3. transmitter operation – Kenwood TM-431E User Manual
Page 20
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4-3. TRANSMITTER OPERATION
Cautions:---------------------------------------------------------- --------------------------------- ----
1.
Ensure
that
an
antenna
with
a
low
standing
wave
ratio
(SWR)
is
attached
to
the
antenna
connector
before
at
tempting
to
transmit.
Failure
to
provide
proper
termina
tion may result in damage to the final amplifier section.
2.
Always
check
to
ensure
the
frequency
is
clear
before
transmitting.
Note: —---------------------------------------------------------------------------------------------
The
use
of
LOW
power
is
recommended,
whenever
possi
ble, to avoid interfering with other stations.
Transmit
1.
Select
the
desired
operating
frequency
using
any
of
the
methods previously discussed.
2.
Check the frequency to see if it is occupied before you
transmit.
3.
Press
the
PTT
switch.
The
ON
AIR
indicator
will
light,
and the RF meter will deflect to the right.
Note:--------------------------------------------------------------------------------------------------
If
you
have
selected
the
LOW
power
position,
the
low
indicator will appear in the display and the RF meter will
only
deflect
slightly.
When
HI
power
has
been
selected
the RF meter will swing full scale.
4.
Speak
into
the
microphone.
The
recommended
distance
to the microphone is 5 cm (2 inches).
Note:-------------------------------------------------------------------------------------------------
Talking
closer
may
result
in
overdeviation
of
your
trans
mit
signal,
which
might
be
reported
as
a
loss
of
clarity
or
of
an
excessively
wide
transmit
signal.
Talking
too
far
away may result in reports of weak audio.
20
5.
Release the PTT switch to return to the receive mode.
The ON AIR indicator should go out, and the RF meter
will return to zero.
4-4. MEMORY OPERATIONS
4-4-1. Microprocessor Memory back-up
A
lithium
battery
is
contained
in
this
transceiver
to
retain
memory.
Turning
OFF
the
POWER
switch,
disconnecting
the
power
cable
or
an
intermittent
power
failure
will
not
erase
the memories. The battery life is estimated at 5 years. When
the
battery
has
been
exhausted
erroneous
information
might
appear in the display.
Lithium
battery
replacement
should
be
performed
by
an
authorized
KENWOOD
service
facility,
or
your
authorized
KENWOOD
dealer.
This
equipment
contains
CMOS
circuitry
and can be damaged by improper replacement procedures.
4-4-2. Microprocessor Initialization
The
initial
state of
the
microprocessor,
as delivered from the
factory is shown in the following chart.