Nautel VSHD Exciter, Инструкция по эксплуатации

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VSHD Exciter Technical Instruction Manual
Page 1-1
Section 1 Overview Issue 2.0
VSHD Exciter
TECHNICAL INSTRUCTION MANUAL
Section 1 OVERVIEW
1.1 INTRODUCTION
The VSHD exciter (see Figure 1-1) provides a high quality VHF, frequency modulated, RF
signal, designed to integrate with a VS series transmitter for IBOC transmission in either all-
digital or hybrid modes. The VSHD exciter is frequency agile, requires no tuning for operation
between 87.5 MHz and 108 MHz, and is capable of operation up to 50 W (in analog mode).
Using 'direct-to-channel' conversion of the audio, the VSHD exciter provides superior signal
reproduction and eliminates problems related to aging, microphonics, and filtering. Audio
source options include AES/EBU (XLR), analog L/R, two modulated SCA inputs, two
unmodulated SCA inputs, RBDS/RDS generator, and composite (balanced or unbalanced).
The VSHD also accepts an internet playlist as a backup audio stream from the VS transmitter
via a secondary AES/EBU input and provided cable.
The VSHD exciter has no user interface. It is controlled, locally or remotely, via the
associated VS series transmitter’s front panel display or remote AUI. Operation of additional
menu screens and selection options that are not included in the VS transmitter’s technical
documentation are covered in this manual.
The VSHD exciter can be purchased and shipped with a VS series transmitter or provided as
an HD upgrade. In the case of an upgrade, Nautel provides the Exgine hardware and DTS
(formerly iBiquity Digital Radio) software required to broadcast your signal in HD.
Refer to Section 6 of this manual for electrical schematics of the VSHD exciter and VS
transmitters that outline the electrical differences when configured for HD operation.
Figure 1-1: VSHD Exciter