DTMR T850: DVB Digital TV Monitoring Receiver

The DTMR-T850 is designed for high quality monitoring of digital terrestrial transmitters

Measuring the ATSC signal at the transmitter output and/or at the antenna is a must to have a real performance measurement of an 8VSB transmission system. To get a real and accurate (±0.5dB) measure, DTMR-850 reaches quality measurement performances (>38dB MER) achievable only with costly studio measurement instruments. Automatic alarms on user preset thresholds, both on level, MER, S/N and eye aperture, let engineers keep confident that the digital signal will cover all the planned reception area.
Also if DTMR-A850 can be used on the field to check signal coverage and quality, it has been designed to test the transmitter at site, without any quality compromise.

SPECIFICATION

FEATURES

• COFDM front-end ETSI EN 300 744 compliant
• TV frequency bands III, IV-V – 6, 7, 8 MHz channels bandwidth
• FFT size: 2K and 8K – hierarchical modes HP and LP
• Internal MPEG-2 demultiplexer-decoder – PAL, SECAM, RGB, and audio outputs
• MPEG2-TS provided on 2 ASI outputs, according to EN 50083-9 standard
• MPEG2-TS ASI input
• RF demodulation quality measurements
• Parts 1,2 &3 of MPEG2-TS analysis according to TR 101 290
• Large pull-out front panel display to access and show configuration data and analysis (results)
• Full remote control via SNMP and web-server (other serial protocols optional)
• Alarm thresholds can be set for each measurement or analysis parameter
• Small size: 19” 1 U cabinet – 100/240 V – 47/60 Hz-power supply

OPTIONS

• Decoded audio/video over the web, for confidence audio/video checking.

RF Analysis

The equipment provides quality measurements of the RF signal:

• BER before Viterbi correction
• BER after Viterbi correction
• MER 38dB ±0.5dB (on the high level input)
• MER 33dB ±1dB (on the low level input @ around -30dBm)
• MER carrier by carrier, with graphical display on a web browser
• RF input level ±1dB
• Frequency and clock rate offsets
• SFN delay (Reference inputs for SFN mode:10 MHz and 1 pps.)