788 Series Analog/IBOC Diplexer

788 Series High Efficiency FM Analog/IBOC Diplexer
ERI’s 788 High Power Power HD Radio FM Analog/IBOC Diplexer is modular in construction and designed to provide close channel combining for analog and digital FM broadcasting. ERI’s innovative All Pass design allows stations to operate digitally at powers up to -10dBc. This All Pass Diplexer maintains high efficiency while incurring a much smaller penalty to performance than other methods currently offered. As with all ERI products, the 788 Series use a temperature compensated design to allow the system to meet published specifications from cold start as well as normal operating conditions. All components in the RF path are copper or silver plated to maintain the lowest losses possible. The modules are designed to be oor mounted and is optionally available fully assembled within a mobile frame to ease installation.
Specifications
788 Series: Filter > Diplexer > All Pass
Band:	FM
Cooling Method:	Forced Air
Frequency Range:	88-108 MHz
Input Types:	3 1/8 inch 50 Ohm EIA \| 4 1/16 inch 50 Ohm EIA \| 6 1/8 inch 50 Ohm EIA
Output Types:	3 1/8 inch 50 Ohm EIA \| 4 1/16 inch 50 Ohm EIA \| 6 1/8 inch 50 Ohm EIA
Maximum Power Rating:	39 kW
Insertion Loss:	< 1.4 dB (Digital)
VSWR:	< 1.1:1
Group Delay:	< 350 ns (Analog) \| < 600 ns (Digital)
Analog Insertion Loss:	< 0.35 dB
Isolation, Digital to Analog:	> 40 dB
Notes: [1] 39 kW Analog, 5 kW Digital power handling. [2] Alternate configurations available. All designs, specifications, and availabilites presented in this publication are subject to change without notice.

Related Publications

788 Series High Efficiency FM Analog-IBOC Diplexer

788 Series High Efficiency FM Analog-IBOC Diplexer Brochure > Download File

Topics Include: Filters-Combiners

(Type: Brochure; Publication Number: 20120307001_AEN; Language Code: EN; Revision: 03)

High Level IBOC Combining Methods for Single Input Antenna Systems

Combining separate analog and HD Radio FM transmitters into a single antenna allows broadcasters to use existing equipment including transmitters, transmission line, and antennas; however, the options for accomplishing this are limited. A new method of high level analog/FM HD combining is discussed and compared to the other traditional methods. > Download File

Topics Include: Antennas Filters-Combiners

(Type: Whitepaper; Publication Number: 20121001001_BEN; Language Code: EN; Revision: 01)

788 Series

788

Model 788 All Pass FM Analog/IBOC diplexer. Includes cavities, 3 dB hybrids, and reject load. Convection cooled. Rated to 22 kW analog plus 3.0 kW digital power Specify operating frequency, and injection level, at time of order. Analog RF input 3-1/8-inch EIA male, digital RF input 1-5/8-inch EIA male, and RF output 3-1/8-inch EIA, male.

788A

Model 788A All Pass FM Analog/IBOC diplexer. Includes cavities, 3 dB hybrids, and reject load. Forced air cooled. Rated to 36 kW analog plus 5 kW digital power Specify operating frequency, and injection level, at time of order. Analog RF input 3-1/8-inch EIA male, digital RF input 1-5/8-inch EIA male, and RF output 3-1/8-inch EIA, male.

788B

Model 788B All Pass FM Analog/IBOC diplexer. Includes cavities, 3 dB hybrids, and reject load. Forced air cooled. Rated to 49 kW analog plus 7 kW digital power. Specify operating frequency, and injection level, at time of order. Analog RF input 6-1/8-inch EIA male, digital RF input 3-1/8-inch EIA male, and RF output 6-1/8-inch EIA, male.

788 Series Services and Accessories

RST-004

One ERI Technician for setup and commissioning of 788 All Pass FM Analog/IBOC Diplexer. Also includes written FCC mask compliance report, following completion of services.

All designs, specifications, and availabilities of products and services presented in this publication are subject to change without notice.

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