ERI FM filters and combiners have served the broadcast industry for over 40 years. The basic building block of ERI’s combiner and multiplexers system is a unique filter cavity. Only ERI offers a cylindrical cavity and all internal components in the RF path are silver plated. The result is an extremely efficient (low loss) and stable filter. ERI filters include a unique bellows temperature compensation assembly which maintains filter performance from a cold start to normal operating temperature without causing high transmitter VSWR. Only ERI filters incorporate a loop coupled design that allows more control over the filter pass band and offers performance superior to what can be achieved with the iris coupled cavities used by other manufacturers. ERI’s 780/783 constant impedance combiner module is modular in construction and is designed so that additional stations may be added in the future. The frequency of the additional station may be located anywhere within the FM broadcast band 0.8 MHz or more from any other system frequency.
To further enhance system reliability ERI FM filter systems do not include air filters that require replacement. In filter system designed to handle higher FM power levels the forced air cooling option uses a high reliability motorized fans that are mounted on each cavity and requires no additional floor space and does not require filtering. These band pass filters sets are available for protection from undesirable intermodulation products. They can also be configured to combine multiple FM channels in branch or constant impedance configurations.
Notes: (1) VSWR when terminated in 50-Ohm resistive load. (2) Loss values will be somewhat greater for frequency separations 2.0 MHz or less. (3) Group delay correction required for frequency separations 0.8 MHz or less and recommended for frequency separations of 2.0 MHz. or less. (4) 800 kHz or more removed from any signal appearing at the broad port. (5) Specifications presented are typical, total system performance may vary. In a continuing effort to improve products, ERI reserves the right to change specifications and features. (6) Dimensions do not include optional group delay compensation
All designs, specifications, and availabilites presented in this publication are subject to change without notice.
780/783 CIC Series Constant Impedance Combiners
Brochure and specifications for 780/783 CIC Series Constant Impedance Combiners
(Type: Brochure; Publication Number: 20110310003_AEN; Language Code: EN; Revision: 01)
All designs, specifications, and availabilities of products and services presented in this publication are subject to change without notice.