Nautel VSHD Exciter, Инструкция по эксплуатации

Страница: 28 / 79

Page 2-12 VSHD Exciter Technical Instruction Manual
Issue 2.0 Section 2 Installation
2.3.3.2 DIGITAL INPUTS
The digital exciter accepts the following digital inputs:
2.3.3.2.1 AES/EBU Input
The VSHD exciter accepts AES/EBU digital audio via the AES/EBU IN 1 3-pin XLR
connector (A1J4 ) (110 Ω balanced; supports sample rates between 20 kHz and 192 kHz).
The associated VS transmitter’s front panel or remote AUI allows for configuration of the
audio input mode (left, right or stereo) and level (in dBFS).
A second AES/EBU option exists for use with a secondary digital audio source (e.g. Internet
Playlist). This input is provided on the ANALOG AUDIO IN D-sub connector (A1J5; + on
pin 1, - on pin 2, shield on pin 9). This input must be connected to the associated VS
transmitter AES out on the REMOTE I/O-A D-sub connector (A1J2A; + on pin 12, - on pin 24,
shield on pin 13). Nautel provides a cable (W2) in the Installation Kit (Nautel Part #
211-8982-01) with the VSHD exciter, if necessary. Both ends of this cable contain solder cup
D-sub connectors, which allows the customer to install any additional wiring on the VSHD
exciter’s ANALOG AUDIO IN connector or associated VS transmitter’s REMOTE I/O-A
connector to accommodate other possible audio sources and transmitter remote controls.
NOTE
Refer to the associated VS transmitter’s Operations and Maintenance Manual for more
information on the Audio Player feature and its configuration.
2.3.3.2.2 RDS/RBDS Generator Input
The VSHD exciter accepts ASCII or UECP data for its internal RDS/RBDS generator via
RS-232 on the RDS/RBDS D-sub connector (A1J3A). The data is framed and modulated on
a 57 kHz sub-carrier, which forms part of the composite signal.
NOTE
The VSHD also supports stand-alone RDS/RBDS operation. In this mode, RDS/RBDS
parameters are configured through the VS transmitter’s AUI.
2.3.3.2.3 Carrier Frequency and Pilot Phase Control
The VSHD exciter provides carrier frequency and pilot phase control from a precision GPS
reference on the 10 MHz IN BNC connector (W5J1) (between 0.5 V and 2 V pk-pk sine wave
input; 50 Ω) and 1PPS IN BNC connector (A1J8A) (5 V TTL input level, 10 kΩ).
2.3.3.3 PILOT SAMPLE OUTPUT
The VSHD exciter provides a 19 kHz pilot sample (500 mV pk-pk) on the PILOT/MPX
SAMPLE OUT BNC connector (A1J8B).