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Sp
ecification
s
Internal
FH915+
Modem
General
Specifications
80
P/N:
1001608
‐
01
Internal FH915+ Modem General Specifications
Operation modes
Transmitter
Receiver
Repeater
a.
Dependent
on
the
country
and
region,
and
mode
(base/rover)
of
operation.
b.
Use
of
PDL
and
Satel
4FSK
protocols
is
recommended
in
applications
where
possible.
Note
that
a
minimum
baud
rate
of
9600
bps
is
recommended
for
all
RTK
operations.
Compatibility
with
TrimTalk
is
subject
to
some
restrictions.
c.
http://transition.fcc.gov/pshs/public
‐
safety
‐
spectrum/narrowbanding
‐
faq.html
for
details.
Similar
restrictions
are
also
in
place
in
other
global
markets.
Please
contact
your
Dealer
or
local
government
radio
authority
to
ensure
you
understand
local
compliance
obligations.
Table
8.
Internal
FH915+
Modem
General
Specifications
Parameter
Specification
Operating frequency range
country/region/purpose dependent
902 to 928 MHz, United States
915 to 925 MHz, Australia
Signal structuring
Frequency hopping spread spectrum
Hopping pattern
5 per band, user-selected
Hopping channels
128
Occupied bandwidth
100
KHz
Frequency modulation technique
FSK, 64 Kbps
Table
7.
GRX2
Digital
UHF
II
Modem
General
Specifications
(Continued)
Parameter
Specification