TF.457-1 标准频率和时间信号业务修正的朱立叶日期的..[1974/07] The CCIR,
CONSIDERING
(a) that for dating purposes a decimal day count is desirable in connection with the use of radio time signals and radio time codes;
(b) that a decimal day c..
2185.
TF.374-3 标准频率和时间信号发射[1974/07] The CCIR,
CONSIDERING
(a) that the World Administrative Radio Conference, Geneva, 1979, allocated the frequencies 20 kHz ± 0.05 kHz, 2.5 MHz ± 5 kHz (2.5 MHz ± 2 kHz in Region ..
F.480 高频无线电话电路的半自动运行。通过无线电..[1974/07] The CCIR,
CONSIDERING
(a) that telephone circuit operation is substantially improved by the use of semi-automatic instead of manual working;
(b) that HF radiotelephone circuits wi..
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