digital radio in action - Hytera Communications Corporation Limited

a report from Wireless Magazine
d out
all key areas and can run from internal
batteries for a period of between two and
five years reducing installation overhead.
Mains operating beacons are also available.
The beacon positions are determined
and installed to meet the security or safety
requirements of the site. Furthermore, a
greater number of beacons lends a greater
accuracy of positional information. A full
survey kit and remote programmer permits
individual beacons to be configured easily
without needing to remove the beacons
from their original location.
An important feature of the Indoor
Locator is its use of the existing radio
infrastructure. Spare capacity on the
radio channel is used for sending
updates in short data messages, thereby
minimising the extra expense of additional
data backhaul capacity. In busy networks,
the system is scalable, allowing additional
infrastructure to be added to provide
dedicated data backhaul.
Outdoor position over wide areas is
provided by radio units equipped with
GPS receivers. Radio user positions
are updated to SafetyNet and can be
plotted onto maps via the SafetyNet
Locator application or simply logged for
archive purposes.
MAPPING OPTIONS
Locator can show the position of
subscribers on a number of different
map formats, which are preloaded
at configuration time as tiles. As
images are held on the computer
permanently, an internet connection is
not necessarily required.
The users can be presented with
location information on a map or image
types including:
● Ordnance Survey Street maps
(United Kingdom)
● GPS maps exported from
OpenStreetMaps or similar
● Overhead photographs
● Schematics or CAD generated
3D images
● Annotated drawings
For outdoor GPS locations, a precise
position is shown on the maps within the
ranges specified; for indoor locations users
will be shown within a boundary or zone
defined on the appropriate map.
Steve Clarke, Director, PMR Products,
says: ‘The SafetyNet Locator offers
resellers of Hytera radio equipment an
opportunity to upsell the application to
make their proposition more attractive to
the end user.
‘It gives them a way to provide the end
user with added value and it is a way of
differentiating themselves and Hytera in
the market.’
ACCESSORIES
LOCATOR RECEIVER MODULE
PMR Products in conjunction
with Hytera have developed
an accessory unit called the
Locator Receiver module that
utilises the radio to transmit
location information to the
SafetyNet software through base
station and fixed mobile based
decoder interfaces.
The Locator receiver module fits
onto the accessory side connector.
The module also provides an audio
accessory audio jack socket providing connections for
microphone, PTT and earpiece.
Indoor and outdoor positioning is available on
TETRA and DMR radios supplied with the (MD) GPS
option. The module is interchangeable between DMR
and TETRA products when suitably programmed.
The Locator receiver is manufactured under licence
by Hytera and is fully approved and tested for use on
the radio equipment specified.
Key features
● Fits into the standard accessory connector
● 3.5mm jack socket for audio accessories
● Sealed to IP54
● Seamless data transmission of location
information
● Tracking and polled modes of operation to suit
bandwidth limitations
● Programmable for future upgrades
● Worldwide dealer and support network.
SPECIFICATIONS
Modes of operation:
● Tracking - module updates on receipt of a new
beacon signal
● Polled - module updates only when requested
by SafetyNet
● Programming: PMR Programming Pod and
Test unit
● Weight: 15g
● Dimensions: 50(l) x 20(w) x 22(h) ‐ height to top
of locking mechanism
● Construction: ABS plastic moulding sealed to
IP66 with positioning tab
● Gold-plated spring connections
● Screw locking mechanism
● Receiver type: IEEE802.15.4
● Protocol: ZigBee PRO compatible
● Receiver freq: 2.4‐2.5GHz Current consumption:
23mA receive, standby 2.6uA
● Receive duty cycle: 15mS TX, 1‐20 seconds
standby (one beacon in range)
● Compliance: ETSI‐300‐328 v1.7.1 / CFR37 FCC
part 15 rules
HYTERA MODELS SUPPORTED:
● DMR: PD785; PD785G (MD); PD705; PD705G (MD)
● TETRA: PT580H; PT580
● Radio infrastructure: TETRA; DMR Tier 2; DMR Tier
3 (available 2013)
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