Yaesu FT DX 9000 CONTEST - MANUAL 2 Operation Manual page 28

F P
RONT ANEL
C.S Switch
Press this button momentarily to recall a favorite Menu
Selection directly.
To program a Menu selection as the short-cut, press
the MNU key (#
Menu, then select the item you want to set as the short-
cut. Now press and hold in the C/S key for two sec-
onds; this will lock in the selected Menu item as the
short-cut.
RF PWR BIAS Knobs
RF PWR Knob
This is the main RF Power output control for the trans-
ceiver, active in all operating modes. Clockwise rota-
tion increases the power output. Adjust this control
for the desired power output from the FT
Contest, or for the desired system output when using
a linear amplifier or transverter.
BIAS Knob
During SSB operation, pressing the CLASS-A but-
ton (# below) will lower the power output to a maxi-
mum of 75 Watts, and the BIAS control will then
provide adjustment of the final amplifier Bias level
between classes AB and A. Full Class-A operation pro-
vides an ultra-clean SSB wave-form. Because Class
A is a high-bias, low-efficiency mode, you should
monitor the heat sink temperature (using the "SWR"
page on the LCD periodically to ensure that the oper-
ating temperature is within the safe range, and you
may adjust the Bias level more toward the "AB" side
if the heat sink gets too warm. The power output will
not change if you adjust the setting of the BIAS
control.
Page 26
C
ONTROLS
, described later) to enter the
9000
DX
CLASS-A Switch
Pressing this switch engages the Class-A capability
for the transmitter. The power output will be reduced
to a maximum of 75 Watts, and the Bias level may be
adjusted using the BIAS control (#
scribed in the previous section. When Class-A opera-
tion is engaged, the Red LED inside this switch will
light up. Press this switch once more to return to Class
AB operation at a maximum power output of 200
Watts; the Red LED will shut off to confirm Class AB
operation.
A B Switch
Press this button momentarily to transfer data from the
VFO-A frequency (or a recalled memory channel) to
the VFO-B, overwriting any previous contents in the
VFO-B. Use this key to set both VFO-A and VFO-B to
the same frequency and mode.
B A Switch
Press this button momentarily to transfer data from
the VFO-B frequency to the VFO-A, overwriting any
previous contents in the VFO-A. Use this key to set
both VFO-A and VFO-B to the same frequency and
mode.
A B Switch
Pressing this button momentarily exchanges the con-
tents of the VFO-A (or a recalled memory channel)
and the VFO-B.
V/M Switch
This button toggles VFO-A operation between the
memory system and the VFO. Either "VFO," "MEM,"
or "M TUNE" will be displayed to the left of the main
frequency display field to indicate the current selec-
FT 9000 C
DX ONTEST
above), de-
O M
PERATION ANUAL