179
17
MAINTENANCE
■
Frequency calibration
(approximate)
[PBT-CLR]
[
AF
]
(MAIN Band)
[
RF/SQL
]
(MAIN Band)
[
∂TX
]
[
RIT
]
[
MENU
] [
SSB
]
[P.AMP÷ATT]
[
√
]
[
∫
]
[MAIN DIAL]
Ù
6 8
Ú
O F F
S E T
C a l i b r a t i o n M a r k e r
Ù
6 9
Ú
5 0 %
S E T
R E F A d j u s t
• Calibration marker item
• REF Adjust item
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 sta-
tion WWV, WWVH, or other standard frequency sig-
nals.
CAUTION:
The IC-9100 has been thoroughly ad-
justed and tested at the factory before being
shipped. You should not have to re-calibrate it.
q
Push [SSB] to select the USB mode.
w
Push [PBT-CLR] for 1 second to clear the PBT set-
tings and make sure that the RIT/
∂
TX function is
not turned ON.
e
Set the frequency to the standard frequency station
minus 1 kHz.
•
When receiving WWV or WWVH (at 15.000.00 MHz) as
a standard frequency, set the operating frequency for
14.999.00 MHz.
• Other standard frequencies can also be used.
r
Hold down [MENU] for 1 second to enter the Set
mode.
t
Push [
Y
](F-1) or [
Z
](F-2) to select “Calibration
Marker.”
y
Rotate [MAIN DIAL] to turn ON the calibration
marker.
• A sidetone may be heard.
u
Push [
Z
](F-2) to select “REF Adjust.”
i
Rotate [MAIN DIAL] to adjust for a zero beat with
the received standard signal.
• Zero beat means that two signals are exactly the same
frequency, resulting in a single tone being heard.
o
Push [
Y
](F-1) to select “Calibration Marker.”
!0
Rotate [MAIN DIAL] to turn OFF the calibration
marker.
!1
Push [MENU] to save, and exit the Set mode.
The tuning tension of [MAIN DIAL] may be adjusted to
suit your preference.
The tension adjustment is located on the bottom side
of the front panel. See the figure to the right.
Slide the tension adjustment to a comfortable level
while turning the dial continuously and evenly in one
direction.
MAIN DIAL
Tuning tension
adjustment
Light
Firm
■
Main dial tuning tension adjustment
