QPSK Modulator for digital TV headend equipment

In addition to QPSK modulation, the QPSK Modulator combines with demodulator, DVB multiplexer and scrambler (option).

QPSK(DVB-S)Modulator

In addition to QPSK modulation, the QPSK Modulator combines with demodulator, DVB multiplexer and scrambler (option).  Supports 1 tuner input and 2 ASI inputs, and then Re-Multiplex, scramble and modulates the input signal to QPSK (DVB-S) signal. High-performance MER, CNR, phase jitter and phase PER.

Features

1 tuner input, supports DVB-C, DVB-T, DVB-S, DVB-S2 (option)

2 independent TS inputs (option)

3 input (1 tuner input, 2 independent TS streams input) multiplexing functions (option)

Encrypt media contents by DVB-CSA, support simulcrypt

Advanced PSI/SI processing and PCR correction

Static PID filtering

Supports DVB-T ETSI/EN 300 421 standard

Network management Support

Specifications

DVB-C QAM Demodulation

Input Symbol Rate    1 — 7MS/s (PAL), 1 — 6MS/s (NTSC)

Constellation    16/32/64/128/256QAM

Bandwidth    6M or 7M or 8M

Input Frequency    50 — 860MHz

Input Level    -25 — 20dBmV

Input Impedance   75Ω, IEC Female (7/8MHz) or F Female (6MHz)

 

DVB-T COFDM Demodulation

Demodulation Mode    COFDM

Constellation    QPSK, 16-QAM, 64-QAM

Bandwidth    8 MHz

FFT Mode    2K/8K

Guard Interval    1/4, 1/8, 1/16, 1/32, off

FEC Code Rate    1/2, 2/3, 3/4, 5/6, 7/8

Input Frequency    470 — 862MHz, 174 — 230MHz

Input Level    -70 — -20dBmV

Input Impedance   75Ω, IEC Female (7/8MHz) or F Female (6MHz)

 

DVB-S QPSK Demodulation

Input Frequency    950 — 2150MHz

Input Level    -65dBm — -25dBm

Input Impedance    75Ω, F-female

Symbol Rate    2 — 45MBauds (SCPC or MCPC)

Rolling off Factor    0.35

FEC Code Rate    1/2, 2/3, 3/4, 5/6, 7/8

DVB-S2 Demodulation (Compatible with DVB-S)

Input Frequency    950 — 2150MHz

Input Level    -65dBm — -25dBm

Input Impedance    75Ω, F-female

Symbol Rate    1 — 45MBauds (8PSK)

Constellation    8PSK/QPSK

FEC Code Rate    DVB-S2: 1/2, 3/5, 2/3, 3/4, 4/5, 5/6, 8/9, 9/10

DVB-S: 1/2, 2/3, 3/4, 5/6, 7/8

 

Multiplexing

Advanced PSI/SI regeneration and editing

PID and Service ID mapping, PCR correction

Static PID filtering

Support EPG/DBC insertion

Support receiving data from the Ethernet and multiplexing into TS stream

High performance with input and output bit-rates up to 200Mbit/s

ASI input packet length 188/204 bytes Self-adapting

 

Scrambling

Support scramble nominated program or transport stream

Encrypt media contents by DVB-CSA

Support Simulcrypt Mode and multicrypt CA systems

Input valid rate   1 — 60Mbps

Generation of scrambling control words, the minimum scrambling period is 5 seconds

Adaptive Bit Rate, PCR correction

Scrambling up to 100 programs at one time, support PID scrambling

Processing of PSI/SI

QPSK Modulation

Output Frequency   (Frequency Agility) 45 — 860MHz, Step by 100 KHz

Output Level    85 — 113dBμV, Step by 0.5dB

FEC Code Rate    1/2, 2/3, 3/4, 5/6, 7/8

Symbol Rate    1 — 45MS/s adjustable

Interface

TS Input   BNC, 75Ω

RF Input   F-female, 75Ω

TS Output   BNC, 75Ω

IF Monitor Output   BNC, 75Ω

RF Output   F-female, 75Ω

Network Interface   Ethernet interface ( RJ45, 10/100M adaptive )

General

Operating Temperature    5°C to 45°C

Storage Temperature    -25°C to 80°C

Humidity    10% — 75%

Power Supply    AC90 — 260V, 50/60Hz

Power    40W

Dimension    483 × 300 × 44mm

Weight    3kg

QPSK Modulator for digital TV headend equipment