Please or Register to create posts and topics.

AM/FM Demodulator

The AM/FM Demodulator block demodulates the audio from a single or multiple broadcast channels e.g. from FM radio stations or AM aeronautical communication:

AM / FM Demodulator Block

The Monitor (Audio) can be switched between off (no audio), selected (single channel audio), voice (voice filtered single channel audio), or all (multiple channel audio decoding at the same time). You can switch between AM or FM demodulation. We have also added various features and adjustments e.g. volume, filter, noise reduction, stereo pilot tone masking etc.

You can also set a channel group for monitoring or add single or multiple channels (up to 1000 per group) within the histogram spectrum graph:

AM / FM Demodulator Settings

The following screenshot shows a recording from multiple radio broadcast stations in Doha. The AM/FM Demodulator block shows the recorded spectrum as a live histogram incl. all selected/placed channels and their width.

Those can be moved or deleted at any time. A frequency spectrum and waterfall display of the selected channel will be shown at the right hand side. In addition a timeline of each channel will be shown as soon as there is activity, otherwise the channel data will be greyed out.

An Audio Recorder block can be docked the to AM/FM Demodulator block to record all active channels and for selective playback later on.

AM / FM Demodulator Radio Stations Decoding Screenshot


AM/FM Demodulator Typical Missions:

AM / FM Demodulator Typical Missions

We just improoved the AM/FM Demodulator block with an optimized decoder buffering for low sample rates.

The AM/FM Demodulator now supports IQ data.

This makes the demodulation even clearer and more sensitive.

AM/FM Demodulator supports IQ data

We have added LSB & USB Demodulators:

LSB & USB Demodulator