有线电视基本知识

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1、有线电视基本知识（一）一、电视频道频率的划分中国的有线电视频率分配范围从48．5mhz到958mhz，其中每8mhz占一个频道。除去88mhz到108mhz（5、6频道间）为调频广播信号，223MHz～470MHz（12、13频道间）用于其它领域外，其余共分了68个频道。我国电视频道划分表波段频道频率范围图象载频伴音载频本机振荡I波段(米波)DS—12348.6～56.556.5～64.564.5～72.549.7557.7565.7556.2564.2572.2586.7594.75102.75II波段(米波)4576～8484～927

2、7.2585.2583.7591.75114.25122.25III波段(米波)6789101112167～175175～183183～191191～199199～207207～215215～223168.25176.25184.25192.25200.25208.25216.25174.75182.75190.75198.75206.75214.75222.75205.25213.25221.25229.25237.25245.25253.25IV波段(分米波)DS—131415161718470～478478～486486～49449

3、4～502502～510510～518471.25479.25487.25495.25503.25511.25477.75485.75493.75501.75509.75517.75508.25516.25524.25532.25540.25548.25192021222324518～526526～534534～542542～550550～558558～566519.25527.25525.25543.25551.25559.25525.75533.75541.75549.75557.75565.75556.25564.25572.255

4、80.25588.25596.25V波段(分米波)252627282930313233343536373839404142606～614614～622622～631631～638638～646646～654654～662662～670670～678678～686686～694694～702702～710710～718718～726726～734734～742742～750607.25615.25623.25631.25639.25647.25655.25663.25671.25679.25687.25695.25703.25711.257

5、19.25727.25735.25743.25613.75621.75629.75637.75645.75653.75661.75669.75677.5685.75693.75701.75709.75717.75725.75733.75741.75749.75644.25652.25660.25668.25676.25684.25692.25700.25708.25716.25724.25732.25740.25748.25756.25764.25772.25780.25V波段(分米波)DS—43444546474849505152535

6、45556575859606162636465750～758758～766766～774774～782782～790790～798798～806806～814814～822822～830830～838838～846846～854854～862862～870870～878878～886886～894894～902902～910910～918918～926926～934751.25759.25767.25775.25783.25791.25799.25807.25715.25823.25831.25839.25847.25855.25863.

7、25871.25879.25887.25895.25903.25911.25919.25927.25757.75765.75773.75781.75789.75797.75805.75813.75821.75829.75837.75845.75853.75861.75869.75877.75885.75893.75901.75909.75917.75925.75933.75788.25796.25804.25812.25820.25828.25836.25844.25852.25860.25868.25876.25884.25892.25

8、900.25908.25916.25924.25932.25940.25948.25956.25964.25666768934～942942～950950～958935.25943.25951