Advanced Qualification · A-005 Transmitters, modulation and processing · A-005-007-011
La commande automatique de niveau ("ALC") est un autre nom pour désigner :
- AL'écrêtage RF
- BL'écrêtage AF
- CLa compression RF
- DLa compression AF
Correct answer: C — La compression RF. Question tirée de la banque officielle d'ISDE.
Why
Automatic Level Control, or ALC, is essentially RF compression because it reduces the strength of the radio frequency signal when it gets too loud, preventing the transmitter from overdriving and distorting the output. The full explanation — and one for every question — is in Pro.
Practise this section
Transmitters, modulation and processing is section A-005 of the Advanced exam: Transmitters, modulation and processing: AM, FM, SSB, keying, speech processing, and the numbers behind occupied bandwidth.
Drill A-005 — free, no account