Technical Instruction
Table Of Contents
- Nautel Limited
- MODULE EXCHANGE SERVICE
- 6.1 INTRODUCTION
- 6.2 WIRING LISTS NOT PROVIDED
- 6.3 PRINTED WIRING PATTERNS
- 6.4 WIRE COLOURS
- 5.5 WIRING LISTS PROVIDED
- 7.1 INTRODUCTION
- 7.2 COMPONENT VALUES
- 7.3 GRAPHIC SYMBOLS
- 7.4 LOGIC SYMBOLS
- 7.5 REFERENCE DESIGNATIONS
- 7.5.1 Types of Inputs/Outputs
- 7.5.2 Logic Level/Convention
- 7.7 IDENTIFICATION OF SCHEMATIC DIAGRAMS
Page 1-2 VSHD Exciter Technical Instruction Manual
Issue 2.0 Section 1 Overview
1.2 FACTORY SUPPORT
Nautel provides after sales factory support. Technical assistance is available on a 24 hour,
seven days a week basis. A factory service facility for repair of modules/assemblies is also
available. Refer to the Factory Support portion of the Warranty pages at the front of this
manual for additional information.
1.3 PURPOSE AND SCOPE OF MANUAL
This manual provides the information required to install, operate and maintain the exciter.
1.4 PURPOSE OF EQUIPMENT
The VSHD exciter is intended for use in conventional FM and/or HD Radio broadcasting
stations. Remote control facilities are incorporated to allow unattended operation from a
remotely located station studio.
1.5 MECHANICAL DESCRIPTION
The VSHD exciter is contained in a standard 19-inch rack mountable unit.
1.5.1 Dimensions
The VSHD exciter is an EIA standard rack mountable unit that measures 19 inches (483 mm)
wide, 3.5 inches (89 mm) high (2RU), and 22 inches (559 mm) deep. All VS transmitter
interconnections and user interface connections are made on the rear panel of the exciter.
1.5.2 Clearances
Ensure that the clearances at the front and the rear of the VSHD exciter’s host cabinet allow
sufficient room for easy installation and operation. Allow sufficient clearance on the sides of
the VSHD exciter for adequate ventilation.
CAUTION
Do not block the vents in the side of the VSHD exciter. This is especially important in higher
ambient temperature environments.
1.5.3 Weights
The VSHD exciter weighs approximately 19 lbs (8.6 kg).
1.6 COOLING REQUIREMENTS
The maximum chassis temperature of the VSHD exciter must not exceed 50°C (122°F). To
satisfy this requirement:
Do not allow the VSHD exciter’s room ambient air temperature to exceed 40°C
(104°F) at sea level. De-rate 3ºC (5.4ºF) per 500 m – or 2ºC (3.6ºF) per 1,000 feet –
above sea level.
Example:
At 1,600 m (1 mile) above sea level, the maximum ambient temperature should not
exceed 30.4°C (87°F). Cooler temperatures are recommended, in order to improve
the reliability of VSHD exciter.
If the VSHD exciter is used in high ambient temperature environments, make sure
that all of its ventilation holes are completely free of blockage.