Digital Block Converter & COFDM
Central Receive antenna systems employ block down converters to convert the higher frequency bands such as 7 and 13 GHz down to the 2 GHz range for transmission over the coaxial cable run to the central receiver which is normally located some distance from the antenna. |
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Digital ENG Using the Analog Coder System
The ENG Analog Coder is another innovative Nucomm product that makes the conversion to the new FCC 2 GHz plan simple easy and inexpensive. |
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ENG Digital Video Testing
PowerPoint presentation in PDF format |
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ENG Systems using COFDM Technology
PowerPoint presentation in PDF format campac |
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Expanding ENG Central Receive Sites to Include COFDM
The application of COFDM to ENG is becoming much more the Modulation of choice. Several reasons driving the switch to COFDM include:
- Superior reception from sites not accessible using analog modulation methods.
- Superior reception from moving vehicles such as helicopters and moving ENG vans.
- Reduced bandwidth requirements for a high quality picture; 6, 7 or 8 MHz.
- Price of COFDM systems is now at more affordable levels and still coming down.
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High Data Rate ENG System Using VSB Modulation
The High Data Rate 70 MHz VSB Digital Mode is another innovative Nucomm product designed specifically for Digital ENG operation. When attached to a digital ENG transmitter such as the Nucomm Digital Newscaster ENG truck transmitter, the system can simultaneously transmit a variety of signals within the new FCC 2 GHz 12 MHz bandwidth as well as standard 25 MHz bandwidths. |
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Nucomm Analog Coder Test at KAKE over 24 Hops
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PCS Interference to ENG & Proposed Solutions
- PCS - ENG Frequency Spectrum Allocation; Present & Future
- PCS - ENG Topology & Parameters that affect Interference
- Various Degrees of Interference
- LNA Requirements to Reduce Interference
Filter Requirements to Reduce Interference
- Example of Ideal LNA for Operation in PCS Environment
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The Analog Coder
As the HDTV build out enters its final phase
engineering managers at small to mid-market
network affiliates and independent stations are still
looking for cost-effective solutions to completing
their digital upgrades. One area of expense in the
transmission path is the microwave used for STL
and intercity relay applications. The ability to reuse
existing analog links to support ATSC digital
signals would indeed be a welcome development.
The objective would be an upgraded link, capable
of transporting the ATSC digital signal at 19.39
Mbps, as well as control monitoring and
telecommunications signals without loss of system
performance. In fact, the need has already been
answered. |
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The Analog Coder-HD Over an Analog Links
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