DM1010
DTV 신호 분석 및 복조 시스템
폭넓은 RF 신호 및 데이터의 분석
54-806 MHz의 System M 채널
VHF 8VSB 출력
IF 대역 : 4, 44 MHz
FFT Spectrum, Complex Constellation, Eye Diagram, Echo Profile 출력
text 파일로 측정값 저장
데이터 분석을 위한 SMPTE 310M, ASI, LVDS 출력 기능 The DM1010 is a wide dynamic range, network connected DTV Measurement
Receiver designed for installation at the television transmitter site or connected to an
antenna at the studio. Based on RF measurement frontend design normally
found in high-performance spectrum analyzers, the DM1010 features
automatically ranged attenuators rather than a more conventional analog AGC. This
design allows the repeatable, NISTtraceable performance required of a true
measurement system. This high performance RF frontend and a proprietary
demodulator with DTV measurement technology licensed from Tektronix, provides
an economical networked measurement solution for television broadcasters.
The system design provides independent measurement and monitoring paths. The
measurement path characterizes the RF signal, and documents RF and demodulated
data parameters to clear text files for historical analysis. The precision RF path
mixes the input 8VSB signal to channel 7 or 8 for distribution of the station’s full program
stream to house DTV receivers. A high quality 44 MHz IF signal is also provided to
drive Z Technology’s audio/video receiver for program content monitoring.
An included WinDM-Pro™ software application runs on a Windows™ PC, either
directly or network connected to the DM1010 Measurement Demodulator, providing
graphic displays of parameters available in text form on the system front panel.
A received DTV signal can be evaluated for RF degradations that may affect a viewer’s
ability to receive the signal. Measurements include 8VSB multipath profile, sync and
equalizer decoder lock, data signal-to-noise ratio and error vector magnitude before and
after equalization, threshold of visibility, segment error rate and NIST traceable
received power level. The included WinDM Pro Windows™ application software
facilitates real-time testing while RF and data figures of merit are recorded into cleartext
data history files for later analysis.
In addition to measuring documenting signal parameters to a PC file, the DM1010
provides SMPTE 310M, ASI and LVDS transport stream outputs for data analysis,
and an ATSC/8VSB signal is provided on VHF channel 7 or 8 for distribution to DTV
receivers throughout the plant.
The DM1010 is a uniquely designed system consisting of a rugged instrumentation-type
rack-mount package that is powered from 90 - 240 VAC power mains.
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ds_dm1010.pdf
