EC DECLARATION OF CONFORMITY....................................................................................................................7
Glossary of Terms .......................................................................................................................................................... 8
Key to AFL RF Module Drawing Symbols....................................................................................................................9
1.1Earthing of Equipment ...................................................................................................................................... 10
2.1General System Description.............................................................................................................................. 13
3.4Power Distribution Sketch ................................................................................................................................ 17
3.5Weehawken VHF System Frequencies Look-up Table..................................................................................... 18
6.2.3Alarm/Monitor Shelf Parts List................................................................................................................. 49
9.1.5Checking service ....................................................................................................................................... 71
9.1.7Service Support ......................................................................................................................................... 72
9.2Tools & Test Equipment ................................................................................................................................... 72
9.3Care of Modules................................................................................................................................................ 73
This handbook is for use solely with the equipment identified by the AFL Part Number shown
on the front cover. It is not to be used with any other equipment unless specifically authorised
by Aerial Facilities Limited.
Purpose
The purpose of this handbook is to provide the user/maintainer with sufficient information to
service and repair the equipment to the level agreed. Maintenance and adjustments to any
deeper level must be performed by AFL, normally at the company’s repair facility in Chesham,
England.
This handbook has been prepared in accordance with BS 4884, and AFL’s Quality procedures,
which maintain the company’s registration to BS EN ISO 9001:2000 and to the R&TTE
Directive of the European Parliament. Copies of the relevant certificates and the company
Quality Manual can be supplied on application to the Quality Manager.
This document fulfils the relevant requirements of Article 6 of the R&TTE Directive.
Limitation of Information Notice
This manual is written for the use of technically competent operators/service persons. No
liability is accepted by AFL for use or misuse of this manual, the information contained
therein, or the consequences of any actions resulting from the use of the said information,
including, but not limited to, descriptive, procedural, typographical, arithmetical, or listing
errors.
Furthermore, AFL does not warrant the absolute accuracy of the information contained within
this manual, or it’s completeness, fitness for purpose, or scope.
AFL has a policy of continuous product development and enhancement, and as such, reserves
the right to amend, alter, update and generally change the contents, appearance and pertinence
of this document without notice.
All AFL products carry a twelve month warranty from date of shipment. The warranty is
expressly on a return to base repair or exchange basis and the warranty cover does not extend to
on-site repair or complete unit exchange.
DECLARES, UNDER OUR SOLE RESPONSIBILITY THAT THE FOLLOWING PRODUCT
0086
PRODUCT PART NO[S] 55-154701, 55-154801
PRODUCT DESCRIPTION Weehawken VHF amplifier system
IN ACCORDANCE WITH THE FOLLOWING DIRECTIVES:
1999/5/EC The Radio & Telecommunications Terminal Equipment Directive Annex V and its amending
directives
HAS BEEN DESIGNED AND MANUFACTURED TO THE FOLLOWING STANDARD[S] OR OTHER
NORMATIVE DOCUMENT[S]:
BS EN 60950 Information technology equipment. Safety. General requirements
ETS EN 301 489-1 EMC standard for radio equipment and services. Part 1. Common technical
requirements
I hereby declare that the equipment named above has been designed to comply with the relevant sections of the
above referenced specifications. The unit complies with all essential requirements of the Directives.
Repeater or
Cell Enhancer A Radio Frequency (RF) amplifier which can simultaneously
amplify and re-broadcast Mobile Station (MS) and Base
Transceiver Station (BTS) signals.
Band SelectiveRepeater A Cell Enhancer designed for operation on a range of channels
within a specified frequency band.
Channel Selective
Repeater A Cell Enhancer, designed for operation on specified
channel(s) within a specified frequency band. Channel
frequencies may be factory set or on-site programmable.
AC Alternating Current
AGC Automatic Gain Control
BBU Battery Backup Unit
BTS Base Transceiver Station
CEMS Coverage Enhanced Management System
C/NR Carrier-to-Noise Ratio
DC Direct Current
Downlink (D/L) RF signals Tx from the BTS to the Master Site
FO Fibre Optic
GND Ground
ID Identification Number
LED Light Emitting Diode
LNA Low Noise Amplifier
LPA Low Power Amplifier
MOU Master Optical Unit
M.S. Mobile Station
MTBF Mean Time Between Failures
N/A Not Applicable
N/C No Connection
OFR On Frequency Repeater
OIP3 Output Third Order Intercept Point = RF
+(C/I)/2
out
PA Power Amplifier
RF Radio Frequency
RSA Receiver/Splitter Amplifier
Rx Receiver
S/N Serial Number
Tx Transmitter
Uplink (U/L) RF signals transmitted from the MS to the BTS
VSWR Voltage Standing Wave Ratio
WDM Wave division multiplex
Cell Enhancers supplied from the mains must be connected to grounded outlets and earthed in
conformity with appropriate local, national and international electricity supply and safety
regulations.
1.2 Electric Shock Hazard
Electrical shocks due to faulty mains driven power supplies.
Whilst ever potentially present in any electrical equipment, such a condition would be
minimised by quality installation practice and thorough testing at:
a) Original assembly
b) Commissioning
c) Regular intervals, thereafter.
All test equipment to be in good working order prior to its use. High current power supplies can
be dangerous because of the possibility of substantial arcing. Always switch off during
disconnection and reconnection.
RF radiation, (especially at UHF frequencies) arising from transmitter outputs connected to
AFL’s equipment, must be considered a safety hazard.
This condition might only occur in the event of cable disconnection, or because a ‘spare’ output
has been left unterminated. Either of these conditions would impair the system’s efficiency. No
investigation should be carried out until all RF power sources have been removed. This would
always be a wise precaution, despite the severe mismatch between the impedance of an N type
connector at 50, and that of free space at 377, which would severely mitigate against the
efficient radiation of RF power. Radio frequency burns could also be a hazard, if any RF power
carrying components were to be carelessly touched!
Antenna positions should be chosen to comply with requirements (both local & statutory)
regarding exposure of personnel to RF radiation. When connected to an antenna, the unit is
capable of producing RF field strengths, which may exceed guideline safe values especially if
used with antennas having appreciable gain. In this regard the use of directional antennas with
backscreens and a strict site rule that personnel must remain behind the screen while the RF
power is on, is strongly recommended.
Where the equipment is used near power lines, or in association with temporary masts not
having lightning protection, the use of a safety earth connected to the case-earthing bolt is
strongly advised.
Beryllium Oxide, also known as Beryllium Monoxide, or Thermalox™, is sometimes used in
devices within equipment produced by Aerial Facilities Ltd. Beryllium oxide dust can be toxic if
inhaled, leading to chronic respiratory problems. It is harmless if ingested or by contact.
Products that contain beryllium are load terminations (dummy loads) and some power
amplifiers. These products can be identified by a yellow and black “skull and crossbones”
danger symbol (shown above). They are marked as hazardous in line with international
regulations, but pose no threat under normal circumstances. Only if a component containing
beryllium oxide has suffered catastrophic failure, or exploded, will there be any danger of the
formation of dust. Any dust that has been created will be contained within the equipment
module as long as the module remains sealed. For this reason, any module carrying the yellow
and black danger sign should not be opened. If the equipment is suspected of failure, or is at the
end of its life-cycle, it must be returned to Aerial Facilities Ltd for disposal.
To return such equipment, please contact the Quality Department, who will give you a Returned
Materials Authorisation (RMA) number. Please quote this number on the packing documents,
and on all correspondence relating to the shipment.
PolyTetraFluoroEthylene, (P.T.F.E.) and P.T.F.E. Composite Materials
Many modules/components in AFL equipment contain P.T.F.E. as part of the RF insulation
barrier.
This material should never be heated to the point where smoke or fumes are evolved. Any
person feeling drowsy after coming into contact with P.T.F.E. especially dust or fumes should
seek medical attention.
The Weehawken tunnel radio system is designed to amplify various bands of radio frequencies,
in either channelised or band selective modes. This handbook is dedicated to the VHF radio
repeating system. All the hardware (except the River Portal remote BDA) is built into standard
19” rack mounted cabinets which have an environmental IP rating of 54.
The systems in this document will be described separately, as individual shelves (VHF) and the
various passive combiners, splitters and cross-band coupler shelves will be described in other
documents. Every active module in the entire system has a dedicated alarm and these are series
wired within the shelves to a relay which gives a volt-free output pair for each shelf which is
wired to a ‘krone-block’ termination in the rack cabinet.
3.5 Weehawken VHF System Frequencies Look-up Table
Agency
Jersey City Medical Center - EMS VHF CHN 1 153.7850 153.7850
North Hudson Regional Fire and Rescue VHF CHN 2 154.3250 154.3250
NJ Statewide Police (SPEN) VHF CHN 3 154.6800 154.6800
Jersey City Medical Center - EMS VHF CHN 4 155.2350 155.2350
Jersey City Medical Center - EMS VHF CHN 5 155.2800 155.2800
North Hudson Regional Fire and Rescue VHF CHN 6 158.8650 154.1450
Weehawken Township VHF CHN 7 159.0900 159.0900
Weehawken Township VHF CHN 8 159.2100 159.2100
New Jersey Transit Police Dept. VHF CHN 9 161.5200 160.8300
The simplex shelves are part of the VHF amplification and have crystal filters instead of
bandpass filters to set bandwidths. There are two downlink bands and three uplink bands, the
downlink paths having isolators fitted to each of the 5Watt output stages to prevent two
outputs from interfering with each other. All amplifiers have built-in alarms which are
configured as a summary, volt-free relay contact pair terminating at pins 1 & 2 on the ‘D’
type alarm connector.
Note that the control circuitry is omitted from the system diagram for reasons of clarity and
simplification.