汽车上的am按键指的是汽车收音机的波段。更多相关资料如下：汽车收音机一共有两种模式，一种是am，一种是fm，一般情况下车主在听收音机时，用fm按键比较多，因为fm是用来操作收音机的调频，am是用来调节收音机的波段。 汽车上am是收音机频段的表示。

A new modulation technique for AM broadcasting was demonstrated by industry pioneer Mike Dorrough at a recent meeting of SBE Chapter 43 in Sacramento. The Advanced Modulation System offers to increase ...

Belar Electronics has unveiled its latest innovations for analog and digital AM modulation, as the RF monitoring firm has completed its updates for its legacy AMMA-2. The company says this allows for ...

The average textbook definition of modulation reads: modulation is a process in which the frequency, phase or amplitude of a carrier wave varies in step with the instantaneous value of the modulating ...

Almost 102 years after ABC radio first hit the airwaves, Perth listeners will experience a major improvement in audio quality when the network's three AM stations move to FM in 2026.