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By Newglee Technical Team | Next-Gen FM Broadcasting
For decades, the FM band (87-108 MHz) has been the gold standard for local broadcasting. But in a digital world, analog FM is reaching its limits—susceptible to multipath interference and lacking the data capabilities of modern streaming.
The solution isn't necessarily moving to a new band like DAB+; it's about digitizing the band you already own. Introducing the Newglee NGA-201F, a specialized DRM FM Modulator designed to deploy DRM Mode E signals, delivering crystal-clear digital audio and multimedia services directly within the existing FM spectrum.
While standard DRM30 covers AM bands, the NGA-201F is engineered specifically for Band II. It allows broadcasters to transmit up to 186 kbps of data within a narrow 100 kHz bandwidth—half the spectrum usage of a standard analog FM signal.
Spectrum Efficiency: With a 100 kHz bandwidth, you can slot a digital signal alongside your analog transmission or fit multiple digital channels into unused guard bands.
CD-Quality Audio: Leveraging USAC codecs (via the encoder) and the NGA-201F's precise 16QAM modulation, listeners receive artifact-free, studio-quality sound.
Multimedia Ready: It supports simultaneous transmission of album art, scrolling text, and Traffic Message Channel (TMC) data.
Generating a digital signal in the VHF band requires exceptional linearity. The NGA-201F is built to ensure your transmission meets strict emission masks, protecting adjacent channels from interference.
· Advanced Digital Pre-Distortion (DPD): The NGA-201F actively corrects non-linearities from your power amplifier. This results in an optimized Modulation Error Ratio (MER > 50 dB) and keeps spectral regrowth (ACPR) below -60 dBc.
·Direct Digital Synthesis: By generating frequencies directly in the 87–108 MHz range, it minimizes conversion loss and maximizes signal purity.
The NGA-201F is designed to fit seamlessly into existing transmitter sites, whether for Single Frequency Networks (SFN) or local coverage.
· Input Versatility: Accepts dual MDI/DCP streams over Ethernet, ensuring redundancy for critical 24/7 operations.
·Synchronization: Integrated GPS (1PPS) and 10MHz inputs guarantee the microsecond-level timing accuracy required for SFN operation.
·Remote Control: A comprehensive Web GUI and SNMP support mean your engineers can monitor modulation health and adjust power output from anywhere.
Don't let your FM frequency remain stuck in the analog era. The Newglee NGA-201F offers a cost-effective, high-performance path to digitization, allowing you to compete with streaming services while retaining the robustness of terrestrial radio.
