設備の維持費、AMはFMの約50倍 AM（Amplitude Modulation）ラジオ放送は「中波放送」とも呼ばれ、日本では526.5〜1606.5 kHzという周波数を使用しています。AMの特徴は、電波が遠くまで届くということ。電波は山々を回り込んで伝わるため、ラジオ事業者は出力の ...

While fewer and fewer people are listening to FM radio today, it was hot stuff amid its widespread rollout during the late 1930s and early 40s. Short for frequency modulation, FM’s appeal compared to ...

The author is vice president of business development for Orban Labs. We all know that engineers have way too much on their plates and may not always have the time to check things thoroughly, ...

/ c ± n.m / for n = 0, 1, 2, 3, .... where n is the sideband pair number In this expression, the + indicates the upper sidebands, and the - indicates lower ones ...

A new modulation technique for AM broadcasting is being touted by industry pioneer Mike Dorrough. He says the Advanced Modulation System can increase carrier modulation to 200%, improving the ...