Nautel VSHD Exciter, Инструкция по эксплуатации

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Page 2-8 VSHD Exciter Technical Instruction Manual
Issue 2.0 Section 2 Installation
2.3 TECHNICAL PRE-COMMISSIONING
2.3.1 Electrical Power Connection
The VSHD exciter operates from a 100 – 240 V ac, 50/60 Hz, single-phase power source.
The AC INPUT (U1) connector is located at the rear of the exciter (see Figure 2-8). Pass the
line cord through a ferrite toroid a minimum of two complete turns around the toroid. Ferrite
toroids (Nautel Part # LP23) and an ac line cord (Nautel Part # JN50) are included in the
Installation Kit (Nautel Part # 211-8982-01) with the VSHD exciter.
It is highly recommended that the ac power source for the exciter is taken from a suitably
rated uninterruptible power supply (UPS) with surge protection. This will ensure the exciter’s
continuous operation during short power outages and greatly reduce the risk of software
corruption and failures.
2.3.2 Safety Ground Point Connection
The VSHD exciter has a safety ground post (E1) on its rear panel (see Figure 2-8). The
ground post is a metric M5 thread. Connect the safety ground point of the VSHD exciter to
the station’s common point reference ground through a single isolated conductor. The
conductor should be a low-impedance copper conductor (minimum ¾” braid, 4-inch strap or 0
AWG wire).
NOTE
Do not connect the VSHD exciter’s ground point to the VS transmitter’s safety ground stud.
External equipment ground points should be avoided to reduce the risk of unwanted currents
and transients affecting the exciter. Refer to the ‘Recommendations for Transmitter Site
Preparation’ document supplied with all Nautel transmitters. This document outlines proper
site layouts and common point grounding.
2.3.3 Program Input Connections
The VSHD exciter accepts a variety of analog and digital program inputs. This paragraph
describes the requirements associated with the audio feeds to the exciter. All connections are
made at the rear of the exciter (see Figure 2-8). Where D-sub connectors are used as the
interface, Nautel provides the associated mating connector in the ancillary kit or installation kit
to facilitate customer connections.
Analog inputs
• Left and Right Inputs – see 2.3.3.1.1
• SCA Generator Input – see 2.3.3.1.2
• MPX Input – see 2.3.3.1.3
• MPX SCA/RDS Inputs – see 2.3.3.1.4
Digital Inputs
• AES/EBU Input – see 2.3.3.2.1
• RDS/RBDS Generator Input – see 2.3.3.2.2
• Carrier Frequency and Pilot Phase Control – see 2.3.3.2.3
Pilot Sample Output – see 2.3.3.3