |
XP |
|
|
Equivalent noise intensity |
(dB/Hz) |
≤-160 |
RIN (20~1000MHz) |
|
|
Output power |
(dBm) |
6 |
3, 10 Options |
|
|
Return loss |
(dB) |
≥55 |
|
|
|
optical fiber connector |
|
FC/APC |
Optional SC/APC |
|
|
RF feature |
Work bandwidth |
(MHz) |
45-862 |
|
|
Input level |
(dBmV) |
20±2 |
MGC |
|
|
Flatness |
(dB) |
≤±0.75 |
45~862MHz |
|
|
Return loss |
(dB) |
>16 |
|
|
|
Input impedance |
(Ω) |
75 |
RF/INPUT |
|
|
RF test |
(dB) |
0±1 |
|
|
|
Link feature |
Transmit channel |
|
PAL-D/60CH |
NTSC/80CH |
|
CNR |
(dB) |
≥50 |
-1dBm receive |
|
|
CTB |
(dB) |
≤-63 |
|
|
|
CSO |
(dB) |
≤-57 |
|
|
|
SBS restrain |
(dBm) |
≥17 |
|
|
|
General feature |
Network management interface |
|
RJ45, RS232 |
Support I.E. & SNMP |
|
Power supply |
(V) |
90~265city power |
-48VDC optional |
|
|
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) |
|
19×10×1.75 ( "
)
483×254×44 ( mm )
|
|
|
a. 47~550MHz, PAL-D/59CH.
b. -1dBm input receiver
Product sereis
|
Model |
Distance(Km) |
Output power(dBm) |
CNR(dB) |
CTB(dB) |
CSO(dB) |
SBS(dBm) |
|
IT1503A-05 |
5 |
3 |
50 |
-63 |
-57 |
17 |
|
IT1506A-05 |
6 |
50 |
-63 |
-57 |
17 |
|
|
IT1510A-05 |
10 |
50 |
-63 |
-57 |
17 |
|
|
IT1503A-10 |
10 |
3 |
50 |
-63 |
-57 |
17 |
|
IT1506A-10 |
6 |
50 |
-63 |
-57 |
17 |
|
|
IT1510A-10 |
10 |
50 |
-63 |
-57 |
17 |
|
|
IT1503A-15 |
15 |
3 |
50 |
-63 |
-57 |
17 |
|
IT1506A-15 |
6 |
50 |
-63 |
-57 |
17 |
|
|
IT1510A-15 |
10 |
50 |
-63 |
-57 |
17 |
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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