C4FM - What does C4FM stand for? The Free Dictionary
References in periodicals archive
The new capabilities also support the analysis of C4FM
modulation as used in Project 25, an industry standard for the manufacturing of interoperable digital two-way wireless communications products, created to improve radio spectrum efficiency.
01 PPM), C4FM
(APCO 25) modulation and C4FM
modulation error vector meter.
The 2975 quickly tests the transmitter performance of the radio in less than 20 seconds with quick visual indicators of power, frequency error and C4FM
Error Vector Magnitude.