Yaesu FTdx5000 Series Operating Manual page 5

F P
RONT ANEL
[ ATT ] Switch
Move this knob up and down to select the degree of
attenuation, if any, to be applied to the receiver input.
Available selections are "–6 dB", "–12 dB", "–18 dB",
or "OFF", and the selected attenuation level appears
in the ATT column of the Block Diagram Display on
the display.
A :
DVICE
ˆ Press this knob briefly to select the attenuation level
to "OFF" for quick selection.
ˆ The Attenuator may be used in conjunction with
the [ IPO ] switch to provide two stages of signal
reduction when an extremely strong signal is being
received.
[ IPO ] ( I
P
NTERCEPT OINT
Move this knob up and down to select the optimum
front end characteristics of the receiver circuit for a
very strong-signal environment. Available selections
are "AMP 1", "AMP 2", "IPO 1", or "IPO 2".
Normally, this selection is set to "AMP1". If you want
to increase the sensitivity, this selection selects to
"AMP2". When this selection is set to "IPO1", the IPO
is improved. When this selection is set to "IPO2", by-
passes the RF preamplifier, yielding direct feed to the
first mixer. As a result, the IPO is improved more.
A :
DVICE
ˆ Press this knob briefly to select the IPO setting to
"AMP1" for quick selection.
ˆ "IPO 2" selection can not selet in VFO-B.
Page 18
C
ONTROLS
) Switch
O
PTIMIZATION
& S
WITCHES
[ R.FLT ] Switch
Move this knob up and down to select the bandwidth
for the first IF Roofing Filter. Available selections are
"300 Hz", "600 Hz", "3 kHz", "6 kHz", "15 kHz", or
"AUTO" ("300 Hz" and "600 Hz" are select only in
VFO-A, additionally, "300 Hz" is option, except MP
version), and the selected bandwidth appears in the
R.FLT column of the Block Diagram Display on the
display.
A :
DVICE
ˆ Press this knob briefly to select to "AUTO" for
quick selection.
ˆ Because the roofing filter is in the first IF, the pro-
tection it provides against interference is quite sig-
nificant. When set to "AUTO", the SSB bandwidth
is 6 kHz, while CW is 3 kHz, and FM/RTTY are
15 kHz. On a crowded SSB band, however, you
may wish to select the 3 kHz filter, for the maxi-
mum possible interference rejection.
FT 5000 O
DX
M
PERATING ANUAL