Control
UNIFY
PRO
VTX
with
SmartAudio
After
the
Sept.
2017
firmware
update,
the
CROSSFIRE
RX
Micro
V2
(DIVERSITY
RX
not
supported)
can
be
directly
connected
to
a
TBS
UNIFY
PRO
video
transmitter
and
be
controlled
using
our
SmartAudio
technology.
SmartAudio
provides
UART
and
I2C
control
for
your
video
transmitter.
Parameters
such
as
output
power,
bands,
channels
and
frequency
can
be
freely
controlled.
This
enables
remote
channel
control
directly
from
your
radio
(TBS
CROSSFIRE
OLED
display,
TBS
TANGO
with
TBS
CROSSFIRE
or
OpenTX
compatible
remote),
from
the
OSD
(e.g.
TBS
CORE
PRO)
or
a
smart
device/mobile
(TBS
CROSSFIRE
TX
with
bluetooth
or
wifi
module
required).
The
setup
is
easy
and
simply
requires
the
CROSSFIRE
RX
SIGNAL-pin
and
GND
to
be
connected
to
the
UNIFY
AUD
and
GND,
respectively.
You
need
to
make
a
custom
cable
for
this.
You
also
need
to
configure
the
CROSSFIRE
RX
channel
mapping
to
output
“SmartAudio”
on
the
specific
output
channel,
see
the
“Configuration”
chapter
later
on
in
this
manual
on
how
to
access-
and
navigate
the
menu.
Antenna
Transmitter
antenna
Diversity
receiver
antenna
The
TBS
CROSSFIRE
kit
comes
with
standard
dipole
antennas,
these
are
perfect
for
normal
flying.
Metallic
objects,
such
as
cables
or
handles,
should
be
kept
away
from
the
antenna
while
it
is
in
use,
from
both
the
transmitter
and
the
receiver.
The
amount
of
clearance
required
is
higher
for
lower
frequencies
than
it
is
for
higher
frequencies.
To
achieve
the
best
range
possible,
the
900
MHz
antenna
needs
to
be
almost
60%
higher
compared
to
a
normal
2.4GHz
setup.
In
normal
use
try
to
hold
the
radio
fairly
high
off
the
ground
and
with
the
antenna
vertical,
without
straining
yourself
of
course.
This
is
also
a
good
technique
you
can
use
to
quickly
improve
the
RF
transmission
if
the
link
is
about
to
fail
or
you
briefly
lost
the
signal.
Standing
on
a
hillside
or
on
top
of
a
slope
also
helps
to
improve
the
conditions
and
range.
17