BDI LPF-100 Composite Low Pass Filter

Composite Low Pass Filtering for Professional FM Broadcast Applications

The Broadcast Devices LPF-100 is a high-performance composite low pass filter engineered for FM broadcast facilities that demand precision noise reduction without sacrificing stereo quality. Designed for modern baseband stereo audio systems, the LPF-100 effectively reduces unwanted high-frequency noise and artifacts, providing a cleaner, more accurate signal. Its advanced filtering design ensures compatibility with any stereo generator output, making it an essential tool for stations aiming to maintain the highest audio quality standards.

Advanced Noise Reduction for Clearer Signal Transmission

With the LPF-100 in place, FM broadcast engineers can address common noise issues caused by aggressive audio processing, noisy studio-to-transmitter links (STLs), and stereo generator spurious tones. The filter delivers at least 15 dB of noise reduction at 67 kHz and more than 30 dB of attenuation at 100 kHz, ensuring that unwanted signals are effectively suppressed before reaching the transmitter. This targeted noise control improves overall broadcast clarity and reduces interference.

Linear Phase Tenth-Order Filter Design for Precision Performance

At the heart of the LPF-100 is a tenth-order linear phase filter design that preserves stereo imaging and frequency response while removing problem frequencies. This engineering approach ensures that the unit achieves maximum attenuation at problem frequencies without distorting or degrading the stereo program material. The result is a transparent filtering process that retains the integrity of the audio signal.

Multiple Output Options for Flexible System Integration

The LPF-100 accepts a 3.5 VPP baseband audio input and provides three level-controlled, isolated filtered outputs, each delivering a nominal 3.5 VPP signal. These outputs make it possible to feed multiple downstream devices without introducing ground loops or signal degradation. This flexibility makes the LPF-100 ideal for integration into both new and existing broadcast transmission chains.

Reliable Performance in Demanding Broadcast Environments

Built to meet the needs of professional FM facilities, the LPF-100 features rugged construction and dependable componentry designed for continuous operation. Whether in a primary on-air chain or as part of a redundancy system, this unit delivers consistent performance, helping broadcasters maintain compliance with signal quality standards and ensuring an exceptional listening experience for audiences.