例如,
data transmission 資料傳輸?就是指通話時的語音資料的傳輸嗎?
using a modulating subcarrier 使用調變次載波?又是什麼意思呢?
frequency modulation telephony 調頻式電話技術?只是指這台機器的通話技術是採用調頻方式嗎?
第一個符號的意義:First symbol - type of modulation of the main carrier
Frequency modulation F
第二個符號的意義:Second symbol - nature of signal(s) modulating the main carrier
A single channel containing quantized or digital information with the use of a modulating sub-carrier 2
A single channel containing analogue information 3
第三個符號的意義:Third symbol - type of information to be transmitted
Data transmission, telemetry, telecommand D
Telephony (including sound broadcasting) E