2011年08月24日
professional manufacturer
We're one ORIGINAL professional manufacturer of satellite and Terrestrial TV equipments and accessories.Here we'd like to get in touch with importers, distributors,retailers throughout the world. Since 2003, we have been exporting all kinds of satellite receivers and terrestrial receivers, and we carry a wide-range of the following products:
PAL-LThe PAL L (Phase Alternating Line with L-sound system) standard uses the same video system as PAL-B/G/H (625 lines, 50 Hz field rate, 15.625 kHz line rate) but with 6 MHz video bandwidth rather than 5.5 MHz. This requires the audio subcarrier to be moved to 6.5 MHz. An 8 MHz channel spacing is used for PAL-L.
System AThe BBC tested their pre-war 405 line monochrome system with all three colour standards including PAL, before the decision was made to abandon 405 and transmit colour on 625/System I only.
1.Satellite TV Equipments
Including satellite receivers, satellite signal level meter, satellite finder(meter), HD DVB-S2 Receivers, DVB-S2 Meter with Spectrum Analzyer(in real time)
2.Terrestrial TV Equipments
Inlcuding DVB-T receivers, DVB-T Meter, HD MPEG-4 DVB-T Meter, HD MPEG-4 DVB-T Receiver, SD MPEG-4 DVB-T Receiver
3.Combo Equipment:
Including SD MPEG-2 Satellite&Terrestrial Combo Meter, HD MPEG-4 satellite&Terrestrial Combo Meter
If you're interested in our products, please kindly contact us for your interest.
To some extent the types of errors most likely to be present with DAB can be mathematically predicted and therefore corrected for. The addition of FEC requires extra information to be transmitted at the same time as the original traffic data and therefore requires an increased channel capacity, needing extra bandwidth, compared to if it had been uncoded. DAB carries different 'strengths' of FEC, a stronger one being used for the control of critical features in the receiver.
PAL-LThe PAL L (Phase Alternating Line with L-sound system) standard uses the same video system as PAL-B/G/H (625 lines, 50 Hz field rate, 15.625 kHz line rate) but with 6 MHz video bandwidth rather than 5.5 MHz. This requires the audio subcarrier to be moved to 6.5 MHz. An 8 MHz channel spacing is used for PAL-L.
System AThe BBC tested their pre-war 405 line monochrome system with all three colour standards including PAL, before the decision was made to abandon 405 and transmit colour on 625/System I only.
1.Satellite TV Equipments
Including satellite receivers, satellite signal level meter, satellite finder(meter), HD DVB-S2 Receivers, DVB-S2 Meter with Spectrum Analzyer(in real time)
2.Terrestrial TV Equipments
Inlcuding DVB-T receivers, DVB-T Meter, HD MPEG-4 DVB-T Meter, HD MPEG-4 DVB-T Receiver, SD MPEG-4 DVB-T Receiver
3.Combo Equipment:
Including SD MPEG-2 Satellite&Terrestrial Combo Meter, HD MPEG-4 satellite&Terrestrial Combo Meter
If you're interested in our products, please kindly contact us for your interest.
To some extent the types of errors most likely to be present with DAB can be mathematically predicted and therefore corrected for. The addition of FEC requires extra information to be transmitted at the same time as the original traffic data and therefore requires an increased channel capacity, needing extra bandwidth, compared to if it had been uncoded. DAB carries different 'strengths' of FEC, a stronger one being used for the control of critical features in the receiver.
Posted by kuama at 17:39│Comments(0)
