- 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 optical transmitter in the world. HT8500A, a kind of low cost 1550nm Externally Modulated Optical transmitter, is specially designed for networking application of second-grade service area. It is named as HT8500A second-grade service area 1550nm Externally Modulated Optical Transmitter. HT8500A series Externally Modulated CATV transmitter adopts low noise, narrow bandwidth, and continuous wave laser DFB laser as its light source and adopts low cost single-output LiNbO3 external modulator that is specially designed by JDS-U to modulate signal , which reduce the cost of the transmitter largely. Based on a series of characterized optimization and technical innovation, HT8500A Optical transmitter can reach excellent system index with flatness ≤ 0.75dB in-band 47~862MHz, 13dBm SBS, point to point >50Km, (0dBm receiving) CSO ≤ -65dB, CTB ≤ -65dB, CNR ≥ 52dB. The whole unit is equipped with perfect RS232 communication interface, SNMP network management, 1+1 back-up power supply, and casing temperature auto-control. All the optical port for HT8500A Optical transmitter can be installed in the front panel (The back panel is also available if needed).
HT8500A second-grade service area 1550nm Externally Modulated Optical Transmitter, with its high index, high reliability and outstanding P/P ratio, is an ideal choice for second-grade service area.
1. High performance: no laser chirp, low dispersion distortion, high extinction ratio, with excellent characteristic within 47~862MHz in-band.
2. Narrow linearity width (Typ=1MHz), low noise, DFB continuous wave laser.
3. The operating bandwidth is up to 47~1000MHz.
4. High index: unique innovation technology, offers excellent CNR, CTB and CSO.
5. SBS: 13dBm, point to point>50Km optical transmission.
6. ITU standard wavelength, ±200GHz (±1.6nm) adjustable.
7. AGC/MGC mode is optional at spot. OMI can be optimized at spot.
8. Optional RS232 communication interface and SNMP.
9. Optional 1+1power supply backup.
10. Casing temperature auto-control.
11. Excellent P/P ratio.
HT8500A Optical transmitter used in second-grade service area of sub-station. With excellent P/P ratio, provide second-grade users with high quality and high reliability value added service such as RFTV, IPTV, VOD and so on. It can avoid the limitation on transmission bandwidth and distance as well as system CSO deterioration caused by laser chirp for adopting 1550nm direction modulated optical transmitter.
| Performance | Index | Supplement | |||
| Optical feature | Operating wavelength | (nm) | 1548~1563 | HT8500AC | |
| ITU-TG.692 | HT8500AU | ||||
| Wavelength ADJ. range | (nm) | ±1.6 (±200GHz) | HT8500AU | ||
| Wavelength ADJ. mode | ±0.05nm stepping | HT8500AU | |||
| Linewidth | (MHz) | ≤1.0 | FWHM( △λ ) | ||
| Side mode suppression ratio | (dB) | ≥45 | SMSR | ||
| Equivalent noise intensity | (dB/Hz) | ≤-160 | RIN ( 20~1000MHz ) | ||
| Output power of each port | (dBm) | ≥3.0, ≥4.5, ≥6.0, ≥7.0, ≥9.0 | |||
| Return loss | (dB) | ≥55 | |||
| 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) | ≥52 | ≥50.5 | Back to back | |
| CNR2 | (dB) | ≥50.5 | ≥49 | 50Km optical fiber, 0dBm receive | |
| CTB | (dB) | ≤-65 | ≤-65 | ||
| CSO | (dB) | ≤-65 | ≤-65 | ||
| SBS restrain | (dBm) | 13 | 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) | ( " ) | 19×14.5×1.75 | |||
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.