The Optimod-FM 5518

Optimod-FM 5518: Overview

OPTIMOD-FM 5518 is a new superb stand-alone stereo encoder combining look-ahead and band-limited clipping techniques to control STL-induced overshoots while minimizing artifacts. The 5518 is the ideal choice for network broadcasters who process with an FM audio processor at the network origination point and who need a processor at every transmitter to eliminate network STL overshoots. The built-in, defeatable ITU BS412 multiplex power controller acts on all outputs to meet even the most stringent European government regulations include a full spectral protection of subcarriers and RDS/RBDS regardless of the amount of composite limiting. A 10 MHz frequency reference input allows the stereo pilot tone frequency to be locked to GPS or another high-accuracy frequency standard. This improves the performance of single-frequency networks in areas where coverage of the transmitters overlaps. The availability of analog and digital inputs, two composite outputs with independent level controls and two subcarrier inputs (one of which can be repurposed to emit a 19 kHz pilot reference output for RDS/RBDS generators)permit hassle-free interfacing in any FM transmitter plant.

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