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MDIS05 ISDB-T Modulator

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Features

•Fully compliant with ISDB-T and ISDB-TB standards

•Innovative DDRFTM(Direct Digital RF) broadband automatic balancing technology achieves near perfect RF performance: MER ≥ 45 dB, shoulder level ≤ -58 dB, out of band spurious ≤ -60 dB and ultra-low noise floor, etc

•Powerful linear and non-linear ADPCTM(Adaptive Digital Pre-Correction) with patented multi-dimensional pre-correction and precision demodulation technologies

•Independent feedback for adaptive SWR optimization function maximizes emission signal quality after the transmitter band-pass filters (BPF)

•Integrated GPS receiver

•Continuous, automatic and real time measurement and display of IMD (Intermodulation Distortion within ±500 kHz) and SNR of transmitted signal

•Digital ultra-wideband phase noise processing technology automatically detects, tracks and compensates phase noise to achieve excellent performance

•Patented AIMTM(Adaptive Impedance Match) technology ensures impedance matching at RF output

•Seamless switching between up to 4 inputs (ASI format) automatically or manually

•Real-time input transport stream rate display

•MFN and SFN support

•Instant alarms and protective spectrum output during abnormal conditions

•Real-time temperature display and overheat alarm

•Powerful control and monitor interfaces (web/RS232/RS485/front panel) and easy-to-use UI

•Support firmware remote update via RJ45

Technical Specifications


Input

2 channels ASI hot-backup Inputs, automatic & manual switchover

Support Packet/Burst mode, auto-identification

Connector

BNC female, 75Ω

Modulation & Channel Coding

Bandwidth

6MHz

Supported Modes

IFFT

2K, 4K, 8K

RS Coding

RS (204,188)

Code Rate

1/2, 3/5, 2/3, 3/4, 4/5, 5/6

Guard Interval

1/4 , 1/8, 1/16, 1/32

Constellations

BPSK,QPSK,16QAM,64QAM

Time Inter-leaver

0~16

Network Mode

SFN & MFN

SFN Time Delay Range

0~1s

SFN Time Delay Step

100ns

Test Mode

CW Mode/PRBS Mode

RF Output

Connector Frequency

compliant with according standard in steps of 1Hz

Level

-10dBm~+5dBm, in steps of 0.05dB

Level Stability

﹤±0.1dB

Frequency Stability

﹤±0.5x10-7 or in accordance with Ext.

accuracy or﹤0.1x10-7

MER

﹥39dB

Amplitude Flatness

﹤±0.5dB

Shoulder Level

﹤-58dBc

Out of Band Spurious

﹤-60dB

Return Loss

﹥26dB

Phase Noise

100Hz ﹤-90dBc/Hz

1kHz ﹤-95dBc/Hz

10kHz ﹤-100dBc/Hz

100kHz﹤-115dBc/Hz

Connector

N-type, BNC, 50Ω

Reference Clock

Internal 10MHz

Frequency Stability

﹤±0.05ppm

Aging

﹤±0.5ppm/year

Output Level

0dBm±3dB

Internal GPS

Frequency Stability

﹤±0.01ppm

Acquisition Time

≦15 minutes

External 10MHz

Input Level

AC-coupled, Vp-p≧300mV

Input Connector

BNC female, 50Ω

External 1 PPS

Input Level

TTL

Input Connector

BNC female, 50Ω

Trigger

Positive transition

Linear and non-linear ADPCTM

Dual Feedback Signal

RFINA

Feedback signal after BPF

RFINB

Feedback signal before BPF

Feedback Level

-35dBm~0dBm (suggested value is -15dBm)

Adaptive and Automatic

No additional instruments or manual operations needed

Continuous measurement and display of SNR and IMD

High Efficiency

Less than 10 Minutes

High Precision

64-bit digital signal processing

Over 20,000 independent points of amplitude and phase correction

High Performance

Correction of amplitude, phase and group delay

Up to 10dB of MER improvement

Up to 15dB of shoulder improvement

In-band flatness:﹤±0.5dB

Process up to 7th inter-modulation product

Control Interfaces

Front Pane

6keys, 6 LED lights

40x2 LCD screen with back light

Web Interface

RJ-45, 10/100 base-T

Support remote upgrade

RS232 Interface

Connector

DB-9 male

RS485 Interface

Connector

DB-9 male (optional)

Others

Power Supply

88~264VAC,50/60Hz

Operating Temperature

0℃~50℃(+32℉~+122℉)

Operating Humidity

≦95%

Size

1U, 19’’ wide cabinet

Weight

10 Ibs (net)/15 Ibs (gross)

Alarms

Transport stream input signal lost or format error

Transport stream input data rate overflow

GPS lost or unlock or 1 PPS signal lost

Feedback signal level out of range during ADPC

Feedback signal lost or level change abnormally during ADPC

Overheat


Principle Chart

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