Section 9 Other Functions; Vswr Readings; Wwv/Wwvh Reception - Icom ic-751a Instruction Manual

SECTION
9
OTHER FUNCTIONS
9-1
VSWR
READINGS
9
-
2
WWV/WWVH
RECEPTION
The
IC-751
A
has a built-in
VSWR
meter
to
check antenna matching
as
an
aid
in
avoiding problems caused
by
high
VSWR.
1
)
Set the
METER
SWITCH
to
"Po".
2)
Select the
RTTY
operating
mode.
3) Place the
TRANSMIT/RECEIVE SWITCH
at
TRANSMIT.
4)
Adjust the
RF
POWER CONTROL
located
on the front panel to
place the meter needle
at
"SET"
on
the
SWR
scale.
5)
Set the
METER
SWITCH
to
"SWR".
Read
the
VSWR
from
the
SWR
scale.
NOTE;
Always
use
a
50
ohm
antenna system
in
order to obtain
full
output
power
and to avoid
possible
damage
to the
transmitter.
,
.
The
signal
from
radio station
WWV
or
WWVH
may
be used for
alignment of
a
frequency counter, the
marker
oscillator
or the
fre-
quency
display.
1)
Select
the
10MHz
band
using either the
HAM BAND
or
GENERAL COVERAGE
mode.
2)
Push the
AM
SWITCH.
3)
Use the
TUNING
CONTROL
to
select
lO.OOO.OMHz.
Reception of
WWV/WWVH
is
also possible
on
2.5,
5 and
15MHz.
Use the frequency
which
has the strongest
signal at
your
location.
Refer to
SECTION 12-3 ADJUSTMENTS
for further information.
-
43
-