ERI FM Band Pass Filters

Size: px

Start display at page:

Download "ERI FM Band Pass Filters"

Drusilla Shaw
5 years ago
Views:

ERI 780-3 FM Band Pass Filters Features Cylindrical construction provides better mechanical and electrical stability than square or rectangular cavities Factory tuned to customer s specified channel,

1 ERI FM Band Pass Filters Features Cylindrical construction provides better mechanical and electrical stability than square or rectangular cavities Factory tuned to customer s specified channel, yet can be easily field converted to any FM channel Minor adjustments of cavity resonant frequency can be made during full power operation of filters High stability temperature compensated cavities ERI filters are loop coupled and fixed with bolted connections to couple cavities No Teflon or other insulating material used in the coupling between cavities, eliminating a primary point of failure, present in ERI Model Three (3) Section FM Band Pass Filter competitor s designs. shown with optional forced air cooling. Loop coupling provides an adjustment (without disassembly) at the input and output of each cavity Marman clamp connection allows close cavity placement Ability to change frequency quickly and with a minimum of disassembly Filter can be easily broken down for shipment and placement Temperature indicator provided on all filter sets Optional non-adjacent coupling and group delay compensation available Easily assembled floor standing units (hardware for ceiling suspension available on request) 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. 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. Electronics Research, Inc Gardner Road Chandler, IN USA (tel) (fax) Your Single Source for Broadcast Solutions Call Toll-free at 877 ERI-LINE Visit Online at

2 780-3 Series FM Band Pass Filter Specifications: Model: Filter Type: FM Band Pass Frequency: All FM Broadcast Channels (88 to 108MHz) Pass Band: ±150 khz Minimum Channel Spacing: 2.0 MHz Poles: Three (3) section Insertion Loss: 0.3 db Group Delay Variation: <75ns Overall Variation, Carrier ± 150kHz Frequency Bandwidth to -30 db Limit: fo ±1.5 MHz VSWR 1 : 1.1:1 ±150 khz, maximum Input and Output Connector: 1-5/8-inch or 3-1/8-inch EIA flange Power Handling Capability: 5 kw with convection cooled 10 kw with forced air cooling 1) When terminated in 50-Ohm resistive load. Band Pass Filter Size and Convection cooled model: Height: in 1219 mm Width: in 381 mm Length: in 1645 mm 186 lbm 84 kg Forced air cooled model: Height: in 1359 mm Width: in 381 mm Length: in 1645 mm 210 lbm 95 kg AC power required for forced air cooling: 115 VAC 2 amps 1) When terminated in 50-Ohm resistive load. 2) 2.0 MHz or from any adjacent port signal frequency. 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.

Model: 783-3 Height: 48.00 in 1219 mm Width: 15.00 in 38 mm Length: 64.

3 Model: Height: in 1219 mm Width: in 38 mm Length: in 164 mm 186 lbm 84 kg ERI Series Band Pass Filter Module, convection cooled.

4 Model: 783-3A Height: in 1359 mm Width: in 38 mm Length: in 164 mm 210 lbm 95 kg Power requirement for each fan 0.5 amps at 115 VAC. (0.25 amps with 240 VAC service) ERI Series Band Pass Filter Module, with Optional Forced Air-Cooling

689 lbm 312.53 kg 79-inches 200.66-cm 98-inches 248.92-cm 48-inches 121.

5 689 lbm kg 79-inches cm 98-inches cm 48-inches cm ERI 780-6/3 (TB80-6/3) Series TEE Combiner, convection cooled ( L Configuration)

749 lbm 339.74 kg 79-inches 200.66-cm 98-inches 248.92-cm 56-inches 142.24-cm Power requirement for each fan 0.5 amps at 115 VAC.

6 749 lbm kg 79-inches cm 98-inches cm 56-inches cm Power requirement for each fan 0.5 amps at 115 VAC. (0.25 amps with 240 VAC service) ERI 780-6/3 (TB80-6/3) Series TEE Combiner with optional forced air cooling ( L Configuration)

689 lbm 312.53 kg 160-inches 406.40-cm 19.50-inches 49.53-cm 48-inches 121.

7 689 lbm kg 160-inches cm inches cm 48-inches cm ERI 780-6/3 (TB80-6/3) Series TEE Combiner, convection cooled ( In-Line Configuration)

8 749 lbm kg 160-inches cm 19.5-inches cm 56-inches cm Power requirement for each fan 0.5 amps at 115 VAC. (0.25 amps with 240 VAC service) ERI 780-6/3 (TB80-6/3) Series TEE Combiner with optional forced air cooling ( In-Line Configuration)

689 lbm 312.53 kg 70-inches 177.80-cm 40-inches 101.60-cm 48.00-inches 121.

9 689 lbm kg 70-inches cm 40-inches cm inches cm ERI 780-6/3 (TB80-6/3) Series TEE Combiner, convection cooled ( U Configuration)

10 749 lbm kg 70-inches cm 40-inches cm 56-inches cm Power requirement for each fan 0.5 amps at 115 VAC. (0.25 amps with 240 VAC service) ERI 780-6/3 (TB80-6/3) Series TEE Combiner with optional forced air cooling ( U Configuration)

780-8 Series Constant Impedance FM Combiners

780-8 Series Constant Impedance FM Combiners Features Cylindrical construction provides better mechanical and electrical stability than square or rectangular cavities Factory tuned to customer s specified channel, yet can be easily field converted