תיאור
Discription
The DVB-T Modulator is a high performance modulator developed according to DVB-T (EN300744) standard. It adopts advanced framing structure, channel coding and modulation technology. And it also supports both MFN (Multi-frequency network) and SFN (single frequency network). It has 2 AIS input ports, one GPS.10MHZ input port and one 1 PPS input port. In order to improve the output performance of the transmitter, the DVB-T modulator can simultaneously support linear and nonlinear pre-correction. This device supports local and remote control through NMS software.
The DVB-T Modulator is a high performance modulator developed according to DVB-T (EN300744) standard. It adopts advanced framing structure, channel coding and modulation technology. And it also supports both MFN (Multi-frequency network) and SFN (single frequency network). It has 2 AIS input ports, one GPS.10MHZ input port and one 1 PPS input port. In order to improve the output performance of the transmitter, the DVB-T modulator can simultaneously support linear and nonlinear pre-correction. This device supports local and remote control through NMS software.
תכונות
Fully complying with DVB-T standard (EN300744)
Both SFN and MFN support
Transfer mode 2k, 4k, 8k optional
Hierarchy modulation Alpha1, 2 ו 4 optional
Transfer bandwidth 6M, 7M and 8M optional
Supporting linear and non-linear correction
Excellent phase noise and MER performance, MER ≥40db
RF output range 110~860MHz, 1hz step
Two ASI inputs supporting hot backup
Constant temperature crystal oscillator, frequency stability is high up to 0.1ppm
Full-size front panel LCD display and keyboard, NMS management.
Specifications
| Input | 2 channels ASI input, hot backup, BNC port | |
| GPS 10Mhz reference clock input, BNC port | ||
| GPS 1PPS input, BNC port | ||
| Modulation | standard | EN304 744 |
| FFT | 2K,4K,8K | |
| bandwidth | 6M,7M,8M | |
| constellation | QPSK,16QAM,64QAM | |
| Guard interval | 1/4,1/8,1/16,1/32 | |
| FEC | 1/2,2/3,3/4,5/6,7/8 | |
| Hierarchy modulation | Alpha=1,2,4 | |
| RF output | ASI loop out | 2channels ASI loop out, BNC port |
| interface | N type, 50Ω impedance | |
| RF range | 110~860MHz,1hz step | |
| ATT | -16dbm~0dbm,0.5db step | |
| MER | ≥ 40db | |
| Linear pre-correction | Correction points | 16 |
| Non-linear pre-correction | Correction points | 256 |
| System | Full-size front panel LCD display and keyboard, NMS management | |
| Software upgrading | ||
| General | Demission (W*L*H) | 482mm×455mm×44.5mm |
| מִשׁקָל | 4.9ק"ג | |
| Temperature | 0~45°C(operation),-20~80°C(storage) | |
| ספק כוח | AC 110V±10%,50/60Hz or AC 220V±10%,50/60Hz | |
| Consumption | 28.6W | |