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一九八○年军第五届军事电子学防御展览会在西德的威士巴顿举行。展览会由十月七日起至十月九日止,共进行了三天。参加展览的公司一共有二百多家,保密机有十几家公司展出,是所有展出品种较多的一类。其中很多是数字式保密机,包括单路话、群路话、电传、数据等保密机。展出的模拟信道的保密机品种也不少。 1、短波电台保密机超短波电台的中频带宽有25千赫,或50千赫可以通过数率为9.6-16千比特/秒的数字调制信号,各公司的超短波电台保密机在体制上都包括以下三部分:
The military’s Fifth Military Electronics Defense Exhibition was held in West Bussington in 1980. The exhibition will run from October 7 to October 9 for a total of three days. A total of more than 200 companies participating in the exhibition, security machine has more than a dozen companies on display, is all the more varieties of varieties. Many of them are digital security machines, including single-way, group road, telex, data and other security machines. Analog channels on display security machine varieties are also many. 1, the shortwave radio security machine UHF radio frequency bandwidth of 25 kHz, or 50 kHz can be digitally modulated signal of 9.6-16 kbit / s, the company’s FM radio security machine in the system includes the following three parts: