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- O
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- ┌───────────────────────────────────────────────────┐
- │ ┌───────────────────────────────────────────────┐ │
- │ │ M D S / M M D S ( W I R E L E S S T V ) │ │
- │ └───────────────────────────────────────────────┘ │
- └───────────────────────────────────────────────────┘
-
-
- The information about MDS/MMDS or Wireless Cable was collected by
- John Rice (Sysop) for the Lanta Systems BBS. It was obtained from
- Trade journals and manufactures specification sheets.
-
- This file and future files for Wireless Cable can be found on the
- following BBS.
-
-
- A/V Sync BBS Lanta Systems BBS
- Atlanta, Georgia Atlanta, Georgia
- 300 - 9600 baud 300 - 2400 baud
- (404) 320-6202 (404) 451-0202
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- O
- p1
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-
- ┌──────────────┐
- │ What is MDS? │
- └──────────────┘
-
- MDS is a SINGLE CHANNEL SERVICE!
-
- MDS stands for Multipoint Distribution Service. This is a use
- of the frequency range that was first used by Public School
- Systems for instructional television. The FCC later allowed
- it to be used for Commercial TV Distribution.
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- 1
- p2
-
- ┌───────────────┐
- │ What is MMDS? │
- └───────────────┘
-
- MMDS is a MULTIPLE CHANNEL MDS SERVICE!
-
- ┌───────────────────┐
- │ What is WIRELESS? │
- └───────────────────┘
-
- "Wireless" is the phrase used to describe MMDS, when used in a
- commercial venture as a PAY TV DISTRIBUTION SERVICE. It should
- be noted that the FCC is now using the term "WIRELESS CABLE".
-
- ┌───────────────────────────────────┐
- │ What Frequency Range do they use? │
- └───────────────────────────────────┘
-
- The Channel frequencies allowed for MDS/MMDS are divided into
- 8 Groups of 4 channels with each channel allotted 6 Mhz. Please
- see the frequency chart.
- 2
- p3
-
- ┌─────────┬────────────┬───────────────┬──────────────┬───────────┐
- │ Channel │ Channel │ BAND WIDTH │ VISUAL │ AURAL │
- │ Group │ Number │ in Mhz. │ CARRIER │ CARRIER │
- ├─────────┼────────────┼───────────────┼──────────────┼───────────┤
- │ │ A - 1 │ 2500-2506 │ 2501.25 │ 2505.75 │
- │ A │ A - 2 │ 2512-2518 │ 2513.25 │ 2517.75 │
- │ │ A - 3 │ 2524-2530 │ 2525.25 │ 2529.75 │
- │ │ A - 4 │ 2536-2542 │ 2537.25 │ 2541.75 │
- ├─────────┼────────────┼───────────────┼──────────────┼───────────┤
- │ │ B - 1 │ 2506-2512 │ 2507.25 │ 2511.75 │
- │ B │ B - 2 │ 2518-2524 │ 2519.25 │ 2523.75 │
- │ │ B - 3 │ 2530-2536 │ 2531.25 │ 2535.75 │
- │ │ B - 4 │ 2542-2548 │ 2543.25 │ 2547.75 │
- ├─────────┼────────────┼───────────────┼──────────────┼───────────┤
- │ │ C - 1 │ 2548-2554 │ 2549.25 │ 2553.75 │
- │ C │ C - 2 │ 2560-2566 │ 2561.25 │ 2565.75 │
- │ │ C - 3 │ 2572-2578 │ 2573.25 │ 2577.75 │
- │ │ C - 4 │ 2584-2590 │ 2585.25 │ 2589.75 │
- └─────────┴────────────┴───────────────┴──────────────┴───────────┘
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- 3
- p4
-
- ┌─────────┬────────────┬───────────────┬──────────────┬───────────┐
- │ Channel │ Channel │ BAND WIDTH │ VISUAL │ AURAL │
- │ Group │ Number │ in Mhz. │ CARRIER │ CARRIER │
- ├─────────┼────────────┼───────────────┼──────────────┼───────────┤
- │ │ D - 1 │ 2554-2560 │ 2555.25 │ 2559.75 │
- │ D │ D - 2 │ 2566-2572 │ 2567.25 │ 2571.75 │
- │ │ D - 3 │ 2578-2584 │ 2579.25 │ 2583.75 │
- │ │ D - 4 │ 2590-2596 │ 2591.25 │ 2595.75 │
- ├─────────┼────────────┼───────────────┼──────────────┼───────────┤
- │ │ E - 1 │ 2596-2602 │ 2597.25 │ 2601.75 │
- │ E │ E - 2 │ 2608-2614 │ 2609.25 │ 2613.75 │
- │ │ E - 3 │ 2620-2626 │ 2621.25 │ 2625.75 │
- │ │ E - 4 │ 2632-2638 │ 2633.25 │ 2637.75 │
- ├─────────┼────────────┼───────────────┼──────────────┼───────────┤
- │ │ F - 1 │ 2602-2608 │ 2603.25 │ 2607.75 │
- │ F │ F - 2 │ 2614-2620 │ 2615.25 │ 2619.75 │
- │ │ F - 3 │ 2626-2632 │ 2627.25 │ 2631.75 │
- │ │ F - 4 │ 2638-2644 │ 2639.25 │ 2643.75 │
- └─────────┴────────────┴───────────────┴──────────────┴───────────┘
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- 4
- p5
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-
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- ┌─────────┬────────────┬───────────────┬──────────────┬───────────┐
- │ Channel │ Channel │ BAND WIDTH │ VISUAL │ AURAL │
- │ Group │ Number │ in Mhz. │ CARRIER │ CARRIER │
- ├─────────┼────────────┼───────────────┼──────────────┼───────────┤
- │ │ G - 1 │ 2644-2650 │ 2645.25 │ 2649.75 │
- │ G │ G - 2 │ 2656-2662 │ 2657.25 │ 2661.75 │
- │ │ G - 3 │ 2668-2674 │ 2669.25 │ 2673.75 │
- │ │ G - 4 │ 2680-2686 │ 2681.25 │ 2685.75 │
- ├─────────┼────────────┼───────────────┼──────────────┼───────────┤
- │ │ H - 1 │ 2650-2656 │ 2651.25 │ 2655.75 │
- │ H │ H - 2 │ 2662-2668 │ 2663.25 │ 2667.75 │
- │ │ H - 3 │ 2674-2680 ─┴─ 2675.25 ─┴─ 2679.75 │
- │ │ H - 4 │ * * * N O T A S S I G N E D * * * │
- └─────────┴────────────┴──────────────────────────────────────────┘
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- 5
- p6
-
-
- ┌────────────────────────────────────────┐
- │ What is the POWER and SIGNAL COVERAGE? │
- └────────────────────────────────────────┘
-
- MDS/MMDS use 10, 50 and now 100 Watt Transmitters. While the
- RANGE will vary, (the signal being restricted to Line of Sight),
- a 10 Watt Transmitter should have a radius of 15 to 20 miles.
-
- ┌─────────────────────────────┐
- │ What about signal security? │
- └─────────────────────────────┘
-
- There are many scrambling systems available.
-
- ┌──────────────────────────────┐
- │ How many channels can I use? │
- └──────────────────────────────┘
-
- This seems to be on a case by case method with the FCC. Some
- Systems have been granted operation of 31 channels.
- 6
- p7
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-
- ┌─────────────────────────────┐
- │ What Programming can I use? │
- └─────────────────────────────┘
-
- The programmers are now offering programming to Wireless Cable
- and you can fill 31 channels. These include Movies and Sports.
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- 7
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