Complaint
GT is the well-known manufacture in analog externally modulated optical transmitter in the world. Huatai HT8500H 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 Huatai 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, 16, 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.
HT8500H, standard type externally modulated optical transmitter with it's high index, high reliability and excellent cost performance, is applicable for main links and distribution network links in large and middle CATV station head-end.
HT8500HU: ITU standard wavelength adjustable. User can adjust and set the laser wavelength within ±200GHz(±1.6nm)at ±0.05nm space by LCD menu or buttons on the front panel. Apply to WDM network upgrade and expansion.
1. High performance: Externally modulated technology, no laser chirp, low dispersion distortion, high extinction ratio, with excellent characteristic within 47~862MHz.
2. 1+1 powers supply back , up hot-plug function available.
3. Narrow bandwidth (0.65MHz), lower noise, DFB continuous wave laser, is propitious to reduce the influence of the dispersion.
4. The operating bandwidth is up to 47~1000MHz .
5. CNR ≥ 53dB and excellent CTB, CSO index.
6. SBS: 13, 16, 18dBm adjustable.
7. ITU standard wavelength, ±200GHz (±1.6nm) adjustable.
8. AGC/MGC mode is optional at spot. OMI can be optimized at spot.
9. Perfect RS232 communication interface.
10. Advanced SNMP network management function.
11. Casing temperature auto-control.
12. Excellent P/P ratio.
1. 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.
2. HT8500HU ITU wavelength adjustable, applicable to the value-added service of DWDM fiber optic CATV system and CFG dispersion compensation system.
3. 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.
| Performance | Index | Supplement | |||
Optical 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/ºC) | -1~0 | Tc=20~70ºC | ||
| 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) | 13, 12, 11, 10, 8.5, 7.0, 4.5 | 2×5,2×7, 2×9, 2×10, 2×11 , 2×12 , 2×13 | ||
| Return loss | (dB) | ≥50 | |||
| Optical fiber connector | SC / APC | Optional LC / APC,FC / APC | |||
| RF feature | Work bandwidth | (MHz) | 47-862 | Optional 47~ 1000MHz | |
| Input level | (dBmV) | 18~28 | AGC | ||
| Flatness | (dB) | ≤±0.75 | 47~862MHz | ||
| ≤±1.5 | 862~1000MHz ( Optional ) | ||||
| 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, 16, 18 | Adjustable | ||
| General feature | SNMP network management interface | RJ45 | |||
| Communication interface | RS232 | ||||
| Power supply | (VAC) | 90~265 | 50 / 60 Hz | ||
| (VDC) | -48 | 30~72 | |||
| Power Consume | (W) | ≤50 | Single power works | ||
| Work temp. | (ºC) | -5~65 | Machine temp. control automatically | ||
| Storage temp. | (ºC) | -40~85 | |||
| Relative humidity | (%) | 5~95 | |||
| Size (W)x(D)x(H) | 19×15.2×1.75 | S-Type | |||
| 19×17.9×1.75 | L-Type | ||||
1. What are the payment terms of payment?
Usually, we accept T/T, PayPal, Western Union, and Alibaba Trade Assurance. You can select the terms of payment which is more convenient for you.
2. What about the lead time?
Usually, if there's stock, we ship the goods within 5-7 working days after the deposit is confirmed. If it is out of stock, the lead time depends.
3. How about the shipping?
When the package is small, we will deliver the goods via international Express like FedEx , DHL,TNT and UPS and so on. Door to door delivery service will be provided; while the goods have high weight and volume, we suggest using air or sea shipment.
4. 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.
5. What are the advantages of your products?
A. Good quality and competitive prices
B. Strict quality control during production process.
C. Professional operations in processes of production, sales, assembling, packaging and shipping
D. Good after-sale service. Professional online technical support can be provided. Moreover, if there is any problem of the goods, we will help to solve the problem or provide replacement of the goods
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.
