Sepura SCG22 Series, Installation Manual

Page: 19 / 40

17
Antenna Connections
TETRA Antenna
For best all round performance of the product, the antenna should be
fitted on the centre of the vehicle roof. Alternative positions, such as wing
mounting, will give degraded performance. The coaxial feeder should be
secured along its length to eliminate the possibility of damage by sharp
edges or moving parts.
WARNING! Observe all safety warnings relating to the
location and use of the antennas.
GNSS Antenna Installation
The SCG22 can be licensed to activate the GNSS antenna socket.
Please note that the transceiver tracks GLONASS and GPS satellites
simultaneously. See customer support bulletin CUS-14-2045.
The antenna unit connects to a SMC connector on the rear panel of the
transceiver and should, ideally, be mounted on the highest point of the
vehicle (i.e., roof) with an uninterrupted view of the sky, and as far from
the TETRA antenna as possible. For mounting, follow the manufacturer’s
installation instructions. It is recommended to fit the GNSS antenna
connector before connecting the Remote Console Cable.
An active antenna is recommended, the supply of which is on the centre
pin, 5 V nominal, 40 mA maximum. This supply feed is short circuit
protected.
Bluetooth/Wi-Fi Antenna Installation (optional)
If a Bluetooth/Wi-Fi receiver is fitted at the time of manufacture, a
Bluetooth/Wi-Fi antenna socket will be fitted.
The antenna unit connects to a SMA connector on the rear panel of
the transceiver and should, ideally, be mounted on the highest point of
the vehicle (i.e., roof), and as far from the TETRA antenna as possible.
For mounting, follow the manufacturer’s installation instructions. It
is recommended to fit the Bluetooth/Wi-Fi antenna connector before
connecting the Remote Console Cable.
Digital I/O Connections
The following lead options provide programmable IO connection lines:
• SCG Power / Ign / IO Adapter Lead
• SCG Loudspeaker / IO Lead
• SCG Loudspeaker / IO USB Host Lead
• SCG Expansion Board Loudspeaker / 8 GPIO Lead
If any of these IO connection options are to be used, see the section
"Programmable I/O" on page 22.
CAUTION! If not used, fold and tie any unterminated
IO line wires so that they are tidy and cannot make
electrical connection with other components or
conductive surfaces.
USB Connections
A host* connection lead is available for connecting approved USB
devices:
• SCG Loudspeaker / IO USB Host Lead
CAUTION! * Do not exceed the maximum current
rating when powering USB devices.
Ethernet Connection (optional)
The SCG Ethernet connector provides an additional connection for data.
CAUTION! To maintain an IP54 rating, the BNC, SMC
and SMA connectors must provide a seal.