Nautel XR12 User manual

Document: XR12-PREINST
Issue: 0.17 2005-08-31
Status: Preliminary
XR12 Transmitter
Pre-installation Manual

Nautel Limited
10089 Peggy’s Cove Road
Hackett’s Cove, NS Canada B3Z 3J4
Phone: [phone]
Fax: [phone]
Nautel Maine Inc.
201 Target Industrial Circle
Bangor, Maine USA 04401
Phone: [phone]
Fax: [phone]
Email: suppor[email protected]
Web: www.nautel.com
The comparisons and other information provided in this document have
been prepared in good faith based on publicly available information. The
reader is encouraged to consult the respective manufacturer's most recent
published data for verification.
© Copyright 2005 NAUTEL. All rights reserved.

XR12 Transmitter Pre-installation Manual Table of contents
Page i
Contents
About this manual v
About safety vii
Description 1-1
Capabilities 1-1
Options 1-2
Pre-installation tasks 2-1
Preparing for installation 2-1
Selecting a location for the transmitter 2-3
Installing an antenna feedline 2-3
Physical requirements 3-1
Dimensions 3-1
Clearances 3-2
Weight 3-8
Cooling requirements 4-1
Air flow in the transmitter 4-1
Cooling 4-3
Heating 4-4
Electrical requirements 5-1
Electrical power 5-1
Station reference ground 5-4

XR12 Transmitter Pre-installation Manual
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Control and monitoring 6-1
Controls 6-1
Alarms 6-1
Remote control circuits and alarms 6-3
Remote performance monitoring 6-8
Other considerations 7-1
External RF drive source 7-1
External 10 MHz frequency reference 7-2
RF output requirements 8-1
Antenna feed cable 8-1
Antenna system 8-3
Parts and tools 9-1
Parts supplied by Nautel 9-1
Parts not supplied by Nautel 9-2
Tools for installation 9-3
Accessories 10-1
AC line surge protection 10-1
Automatic antenna transfer control unit 10-2
RF contactor 10-2
Automatic switching system 10-3
Dynamic carrier control unit 10-3
Spares 10-4
Extended warranty plans 10-5
Documentation 10-6

XR12 Transmitter Pre-installation Manual
Issue 0.17 2005-08-31 Page iii
XR series on-site or factory training 10-6
Pre-installation assistance 11-1
Pre-installation consulting 11-1
Installation and commissioning service 11-1
Online documentation 11-4
Onsite support 11-4
Training 11-4
Extended warranties 11-5
List of terms 12-1
Index 13-1

XR12 Transmitter Pre-installation Manual
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XR12 Transmitter Pre-installation Manual
Issue 0.17 2005-08-31 Page v
About this manual
This manual provides information about preparing for the delivery and installation of a XR12
transmitter. This manual is intended for use by field technicians, site managers, and installation
planners.
Using this manual
Read the task list provided in Section 2, “Pre-installation tasks” on page 2-1. The task list describes
the preparations you must make prior to receiving and installing the XR12 transmitter.
Later sections of this manual provide reference information regarding physical, cooling, electrical and
antenna requirements.
Features of this manual
This manual contains a number of useful features:
Online
• Click on blue text to jump to a related section or get additional information (for example, to
view a definition of a term).
• To find keywords, use Find in Acrobat Reader’s Edit menu.
• To quickly find a specific section, click the section in the Bookmark list.
Printed
• To find keywords, go to the Index at the end of the manual.
• To find a specific term, go to Section 12, “List of terms” on page 12-1.

XR12 Transmitter Pre-installation Manual
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XR12 transmitter manuals
The XR12 documentation suite includes the following documents:
XR12 Pre-installation Manual, XR12-PREINST. The Pre-installation Manual provides
instructions and reference information needed when planning and preparing for the installation of an
XR12 transmitter.
Nautel Site Protection Manual. The Site Protection Manual provides detailed information
about protecting your site from lightning-related hazards.
XR12 Installation Manual, XR12-INST. The Installation Manual provides instructions and
reference information needed when installing an XR12 transmitter.
XR12 Operating and Maintenance Manual, XR12-OPS-MAINT. The Operating and
Maintenance Manual provides instructions for operating, maintaining and troubleshooting an XR12
transmitter. It also provides reference information needed when performing diagnostic procedures.
XR12 Technical Reference Manual, XR12-REF. The Technical Reference Manual provides
detailed technical information about the XR12 transmitter.
Online resources
The Nautel website provides useful resources to keep you up to date on your XR12 transmitter.
Nautel User Group (NUG)
The website includes a special section that customers can log into in order to access the Nautel
customer newsletter, product manuals, frequently asked questions (FAQ), information sheets, and
information about field upgrades.
Online documentation
The website’s NUG section provides online access to all the documentation for your XR12
transmitter. Documentation is provided in Acrobat (PDF) format. You can use the documentation
online or print the sections that you need.

XR12 Transmitter Pre-installation Manual
Issue 0.17 2005-08-31 Page vii
About safety
All Nautel transmitters are designed to meet the requirements of IEC215, Safety Requirements for Radio
Transmitters. Sequenced key interlocks are offered as an option for those customers that require them.
The philosophy of IEC215 is that the removal of any cover or panel that can only be opened using a
tool is a maintenance activity, and that any person performing a maintenance activity is expected to be
trained for that activity. Under IEC215, it is assumed that trained personnel will be knowledgeable
and will take precautions such as removing all power to the transmitter before accessing its
components.
Electrical hazards
To remove power from the transmitter, switch off and lock out the three-phase power and then wait
10 minutes for the capacitor bank to discharge. There are several ultra-brite LEDs that glow inside
the cabinet to remind anyone who has not turned off the power that the system is live and that there
is serious danger.
Mount the transmitter disconnect close to the transmitter so that it can be reached quickly in an
emergency. Clearly label the disconnect.
After turning off the power, always perform a measurement to confirm that the power is off before
touching anything within the transmitter. If the wrong breaker was opened, the equipment will be
live.
Use only a non-contact voltage probe or a safety voltmeter (available from vendors such as Fluke,
Ideal, and Teagam).
WARNING: It is not enough to push the front panel button that
removes RF power. The power line is still connected and the three
phase rectifier and the large capacitor bank is still charged and is
LETHAL. Even when the three phase power is switched off and "locked
out," the capacitor bank is still charged and requires 10 minutes to
completely discharge.
WARNING: Do not use an ordinary DVM to check for voltage, since it
may have been left inadvertently on the AMP range, triggering a short
and an arc blast that could result in severe burns and even death.

XR12 Transmitter Pre-installation Manual
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Use a proper lockout procedure to ensure that another worker cannot accidentally reapply power
while you are performing maintenance on any part of the transmitter or site.
Lightning hazards
Before opening the transmitter and touching internal parts, remove and solidly ground the antenna
connection.
RF hazards
A serious RF hazard and very high voltages exist in the vicinity of the antenna and its networks
during normal operations.
Other hazards
Ensure that appropriate fire alarms and fire extinguishers are available. Extinguishers must be suitable
for use on electrical fires.
Many other site safety risks exist. It is beyond the scope of this manual to identify all the risks and
procedures.
WARNING: It is not enough to ground the antenna terminal with the
antenna still connected. Even a small impedance in the ground strap
will result in lethal voltages during a lightning strike.