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MDAT01 ATSC-T Modulator

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Features

1. Fully compliant with ATSC, ATSC-MH(optional) and ATSC-MH SFN(optional) standards.

2. Powerful ADPCTM (Adaptive Digital Pre-Correction) non-linear distortions and precision demodulation technologies will realize high precision, automatic and adaptive function of all linear and non-linear pre-treatment. Dual feedback input port will separately sample front and back signal from filter for in-band un-flatness.

3. Innovative DDRFTM(Direct Digital RF) broadband automatic balancing technology achieves near perfect performance: MER≥39dB,shoulder level≤-60dB,out of band spurious≤-55dB, out of adjacent channel﹤-60dB and ultra-low phase noise

4. Adopt unique adaptive output impedance AIMTM patented technology which ensure output impedance match

5. Built-in GPS module will enhance system integration,lower system complexity

6. Real-time ,continuous and automatic measurement functions of terminal amplified MER and shoulder level, which make sure stable signal quality monitoring

7. Support remote system upgrade via RJ45

8. Seamless switching between 2ASI and 2ASI/SMPTE-310M automatically detecting

9. Built-in code stream adaptive module&high-precise PCR adjustment

10. Support dual hot backup switch, switching time lower than 0.01 second

11. Real-time temperature monitoring and display

12. Easy-to-use UI, web remote monitoring function, support RS232/RS485 external control and provide complete communication protocol for transmission system integration

Specification


TS Inputs

2ASI and 2ASI/SMPTE-310M

Auto detect, automatic/manual switch

Input Bit-rate (Max)

19.3926585Mbps

Connector

BNC female,75Ω

Modulation&

Channel Coding

Bandwidth

6MHz

Supported Mode

8VSB

Network Mode

SFN & MFN

SFN Time Delay Range

0~1s

SFN Time Delay Step

100ns

Test Mode

CW mode/PRBS mode

RF Output

Frequency

VHF/UHF, in step of 1Hz

RFOUT Level

-25dBm~+5dBm

In steps of 0.05dB

RFOUT1 Level

monitoring output, 20dB lower than RFOUT level

Level Stability

﹤±0.1dB

Frequency Stability

Internal reference source﹤±0.5x10-7 or in accordance with Ext. accuracy ; internal GPS﹤0.1x10-7

Symbol Rate

10.7622378MHz

MER

﹥39dB

Amplitude Flatness

﹤±0.5dB

Shoulder Level

﹤-60dB

Pilot Amplitude Error

≦±0.1dB

Out of band spurious

﹤-50dB ;﹤-60dB

Phase Noise(@2kHz)

﹤-107dBc/Hz

Return Loss

﹥20dB

Output Interface

N type female,50Ω

Reference Clock

Internal 10MHz

Frequency Stability

﹤±0.05ppm

Aging

﹤±0.5ppm/year

Output Level

0dBm±3dB

Internal GPS(optional)

Frequency Stability

﹤±0.01ppm

Locking 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

RFINB

Feedback signal before BPF

RFINA

Feedback signal after 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 Panel

6keys, 6 LED lights

40x2 LCD screen with back light

Remote Control

RJ-45, 10/100 base-T

Support remote upgrade

RS232 Interface

RS232 or RS485 DB-9 male

Others

Power Supply

88~264VAC,50/60Hz

Operating Temperature

0℃~50℃(+32℉~+122℉)

Operating Humidity

≦95%

Dimensions

1U, 19’’ standard case

Weight

5kg (net)/7kg (gross)

Alarms

Transport stream input signal lost or format error,overflow

Pre-correction feedback signal monitoring

GPS lost or unlock or 1 PPS signal lost,SIP lost

Overheat


Principle Chart

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