- Overview
- Product Description
- Product Features
- Main Application
- Technical Index
- Flow Chart
- Shipping Mode
- FAQ
Basic Info.
Product Description
GT is the well-known manufacture in analog externally modulated optic transmitter around the world. HT8500T 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.=0.35MHz), 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. HT8500T EM optic transmitter is applicable for the network upgrading and expansion of WDM system. The whole unit signal modulation adopts CATV special LiNbO3 external modulator of American JDS-U company and Huatai optimized control technology with independent intellectual property , so HT8500T EM optic transmitter can reach high index of back to back CNR ≥ 53.5dB, 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 optical port of EM optic transmitter can be installed in the front panel (The back panel is also available if needed).
HT8500T, advanced 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.
1. Externally modulated technology for HT8500T 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.
2. 1+1 powers supply back , up hot-plug function available.
3. Narrow line width (Typ=0.35 MHz), low noise, and DFB continuous wave laser, be propitious to reduce dispersion effect.
4. The operating bandwidth is up to 47~1000MHz.
5. CNR ≥ 53.5dB and excellent CTB, CSO index.
6. SBS: 13~19dBm, continuous adjustable.
7. 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.
8. AGC/MGC mode is optional at spot; OMI can be optimized at spot.
9. Perfect RS232 communicate interface.
10. Advanced SNMP network management function.
11. Casing temperature auto-control.
1. Used in the over-long trunk and distribution net in the large and middle cable television central station head-end.
Analogue digital hybrid transmission > 200Km (with dispersion compensation).
Pure digital transmission (Without dispersion compensation) > 400Km,
(With dispersion compensation) >700Km.
2. VAS in DWDM fiber CATV system
3. CFG dispersion compensates system.
| Performance | Index | Supplement | |||
| Optical 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/ºC) | -1~0 | Tc=20~70ºC | ||
| Linewidth | (MHz) | Typ.=0.35 | 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) | 7.0, 8.5, 10,11, 12, 13 | 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) | ≥53.5 | ≥52 | Back to back | |
| CNR2 | (dB) | ≥51.5 | ≥50 | 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) | 90~265 | 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 | |||
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.