I Resetting The Cpu; I Frequency Calibration (Approximate) - Icom IC-746PRO Instruction Manual

I Resetting the CPU

When first applying power or when the function does
not seem to be operating normally, reset the CPU as
follows:
q Make sure the transceiver power is OFF.
w While pushing [M-CL] and [F-INP], push [POWER]
for 1 sec. to turn power ON.
• The internal CPU is reset.
• The transceiver displays its initial VFO frequency when
resetting is complete.
e Correct the set mode settings after resetting, if de-
sired.
NOTE: Resetting CLEARS all programmed con-
tents in memory channels and returns programmed
values in set mode to default values.
I 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 sta-
tion WWV, or other standard frequency signals.
CAUTION:
Your transceiver has been thoroughly
adjusted and checked at the factory before being
shipped. You should not calibrate frequencies, ex-
cept for special reasons.
q Push [SSB] to select USB mode.
w Push [PBTC] for 1 sec. to clear the PBT settings
and make sure that the RIT/∂TX function is not ac-
tivated.
e Set the frequency to the standard frequency station
minus 1 kHz.
• When receiving WWV (10.000.00 MHz) as a standard
frequency, set the operating frequency for 9.999.00 MHz.
• Other standard frequencies can also be used.
r Push [MENU] several times to select
necessary.
t Push [MENU] for 1 sec. to select the set mode
screen.
y Push [F1 ≤] or [F2 ≥] several times to select the
item.
u Rotate the tuning dial clockwise to turn the calibra-
tion marker ON.
• Side tone may be heard.
i Adjust [CAL] pot on the rear side of the transceiver
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 emitted.
o Rotate the tuning dial counterclockwise to turn the
calibration marker OFF.
!0 Push [MENU] to exit set mode.
[POWER]
(approximate)
[RF/SQL] [AF] [P.AMP/ATT]
or , if
• Calibration marker item
MAINTENANCE
[MENU] [SSB]
[CAL]
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[F-INP] [M-CL]
[PBTC]
[RIT] [CLEAR]
94