FM Filters-Combiners

ERI offers a broad range of FM Bandpass Filters with power handling capabilities from 1.5 kW to 35 kW. These filters can be used as single station filtering for suppression of undesirable intermodulation products or can be configured as FM channel combiners to combine multiple FM signals into a common broadband FM antenna.

ERI Constant Impedance FM Channel Combiner Modules are available in a wide range of models that can be configured into large system to combine multiple FM radio stations into one master FM antenna. ERI produces constant impedance FM combiner modules that handle individual input power levels from one kW to 70 kW. The combined power output capacity up to 250 kW can be accommodated.

ERI offers two models of FM Notch Filters the Model 785 and the Model 786. Both models are available as single cavities or the can be combined to provide high levels of rejection for a single FM channel or be set up to reject multiple frequencies. These offer a low cost and low loss option to FM bandpass filters for spurious emissions protection.

As an alternative to tradition FM "Tee" Chanel Combiners ERI offer two models of Integrated FM Channel Combiners. These are compact and economical alternatives to tradition reflective channel combiners. The FI136 is a low power junction combiner that con combine two FM signals each with transmitter power outputs of less than 750 watts and channel spacing of at 1.6 MHz. The FI836 high power FM channel combiner can combine two FM signals with a channel spacing of 1.8 MHz or more and individual transmitter power outputs of up to 30 kW.

ERI offers a wide assortment of FM system accessory equipment which include patch panel/power dividers for high power Master FM Antenna combiner Systems. The company also manufactures switching and switchless combiner systems to combine two more FM transmitters for higher power requirements. ERI also provides custom patch panel and switching systems for a wide range of requirements. As well as cabinet power combiners.

ERI offers a wide array of diplexers and circulators to combine analog and HD Radio digital FM signals. These products include 10 dB Hybrid Injectors, Reverse Fed Constant Impedance FM Channel Combiners, and the patented 788 High Efficiency Diplexer. HD Radio is a trademark of Xperi.

ERI offers three (3) models of FM Low Pass Harmonic Filters to cover power handling requirements from 10 kW to 44 kW. These are all compact design with excellent rejection through the 10th Harmonic.