Tait TBAK2 Users Manual
4 Installation
This chapter describes how to install the TB8100 BSS in a standard 19 inch
rack or cabinet. It also provides some general information on safety
precautions and site requirements. We recommend that you read the entire
chapter before beginning the installation.
4.1 Personal Safety
Lethal Voltages
Warning!! The PMU contains voltages that may be lethal.
Refer to the ratings label on the rear of the
module.
The TB8100 BSS must be installed so that the rear of the PMU is located
in a service access area. Disconnect the mains IEC connector and wait for
five minutes for the internal voltages to self-discharge before dismantling.
The AC power on/off switch does not isolate the PMU from the mains. It
breaks only the phase circuit, not the neutral.
The PMU should be serviced only by qualified technicians. All servicing
should be carried out only when the PMU is powered through a mains
isolating transformer of sufficient rating. We strongly recommend that
the mains power to the whole of the repair and test area is supplied via an
earth leakage circuit breaker.
Explosive Environments
Warning!! Do not operate TB8100 BSS equipment near
electrical blasting caps or in an explosive atmosphere. Operating the equipment in these environments is a definite safety hazard.
Proximity to RF Transmissions
Do not operate the transmitter when someone is standing within 90cm (3ft)
of the antenna. Do not operate the transmitter unless you have checked that
all RF connectors are secure.
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High Temperatures
Take care when handling a PMU or PA which has been operating recently.
Under extreme operating conditions (+60° C [+140° F] ambient air
temperature) the external surfaces of the PMU and PA can reach
temperatures of up to +80° C (+176°F).
4.2 Equipment Safety
ESD Precautions
Important This equipment contains devices which are susceptible to
damage from static charges. You must handle these devices
carefully and according to the procedures described in the
manufacturers’ data books.
We recommend you purchase an antistatic bench kit from a reputable
manufacturer and install and test it according to the manufacturer’s
instructions. Figure 4.1 shows a typical antistatic bench set-up.
You can obtain further information on antistatic precautions and the dangers
of electrostatic discharge (ESD) from standards such as ESD S4.1-1997
(revised) or BS EN 100015-4 1994.
Figure 4.1 Typical Antistatic Bench Set-up
conductive wrist strap
to building ground
or mains ground
via 1M ohm series
resistor
dissipative rubber
bench mat
Aerial Load
The TB8100 BSS equipment has been designed to operate safely under a
wide range of aerial loading conditions. However, we strongly recommend
that the transmitter should always be operated with a suitable load to prevent
damage to the transmitter output power stage.
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Equipment Grounding
To ensure safe operation the TB8100 BSS equipment must be correctly
grounded as described in these installation instructions.
Installation and Servicing Personnel
The TB8100 BSS should be installed and serviced only by qualified
personnel.
4.3 Regulatory Information
Distress Frequencies
The 406 to 406.1MHz frequency range is reserved worldwide for use by
Distress Beacons. Do not program transmitters to operate in this frequency
range.
FCC Compliance
This device complies with part 15 of the FCC Rules. Operation is subject
to the condition that this device does not cause harmful interference.
Unauthorised Modifications
Any modifications you make to this equipment which are not authorised by
Tait Electronics Ltd may invalidate your compliance authority’s approval to
operate the equipment.
4.4 Environmental Conditions
Operating Temperature Range
The operating temperature range of the TB8100 BSS is –30°C to +60°C
(–22°F to +140°F) ambient temperature. Ambient temperature is defined
as the temperature of the air at the intake to the cooling fans.
Humidity
The humidity should not exceed 95% relative humidity through the
specified operating temperature range.
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© Tait Electronics Ltd June 2003
Dust and Dirt
For uncontrolled environments, the level of airborne particulates must not
exceed 100µg/m
3
.
4.5 Grounding and Lightning Protection
Electrical Ground
The TB8100 BSS modules are grounded by physical contact between the
module case and the subrack. To ensure a good ground connection you
must tighten each module retaining clamp securely (refer to “Final
Reassembly” on page 53 for the correct torque setting).
A threaded grounding connector is provided on the rear of the subrack for
connection to the site ground point (refer to “Connection” on page 55 for
more details).
Lightning Ground
It is extremely important for the security of the site and its equipment that
you take adequate precautions against lightning strike. While it is outside
the scope of this manual to provide comprehensive information on this
subject, the following guidelines apply:
■ install a suitable lightning rod at the top of the tower and connect it to a
secure ground point with appropriate conductors and connectors
■ position site buildings and equipment within the cone of protection
provided by the grounded tower
■ protect all cables entering the site to prevent lightning energy from
entering site buildings.
4.6 Recommended Tools
It is beyond the scope of this manual to list every tool that an installation
technician should carry. However, the following tools are specifically
required for installing the TB8100 BSS:
■ Pozidriv PZ3 screwdriver for the M6 screws used to secure the subrack
to the rack or cabinet, and also for the DC input terminals on the PMU
■ Pozidriv PZ2 screwdriver for the M4 screws used to secure the module
retaining clamps
■ 0.25in or 6mm flat blade screwdriver for the fasteners used to secure the
front panel to the subrack
■ 8mm AF spanner for the SMA connectors.
34 Installation TB8100 Installation and Operation Manual
© Tait Electronics Ltd June 2003
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