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目前内地各电视厂家生产的黑白电视机,都是适用于国内现行电视PL-D制式。这类机器在广东沿海城市,因不能接收港、澳电视节目而滞销,同时也影响向港澳地区出口。因为港澳电视制式为PAL-I制式。和PAL-D的区别见图示。参看二种制式区别,主要是伴音载频相对图象载频不同,PAL-D为6.5MHz,而PAL-I为6MHz。为了扩大国产黑白机的销售面及争取出口,有必要对上述二种能为一个人
At present, the black and white TV sets produced by various TV manufacturers in the Mainland are applicable to the current domestic television PL-D standard. Such machines in the coastal cities of Guangdong, because they can not receive Hong Kong and Macao television programs and slow sales, but also affect exports to Hong Kong and Macao. Because the television system in Hong Kong and Macao PAL-I format. The difference between PAL-D and the picture is shown. See the difference between the two systems, mainly sound carrier frequency relative to the image carrier frequency is different, PAL-D is 6.5MHz, and PAL-I is 6MHz. In order to expand the sales of domestic black and white machines and for export, it is necessary for the above two can be a person