Frequency Calibration (Approximate) - Icom IC-7700 Instruction Manual

■ Frequency calibration
/
∫ ACC √ OTHERS
F-1 F-2
• Calibration marker item
• REF Adjust item
(approximate)
Main dial
EXIT/SET
SET
F-5 F-7
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-7700 has been thoroughly ad-
justed and tested at the factory before being
shipped. You should not have to re-calibrate it.
q Push
to select USB mode.
SSB
w Push and hold
PBT setting and make sure that the RIT/∂TX func-
tion is not activated.
e Set the frequency to the standard frequency station
minus 1 kHz.
• When receiving WWV or WWVH (at 15.00000 MHz) as
a standard frequency, set the operating frequency for
14.99900 MHz.
• Other standard frequencies can be used.
r Push
EXIT/SET
tion screen, if necessary.
t Push [SET]
F-7
y Push [OTHERS]
u Push [Y]
F-1
tion Marker" item.
i Rotate the main dial clockwise to turn the calibra-
tion marker ON.
o Push
EXIT/SET
screen.
!0 Push [ACC]
F-2
!1 Push [Z]
F-2
just" item.
!2 Rotate the main dial to adjust for a zero beat with
the received standard signal as shown at left.
• Zero beat means that two signals are exactly the same
frequency, resulting in a single tone being emitted.
!3 Turn the calibration marker OFF in Others set
mode.
!4 Push
EXIT/SET
13-5
MAINTENANCE
for 1 sec. to clear the
PBT-CLR
several times to close a multi-func-
to select set mode menu screen.
to enter Others set mode.
F-5
several times to select the "Calibra-
once to return to set mode menu
to enter accessory set mode.
several times to select the "REF Ad-
twice to exit set mode.
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