940 Series Constant Impedance FM Combiner Module
A new compact constant impedance FM bandpass filter from ERI with an innovative form factor and construction to provide the smallest footprint FM bandpass filter available capable of handling up to 10 kW average power. The filter is a four-section single cabinet design with a footprint of less than 21 by 42 inches (533 by 1067 millimeters). The filter includes the same field-proven Invar and bellows temperature compensation used in all models of ERI’s medium and high-power FM filter products. The filter contains a cross-coupling standard for additional isolation in combiner systems with closely spaced frequencies. The filter is rated to handle up to 6 kW (depending on tuning) at the output after insertion losses, convection cooled, and the rating is increased to 10 kW with a forced air-cooling fan.
Features
- Includes cross-coupling for higher rejection for use in applications with closely spaced frequencies
- Folded design for minimum footprint
- ERI's Bellows Temperature-Compensation Technology, temperature stable using Invar
- Rugged 3/16-inch thick aluminum construction eliminates the oil-can effect from heating
- 1-5/8-inch EIA Flanged or Unflanged Input connection
- 1-5/8-inch or 3-1/8-inch Wideband Input and Output connections
- The filter can be tuned to different bandwidths based on the need
- Factory tuned to customer's specified channel yet can be easily field converted to any FM channel
- Ability to change frequency quickly and with a minimum of disassembly
- Easily assembled floor-standing unit (hardware for ceiling suspension available on request)
