Tuning Dial Brake Adjustment; Frequency Calibration (Approximate) - Icom IC-756PROIII Instruction Manual

15
MAINTENANCE

■ Tuning dial brake adjustment

The tension of the tuning dial may be adjusted to suit
your preference.
The brake adjustment screw is located on the right
side of the tuning dial. See the figure at right.
Turn the brake adjustment screw clockwise or coun-
terclockwise to obtain a comfortable tension level
while turning the dial continuously and evenly in one
direction.
■ Frequency calibration
A very accurate frequency counter is required to cali-
brate the frequency of the transceiver. However, a
rough check may be performed by receiving radio
station WWV, or other standard frequency signals.
CAUTION:
oughly adjusted and checked at the factory before
being shipped. You should not calibrate frequen-
cies, except for special reasons.
q Push [SSB] to select USB mode.
w Push [PBT CLR] for 1 sec. to clear the PBT set-
tings and make sure that the RIT/∂TX function is
not activated.
e Set the frequency to the standard frequency sta-
tion minus 1 kHz.
• When receiving WWV (10.000.00 MHz) as a standard
frequency, set
9.999.00 MHz.
• Other standard frequencies can also be used.
ANT ANT
BW BW 2.4k 2.4k
1
TX T X VFO VFO
METER METER
Po Po
1
r Push [EXIT/SET] several times to close a multi-
function screen, if necessary.
t Push [EXIT/SET] for 1 sec. to select the set mode
screen.
y Push [(F-5)OTHERS] to enter miscellaneous (oth-
ers) set mode.
109
(approximate)
Your transceiver has been thor-
the operating frequency
qw:pp
0
SFT SFT
qw:pp
U S B U S B
FIL2 FIL2
o.ooo.pp
14.100.00 14.100.00 USB USB
u Push [(F-1)Y Y ] several times to select the "Calibra-
tion marker" item.
i Rotate the tuning dial clockwise to turn the calibra-
tion marker ON.
• Side tone may be heard.
AGC AGC
MID MID C a l i b r a t i o n Ca li bra ti on M a r k e r
B e e p ( C o n f i r m a t i o n ) Be ep (Co nf irm at ion )
B e e p ( B a n d Be ep (Ba nd E d g e )
BK-IN BK-IN
OFF OFF
RF /S QL C o n t r o l R F / S Q L
Qu ic k D u a l w a t c h Q u i c k
Qu ic k S P R I T Q u i c k
1/4 1/4
OFF OFF
FM S P L I T F M S PLI T O f f s e t ( H F )
é
o Adjust the calibration pot on the right side panel of
the transceiver for a zero beat with the received
standard signal as shown below.
• Zero beat means that two signals are exactly the same
frequency, resulting in a single tone being emitted.
for
!0 Rotate the tuning dial counterclockwise to turn the
calibration marker OFF.
!1 Push [EXIT/SET] twice to exit set mode.
O T H E R S O THE RS S E T S ET
Ma rk er ON O N
ON O N
E dge ) O N ON
Co nt rol R F + S Q L RF +S QL
D ua lwa tc h O N ON
S PR IT ON O N
Of fse t( HF) -0 .1 00M Hz - 0 . 1 0 0 M H z
è DEF DEF WIDE WIDE