DVB-T Modulator
1. Comply with EN300744 standard.
2. Support 6MHz/7MHz/8MHz band width
3. Inserting SI data
Outline
JXDH-6405 DVB-T Modulator converts input data streams into frequency signals, it meets DVB-T standard. Signals from MPEG-II compact encoder or multiplexer was sent into DVB-T modulator. According to DVB-T standard, such as FEC, interlacing, RS error correction encoding, etc. After IF processing and up-converting into the range of TV channels, signals can be transmitted through HFC and MMDS networks. Its widely used in digital TV, data broadcasting, VOD, Internet, video conference SV.
Features
* Comply with EN300744 standard; support 6MHz/7MHz/8MHz band width
* Error correction follows DVB-T standard
* Operable in QPSK, 16QAM, 64QAM mode
* Support 2K/8K carrier-wave operating mode
* FEC encode supports 1/2, 2/3, 3/4, 5/6 and 7/8
* Secure time interval supports 1/4, 1/8, 1/16, 1/32
* Input interface: ASI and SPI(DS3/E3 optional)
* Input bit rate::1.5~31.67Mbps
* Output band width: 6/7/8MHz
* RF output: 48~860MHz
* Output level: 105dBuV~115dBuV(step adjustable)
* 188 and 204 packet automatic identification; shows real-time data format
* Adopt high capability buffer; ASI interface supports burst and equality TS, while re-construct equality TS.
* Advance output TS efficiency
* Capable of NIT mapping and sending; supports over 44 NIT mapping frequency
* Holds 10 groups of PID filtering and re-mapping function
* Support all PSI/SI data abstraction, modification and analysis
* Inserting SI data
* Null packet filtering and filling
* Performs multiple PCR correction simultaneously
* Monitor and test real-time enter/valid bit rate
* Self-adjust filter circuit design in order guarantees superb SNR (out of band)
* -20dB RF test output is available (IF output is also available)
* Failure alarming
* LCD display
* With RJ45, actualize central NMS, distant upgrade/maintenance (NMS software is optional)
* Power off memory
Specifications
ASI Interface (Asynchronous Serial interface)
Input
|
Connector
|
BNC
|
Impedance
|
75Ω
|
|
Packet format
|
188 or 204 bits (without channel coding)
|
|
Access data rate
|
270Mbps
|
|
Max valid bit rate
|
31.67Mbps
|
|
DVB standard
|
supports burst and equality TS
|
|
Loop output
|
Connector
|
BNC
|
Impedance
|
75Ω
|
SPI input interface (Synchronous Parallel interface)
Connector
|
DB-25 female
|
Packet format
|
188 or 204 bits(without channel coding)
|
DVB Standard
|
LVDS
|
IF interface
IF input
|
Connector
|
BNC
|
Impedance
|
50Ω
|
|
IF frequency
|
36MHz/35.25/36.15/44MHz(optional)
|
|
IF Bandwidth
|
≤8MHz
|
|
Reflect loss
|
≥18dB
|
|
Input level
|
95dBuV(rms)
|
|
IF loop output
|
Connector
|
BNC
|
Impedance
|
50Ω
|
|
IF frequency
|
36MHz/35.25/36.15/44MHz( optional )
|
|
IF Bandwidth
|
≤8MHz
|
|
Reflect loss
|
≥18dB
|
|
Output level
|
95dBuV(rms)
|
RF interface
RF output
|
Connector
|
BNC
|
Impedance
|
75Ω
|
|
Output Frequency
|
48MHz~860MHz(in segment)
|
|
Reflect loss
|
≥15dB
|
|
Output level
|
105dBuV~115dBuV(adjustable)
|
|
Carrier rejection
|
>55dB
|
|
MER
|
≥42dB
|
|
SNR(out of band)
|
≥50dB
|
|
RF output for test
|
Connector
|
BNC
|
Impedance
|
75Ω
|
|
Output level
|
85dBuV~95dBuV(adjutable)
|
Channel signal encoding
Constellation
|
QPSK, 16QAM, 64QAM
|
Channel encoding
|
RS encode, DVB standard
|
FEC encoding
|
1/2, 2/3, 3/4, 5/6, 7/8
|
RS encoding
|
204byte mode
|
IFFT
|
2K/8K
|
Secure time interval
|
1/4, 1/8, 1/16, 1/32
|
MER
|
≥44dB
|
SNR(out of band)
|
≥50dB
|
**For more detailed information, please contact our salesmen.