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An Introduction to FM MPX
http://www.smoke.com.au/~ic/mpx.html#:~:text=The%20MPX%20stereo%20signal%20consists%20three%20parts.%20The,the%20Stereo%2FMono%20Switch%20on%20an%20amplifier%20to%20%22Mono%27.
An Introduction to FM MPX
http://www.smoke.com.au/~ic/mpx.html
The MPX stereo signal consists three parts. The first is a normal audio signal made up of the Sum of the left and right channels. This is the signal you hear on a Mono radio and is the same as switching the Stereo/Mono Switch on an amplifier to "Mono'. In addition a difference signal (Left - Right) is generated and then used to modulate a 38 Khz subcarrier using Double sideband …
Stream your composite MPX signal to your FM tower | …
https://www.digigram.com/solutions/stream-composite-mpx-signal-fm-tower/
Stream your composite MPX signal to your FM tower The challenge You are a tower company or a radio broadcaster. Currently you use several pieces of equipment on each transmitter site to create the MPX signal from the baseband audio (e.g. RDS encoder, stereo generator etc.). Today the baseband audio signal is transported over IP.
MPX over AES - Nautel Broadcast
https://www.nautel.com/products/innovations/audio/mpx-over-aes/
MPX over AES generates the FM-Stereo MPX signal inside the audio processor, and scales the sampling rate to 192kHz. Through recent firmware developments, the AES/EBU transom can accommodate a sampling rate at 192kHz, making it possible to transport the MPX signal directly from the audio processor to the input of the exciter…MPX over AES.
AES @192kHz - digital Composite/MPX over IP
https://ccbe.ca/wp-content/uploads/2020/01/WorldCast-APT-MPXoIP_What_Why_How_2019.pdf
For the composite/MPX signal a spectrum bandwidth of theoretically 100kHz is specified. In most continents the range above the RDS signal is not used. For these cases, the APT composite/MPX codecs offer a low pass function which limits the spectrum to 64kHz.
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