2-5
Key Features of 6.25kHz digital
6.25kHz Digital mode ready*
With the optional UT-119H, the IC-F3062 series provides 6.25kHz digital narrow mode
communication, and increases efficiency of channel allocation and use of spectrum.
The IC-F3062 series provides 2 optional slots: one optional slot for the UT-119H digital unit and
one for another option board.
*Digital operation may not be allowed in some countries due to regulatory issues. Please ask your dealer for details.
9
NewF3062tal Land Mobile 6.25kHz Technology
This technology is a new digital communications protocol
that provides quality voice and data, and is designed as
a non-proprietary protocol. It accomplishes this by using
4LFSK (4-Level Frequency Shift Keying) and FDMA
(Frequency Division Multiple Access).
This method has a number of advantages:
•better communication range
•simpler design
•easy to maintain and service
•lower cost for business and industry customers
•compatible with existing FM radio hardware
Icom’s has implemented this technology in the F3062
series. To enable backwards compatibility, the radio is
both analog and digital and also works in 25 kHz and
12.5 kHz channel bandwidths (conventional and LTR™
trunked operation in analog mode).
Future Applications for 6.25kHz Technology
This new digital land mobile technology can be a
platform for future integration of IT/IP/VOIP
technologies. To this end, there are some initiatives
between a number of manufacturers to promote
6.25kHz technology more widely. An example is the
formation of the dPMR MoU in Europe, and the FCC in
the U.S.A.
has recently proposed that system owners
consider switching to 6.25kHz technology where
possible. Japan and China are also considering 6.25kHz
for future digital radio standards.
Multi-site IP Networks
Backwards compatibility to analog only radios enables
a planned migration path to “digital”
with existing
radios operating analog only and new radios operating
analog and digital.
General specifications:
Access Method
: FDMA
Transmission Rate
: 4800 bps
Modulation
: 4-level FSK
Vocoder: AMBE+2™
Codec Rate
: 3600 (Voice 2,450 + Error
Correction 1,150 bps)
In this example, a gateway to the internet is attached
to each repeater. This enables networks to be built
using the internet as part of the infrastructure.
Integrated PC and Radio
Here, the PC is connected to the internet to
communicate through the remote repeater.
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