Transcript
8VSB Frequency Agile Demodulator/Decoder DESCRIPTION
DDM-520/DDM-540 FEATURES
The DDM-520 and DDM-540 are frequency agile 8VSB demodulators with MPEG-2 HDTV/ SDTV decoders. These demodulators are capable of demodulating an ATSC transmission received over the frequency range from 54 MHz to 860 MHz, Off-air Channels 2 to 69 and Cable channels 2-134.
12 Button Numerical Keypad for direct data entry of channel Signal to Noise Ratio and Bit Error Rate information available HD/SDI output (DDM-540) Closed Caption decoded and displayed on the output video Transport stream display selection for PSIP table information Auto programming of available 8VSB channels SMPTE 310M, DVB-ASI, DVB-SPI transport stream inputs and outputs Constellation diagram display selection CAV, SVGA, SDI, NTSC outputs Dolby® Digital (AC-3 TM) and Stereo Audio outputs Standards available: ATSC
The DDM-520 and DDM-540 display the program information of the received transmission on the video output. The program information tables selection includes PAT, PMT, MGT, VCT, EIT, STT, and EPG. There is also a selection for Closed Captioning to be decoded and displayed on the video output. An additional available display is the Constellation Diagram used for viewing the quality of the modulated signal. The MPEG-2 transport stream generated by the DDM-520 and DDM-540 is compliant with the SMPTE 310M, DVB-ASI and DVB-SPI requirements. The MPEG-2 HDTV decoder decompresses the demodulated MPEG-2 program streams, accepting either HDTV (main profile at high level) or SDTV (main profile at main level) formats, and generates a multitude of signals including RGB and YPBPR analog Component Video, NTSC analog composite video, SVGA and Serial Digital signals for monitoring the video program selected. The DDM-540 provides for additional monitoring of signals with an HD/SDI output that conforms to SMPTE 292M and 299M.
DDM-520 Back Panel
An internal color-bar generator can be selected as a source for the video output. A separate connector provides for the selected AES Dolby® Digital (AC-3TM) encoded audio bit stream output. In addition, the decoder will produce an analog stereo audio output for the selected channel for monitoring purposes.
DDM-540 Back Panel
The DDM-520 and DDM-540 are packaged in a standard 2RU rackmountable chassis. The front panel has a 4-line, 20-character LCD for viewing channel and configuration information.
SPECIFICATIONS DEMODULATOR TUNER Tuning Range: Input Range: Connector:
Specifications and designs are subject to change without notice.
Connectors: D.C. Offset: DVB-ASI Data Rate: Voltage Level: D.C. Offset: Rise Time: Jitter: Connectors:
Tunes terrestrial VHF/UHF and cable frequencies from 54 to 860 MHz (VHF Channel 2-13, UHF Channel 14-69, cable 2-134) -16 to +14 dBmV "F", 75 ohms female
TRANSPORT STREAM INPUTS AND OUTPUTS SMPTE 310M Data Rate: Voltage Level: D.C. Offset: Data Rate Accuracy: Rise Time: Jitter: Connectors: LVDS Format: Voltage Level:
19.39 Mb/s 800 mV p-p ±10% ±0.5 VDC ±2.5 ppm (dependent on received data rate) <5 ns <2 ns BNC, 75 ohms female
25-pin D, female 1.25 VDC ±0.1 VDC 270 Mb/s 800 mV p-p ±10% ±0.5 VDC <1.2 ns (20% to 80%) <0.4 ns (1 Hz to 190 kHz) BNC, 75 ohms female
DVB-SPI, 188 byte, parallel Low Voltage Differential Signal (LVDS) 0.3 to 0.4 V p-p (differential signaling)
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Demodulators
8VSB Frequency Agile Demodulator/Decoder DECODER VIDEO OUTPUT YPBPR Output: Connectors: Voltage Level: SYNC On Y:
RGB Output: Voltage Level: HD and VD: H+V sync: Connectors: SVGA Output: Connector: Maximum Voltage Level: RGB: HD and VD: NTSC Output: Connector: S Video Output: Connector: SDI/480i Output Voltage Level: D.C. Offset: Connector: HD/SDI Output (DDM-540) Voltage Level: D.C. Offset: Connector:
DDM-520/DDM-540
1080i, 720p, 480i or 480p BNC, 75 ohms female 700 mV typical per SMPTE 240M SMPTE 274M SMPTE 296M 1080i, 720p, 480p or 480i 700 mV typical TTL TTL BNC, 75 ohms female RGB, Hsync and Vsync 15-pin D-sub high density, female 1V TTL 1V p-p typical into 75 ohms BNC, 75 ohms female 1.0 V p-p typical into 75 ohms mini-DIN, female Conforms to SMPTE 259M-C 800 mV p-p ±10% 0.0 V ± 0.5 VDC BNC, 75 ohms female Conforms to SMPTE 292M and 299M 800 mV p-p ±10% 0.0 V ± 0.5 VDC BNC, 75 ohms female
AUDIO OUTPUT
Dolby® Digital (AC-3TM) or AES Output Level: 0.5 V p-p ±20% into 75 ohms Connector: XLR male Stereo Output Balanced Stereo left and right Frequency Response: 20 Hz to 20 kHz ± 2 dB Connectors: XLR male Audio Impedance: 600 ohms
REMOTE CONTROL Communications: Supported Baud Rates: Connector:
POWER REQUIREMENTS Input: Consumption:
ENVIRONMENTAL
Operating Temperature: Storage Temperature: Humidity:
RS-232 115200 bps 9-pin D-sub, female 100-240 VAC, 50/60 Hz 95 VA 0° to +45° C - 20°to +50° C 80% maximum (non-condensing)
MECHANICAL Dimensions: Height: Width: Depth: Weight:
3.5'' (8.9 cm) 19'' (48.3 cm) 14" (50.3 cm) 12.0 lb. (5.4 kg)
STANDARD ACCESSORIES Operator's Handbook Power Cord
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Demodulators
