Belar Expands Automated Channel Scanning Capability for FM and HD Radio

New software upgrade to flagship modulation monitors support scanning of up to six analog or digital channels from a single unit

West Chester, PA, March 7, 2016 Belar Electronics has been at the forefront of innovation for HD Diversity Delay, continuously updating its Automatic Delay Correction software (ADC) in the FMHD-1 modulation monitor to time-align analog and digital program signals. At the 2016 NAB Show (April 18-21, Las Vegas Convention Center), Belar is extending one of its more recent innovations, Automated Channel Scanning, to its FCMS-1 all-in-one monitor for multi-station FM or FM/HD monitoring. Belar will demonstrate the application on both monitors at Booth C3730.

Automated Channel Scanning was created based on a need to simplify on-air compliance and quality monitoring in consolidated RF facilities. The automatic scan function cycles through up to six presets, making it perfect for networks operating multiple stations in a single market. In an HD Radio-specific application, the FMHD-1 establishes direct IP connections to each station’s specific delay device—an exporter, audio processor or separate delay line—and applies the appropriate timing corrections on a sequential basis.


The extension of this software function to the FMCS-1 brings tremendous value to broadcasters who want to monitor multiple FM signals, or a mix of FM and HD Radio signals. Belar’s software-defined architecture allows existing FMCS-1 customers to incorporate Automated Channel Scanning in the field.

“Whether monitoring FM, HD or a hybrid across several stations, Automated Channel Scanning removes the need for separate units for each station, simplifying how engineers can receive, review and react to signal compliance and performance readings,” said Mark Grant, CEO, Belar Electronics. “It is another way Belar is at once reducing multiple station costs while delivering more benefits to the broadcaster.”

In addition to Automated Channel Scanning, Belar will demonstrate the following ADC software applications that have been introduced since the 2015 NAB Show:

  • Time Window Expansion: This advanced signal correction expands the time window by up to eight times, and leverages an “auto range mode” to track the delay and open the correction window if the delay drifts outside the allotted range. Sample resolutions are automatically increased or decreased to pull the delay back within the window.
  • Delay Ramping: A gradual ramping feature for broadcasters correcting HD Diversity Delay with an audio processor. This application drives smoother transitions between time adjustments, eliminating the perceptible jump that listeners experience as the broadcast shifts between analog and HD.

Belar’s ADC software uniquely feeds HD Diversity Delay adjustments toward the front of the air chain by establishing an IP connection to the audio processor or exporter. The FMHD-1 measures the delay error and communicates the necessary corrections to the delay device. That communication is locked into in a continuous loop, ensuring that the appropriate time delay is constant and consistent. ADC software continues to integrate with the largest number of professional devices on the market, including GatesAir, Nautel and Broadcast Electronics exporters; Omnia, Orban and Wheatstone audio processors; and 25-seven delay lines.

About Belar Electronics

Founded in 1964, Belar Electronics Laboratory, Inc. is the world’s leading manufacturer of modulation monitors. Used by radio and TV stations globally to monitor broadcast signals, Belar products are world-renowned for accuracy and reliability. These benefits are also recognized worldwide by manufacturers of transmitters and audio processors, which regularly rely on Belar monitors as test instruments to ensure their products meet specifications.  Contact Belar at (610)-687-5550 or visit them on the web at

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