Microphone Connector - Yaesu FT DX 3000 Operating Manual

f
ront
PHONES Jack
inch contact jac accepts either monaural or
stereo headphones ith
a plug is inserted the loudspea er is disa led.
n :
ote
hen earing headphones
turn the ain le els do n to their lo est settings
efore turning po er on to minimi e the impact on
your hearing caused y audio pops during s itch
on.

Microphone Connector

This 8-pin jack accepts input from a microphone uti-
li ing a traditional
[ ANT ] Switch
ressing this s itch selects the ANT 1 ANT 2 or
the ANT 3 connector on the rear panel and allo s
convenient antenna switching at the press of a but-
ton. The selected antenna jack is indicated on the
loc iagram isplay
isplay.
A :
dvice
he jac ena les to use as an antenna for re-
ception only using the
I . ee page .
[ IPO ] ( i
p
ntercept oint
This button may be used to
end characteristics of the receiver circuit for a very
strong signal en ironment.
lo distortion amplifier
lo distortion amplifier or I
front end amplifier . he selected recei er
amplifier appears in the I
iagram isplay on the display.
[ ATT ] Switch
his utton selects the degree of attenuation if any
to be applied to the receiver input.
aila le selections are
. he attenuation le el appears in the
umn of the loc iagram isplay on the display.
A :
dvice
he ttenuator may e used in conjunction ith the
[ IPO button to provide two stages of signal reduc-
tion when an extremely strong signal is being re-
ceived.
[ R.FLT ] ( r
F
ooFing ilter
his utton selects the and idth of the recei er first
I oofing ilter. aila le selections are
he selected and idth appears in the .
of the loc iagram isplay on the
e uires optional
A :
dvice
he selection mode selects the optimum
and idth of the oofing filter for the reception
F T 30 00 O
DX peraTing
p
anel
or contact plugs. hen
e recommend that you
transcei er pinout.
shown in the Transceiver
enu item
) Switch
o
ptiMizAtion
set the optimum front
aila le selections are
stage
ypasses the
column of the loc
d d d or
col-
) Switch
*
or uto.
column
display.
arro ilter.
M
anual
c
ontrols
mode. In this case the selected and idth in
the . column of the
play glo s yello
Blue).
ecause the roofing filter is in the first I
protection it provides against interference is
uite significant.
and
and
ho e er you may
ter for the ma imum possi le interference rejec-
tion.
[ NB ] Switch
his utton turns the I
ress this utton momentarily to reduce short dura-
tion pulse noise.
aila le selections are
attenuation le el appears in the
loc iagram isplay on the display.
[ AGC ] Switch
his utton selects the
recei er. aila le selections are
and or
-
tics appear in the
isplay on the
ress the [ AGC button
sired recei er reco ery time constant. ress and hold
in the [ AGC button for one second to disable the
for testing or ea signal reception .
A :
dvice
he
teristics of the
selected
the column of the loc
unselected characteristics glo
he ttenuator may e used in conjunction
the [ IPO button to provide two stages of signal
reduction when an extremely strong signal is be-
ing received.
If the recei er reco ery time is set to
by pressing and holding in the [ AGC
meter ill no longer de ect. dditionally you
will likely encounter distortion on stronger sig-
nals as the I amplifiers and the follo ing stages
are probably being overloaded.
[ MOX ] Switch
ressing this utton engages the
circuit to acti ate the transmitter the
this utton ill glo red . It must e turned off the
red ill e off for reception. his utton repli-
cates the action of the ush to al
the microphone. When engaging the [ MOX
or other ise causing a transmission to e started
e certain you ha e either an antenna or
dummy load connected to the selected ntenna jac .
& s
witches
loc iagram
he unselected choices glo
hen set to
the and idth is
is . n a cro ded
ish to select the
oise lan er on and off.
or
column of the
characteristics for the
I
. he selected characteris-
column of the loc
display.
repeatedly to select the de-
selection mode selects the charac-
for the reception mode. he
characteristics ill glo
iagram
lue .
utton the
ush to al
s itch on
Page 17
is-
the
hile
and
fil-
. he
iagram
green in
isplay
ith
ff
inside
utton
hm