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Specifications
4 asi input, supporting backupdvb-t modulator
adaptive linear/non-linear digital pre-distortion (DPD)
Outline
The DEXIN NDS2401C DVB-T Modulator is a high performance modulator developed according to the DVB-T (EN300744) standard. It adopts advanced framing structure, channel encoding and modulation technology. It supports both MFN (Multi-frequency network) and SFN (single frequency network). It equipped with four ASI hot backup input, one GPS 10MHz input port and one 1PPS input port. In order to improve the output performance of the transmitter, this DVB-T modulator also simultaneously supports adaptive linear and nonlinear digital pre-distortion. Moreover, this device facilitates the local and remote control with SNMP software.
Features
- Fully complying with DVB-T standard (EN300744)
- 4 ASI in, 1 RF in, 10MHz reference clock and 1PPS in
- Support both SFN and MFN
- Transmission mode: 2k, 4k, 8k
- Hierarchical modulation: Alpha1, 2 and 4
- Transmission bandwidth 6M, 7M and 8M
- Excellent phase noise and MER performance, MER≥42db
- RF output range 30~960MHz, 1hz step
- Supports adaptive linear digital pre-distortion (DPD)
- Supports adaptive non-linear digital pre-distortion (DPD)
- Constant temperature crystal oscillator, frequency stability is high up to 0.1ppm
- Full-size front panel LCD display and keyboard, SNMP software management.
Specifications
Input |
4 channels ASI input, hot backup, BNC port |
|
GPS 10Mhz reference clock input, BNC port | ||
GPS 1PPS input, BNC port | ||
1 RF input for DPD -25dbm~+5dbm | ||
Modulation |
standard |
EN300 744 |
FFT |
2K,4K,8K |
|
bandwidth |
5M, 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 |
|
Hierarchical modulation |
Alpha=1, 2, 4 |
|
RF output |
interface |
N type, 50Ω impedance |
RF range |
30~960MHz,1hz step |
|
ATT |
-26dbm~+3dbm,0.1db step |
|
MER |
≥ 42db |
|
Non-linear DPD |
over 10db ACPR improvement (normally) |
|
Linear DPD |
over 10db non-flatness adjustment(normally) |
|
System |
LCD display & keyboard operation, NMS operation |
|
Software upgrading through network | ||
General |
Demission (W*L*H) |
440mm×414mm×44.5mm |
Weight |
4.9kg |
|
Temperature |
0~45°C(operation),-20~80°C(storage) |
|
Power Supply |
AC 110V±10%,50/60Hz or AC 220V±10%,50/60Hz |
|
Power Consumption |
||
Principle chart
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