Avoiding Internal Spurious Signals ("Birdies"') - Yaesu VX-1R Manual

D
Hold both
·~
and
~
while turning
the power on, and
when the display
appears as shown
here, release the
two keys.
SAVE
Vot•lll 5/p
You can now resume operation; the Menu settings are
reset to their factory defaults (see the chart on page 42).
Microprocessor "Hard" Reset
If the microprocessor must be completely reset, use
this procedure. All memories are cleared, and the
transceiver is restored to its factory default status.
D
Tum the radio Off.
0
Hold
:~·
and
~:
while turning the
radio on. The con-
firmation display
appears as at right.
0
Press
·~
momen-
tarily to initialize
the radio. The dis-
play changes to
that shown at the
right.
T
Ill
T
1'7
1
C
..Liii.Li
SAVE
T
Ill
T TRI
..L.111..L I/
L
SAVE
If the display does not change, press
·~
again mo-
mentarily.
A voiding Internal Spurious Signals
("Birdies'}
Any transceiver capable of such wide frequency cov-
erage can produce spurious receiver responses at an
audible level on certain frequencies, because oscilla-
tors inside the radio operate on sub-harmonics of
those frequencies within the receiving range of the
transceiver. Rarely will this occur on a channel on
which you wish to operate, but if this should happen,
you can shift the clock frequency of the microproces-
sor in the VX-IR, to move the "beat" signal away
from the channel you want to use. Here's how to do
this:
0
Hold
e
for I second to activate the SET mode.
0
Press
~
or
[S
to select Menu Item #21 [ L
NS'
F ;
("Clock Shift").
0
Tum the Dial one click to change the display from
GFF to OtJ (or vice versa).
D
Press
e
once more (momentarily) to save the new
setting and exit.
0
Now listen to channel that was previously experi-
encing interference. If the spurious signal was, in-
deed, being generated inside the VX-lR, it should
have disappeared.