Yaesu FT DX 3000 Operating Manual page 51

he I feature allo s the operator to optimi e the characteristics of the recei er front end depending on the current
noise level and the strength of incoming signals.
ress the [ IPO
utton repeatedly to set the desired
characteristic of the recei er front end according to the
chart below.
AMP1 mplifies the incoming signals using a lo
distortion preamplifier gain appro .
dB).
mplifies the incoming signals using a
AMP2
stage lo distortion
gain appro .
ypasses the
IPO
feed to the first mi er.
he selected recei er preamplifier
in the I column of the loc
TFT display.
A :
dvice
he I selection ill e memori ed independently
on each stac of
n the and lo er ands it generally is not
necessary to use any preamplifier at all selecting the
I position as descri ed a o e
strong signal handling capa ility of the recei er and
generally will result in more pleasant reception due
to reduced noise. If you can hear band noise with the
preamplifiers disengaged then a preamplifier is gen-
erally not needed.
n :
ote
he I feature is al ays on I
fier et een and .
FT 3000 O
DX peraTing
i
nterference
ipo ( i
ntercept
preamplifier total
d .
preamplifier yielding direct
ill e indicated
iagram isplay on the
and .
ill increase the
o preampli-
.
M
anual
p o
oint ptiMizAtion
[ IPO ] Button
Indicates which front
end RF amplifier
b
locK
r
ejection
)
d d
iAgrAM iSplAy
Page 49