Page 3 - JVCKenwood 2015 NEXEDGE Catalog

Intelligibility
NEXEDGE® uses the AMBE+2TM VOCODER, a state-of-the-art voice digitalization and compression technology offering enhanced Forward Error Correction (FEC) and noise reduction for superior clarity at varying signal strengths in all digital call features.
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Advanced Digital Processing
A key element of the NXDN® air interface is the AMBE+2TM vocoder which digitizes speech while retaining natural voice nuances, performs noise reduction, introduces FEC and compresses voice data to accommodate land mobile radio spectrum bandwidth and data rates. Next, the radio's digital signal processor (DSP) protocol packages the vocoder, signaling, control, and FEC data together, converting it to a uniquely filtered 4-Level FSK digital waveform that modulates the transmitter. This results in a low bit-error-rate (BER) digital air interface so you get robust communications even in weak signal strength areas.
Superior Clarity in Extended Coverage
As RF signal strength weakens with distance, analog reception becomes increasingly noisy and intermittent. NXDN®’s low BER improves reception in fringe areas, thereby “effectively” increasing coverage as much as twenty percent over analog.
Digital Call Features
All NEXEDGE® units support common call features in both digital conventional and trunked modes.
• All Group Call A selectable All Call Group ID (GID) calls all talk groups on the system for facility wide announcements, emergencies and critical incidents.
• Paging Call Up to five UID unit-to-unit pages are dated, time stamped and stored for recall and review. This is useful for unattended radio messages and
non-voice selective paging operations.
• Emergency Call Subscriber units can declare an Emergency to a console, an
individual, a group or all groups. This signal can be triggered by manual key, a footswitch (mobiles) or Man-Down Switch (portables).
Digital VOCODER
Coverage differences in fringe areas
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