Externally Modulated CATV 1550nm Optical Transmitter
1. Characteristic:
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 47~1080MHz.
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.
2. Summary:
When ST15xx fiber optical transmitter is applied in the multi-channel transmission, the laser's chirp effect will react
With the link dispersion of the fiber. There will be distortion on the receiver. If working with the EDFA, there will be
Serious CSO deterioration. The distortion and deterioration will increase with the longer distance and more channels.
1550nm internal modulation CATV optic transmitter, has the chirp and dispersion compensation inside, and improves
The system index greatly. It can be used in the town where the fund is shortage and the distance is less than 10Km as a transition solution.
3. Test Condition:
Test link path is formed of standard fiber and standard optical receiver. Under the condition of prescriptive link loss,
Laser transmitter modulation depth of each channel being 3.6%, set 59 PAL-D simulative TV channels signal at 47~550MHz
And 33 QAM64 digital modulated signal at the range of 550~750(862) MHz, output level of digital modulated signal is lower 6dB than of simulative signal carrier wave.
Principle Drawing
5Order Direction
*Model nomination explanation please reference 1310nm laser transmitter equipment model nomination explanation.
6Accessories
| Performance |
Index |
Supplement |
| Optic feature |
Laser wavelength |
nm |
1550±10 |
|
| Linearity width |
MHz |
≤1 |
λ |
| Equivalent noise intensity |
dB/Hz |
≤-160 |
RIN 20~1000MHz |
| Side mode suppression ratio |
dB |
≥35 |
SMSR |
| Extinction ratio |
dB |
≥20 |
Xp |
| Output power |
dBm |
2× |
2×7, 2×9, 2×10, 2×5, 4×7,6×7 |
| SBS restrain |
dBm |
≥17 |
|
| Return loss |
dB |
≥60 |
|
| Optic fiber connector |
|
FC/APC |
SC/APC or E-2000 |
| RF feature |
Work bandwidth |
MHz |
45-862 |
|
| Input level |
dBmV |
18~28 |
AGC |
| Flatness |
dB |
≤±0.75 |
45~862MHz |
| Return loss |
dB |
>16 |
45~750MHz |
| Input impedance |
Ω |
75 |
|
| Link feature |
Transmit channel |
|
PAL-D/60ch |
|
| CNR |
dB |
≥51 |
10Km optic fiber,0dBm receive |
| CTB |
dB |
≤-65 |
|
| CSO |
dB |
≤-60 |
|
| |
| General feature |
Network interface port |
|
RJ45,R232 |
Support I.E. & SNMP |
| Power supply |
V |
90~265 city power |
-48VDC optional |
| Power Consume |
W |
≤50 |
Single power works |
| Work temp. |
°C |
-5~65 |
Machine temp controlled automatically |
| Storage temp. |
°C |
-40~85 |
|
| Work relative temp. |
% |
5~95 |
|
| Size |
" |
19×10×1.75 |
WxDxH |
FAQ
1. What are the payment terms that you support?
Usually, we accept T/T, PayPal, Western Union and so on. You can select the termsof payment which is more convenient for you.
2. What about the lead time?
Usually, if there's stock, we ship the goods within 3-5 working days after the deposit is confirmed. lf it is out of stock. the lead time depends.
3.How about the shipping?
When the package is small, we normally choose FedEx, DHL, TNT, and UPS and so on, while the goods have high weight and volume, we suggest using air or sea shipment.
4. How can I place an order?
(1) Negotiation is agreed upon for the product price and specifications.
(2) The Proforma invoice will be sent for confirmation.
(3)After the agreement on the proforma invoice, the customer makes the deposit
(4) Manufacturing will be started as soon as the payment is confirmed by our bank
(5) Ship out the goods within the agreed delivery deadline.
5.Can you do OEM for us?
Yes. If there is a certain order quantity, we can do OEM including printing, logo, and customized model for you.
6.How about the Warranty?
There are 12 months for the warranty. While the warranty is not responsible for those broken by violence or updated with other brands.
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