Frequency CalBratOn (ApproxMate) - Icom IC-7600 Instruction Manual

11
MAINTENANCE
■ Frequency calibration
A very accurate frequency counter s requred to cal-
brate the frequency of the transcever. However, a
rough check may be performed by recevng rado
staton WWV, WWVH, or other standard frequency
sgnals.
CAUTION: The IC-7600 has been thoroughly
adjusted and tested at the factory before beng
shpped. You should not have to re-calbrate t.
q Push [SSB] to select USB mode.
w Push and hold [PBT-CLR] for 1 sec. to clear the
PBT settng and make sure that the RIT/∂TX func-
ton s not actvated.
e Set the frequency to the standard frequency staton
mnus 1 kHz.
• When recevng WWV or WWVH (at 15.00000 MHz) as
a standard frequency, set the operatng frequency for
14.99900 MHz.
• Other standard frequences can be used.
r Push [EXIT/SET] several tmes to close a mult-
functon screen, f necessary.
t Push [SET] (F-6) to select set mode menu screen.
y Push [OTHERS] (F-5) to enter others set mode.
u Push [Y ] (F-1) several tmes to select the
"Calbraton Marker" tem.
i Rotate the man dal clockwse to turn the calbra-
ton marker ON.
o Push [EXIT/SET] once to return to set mode menu
screen.
!0 Push [ACC] (F-2) to enter accessory set mode.
!1 Push [Z] (F-2) several tmes to select the "REF
Adjust" tem.
!2 Rotate the man dal to adjust for a zero beat wth
the receved standard sgnal as shown at rght.
• Zero beat means that two sgnals are exactly the same
frequency, resultng n a sngle tone beng emtted.
!3 Turn the calbraton marker OFF n others set
mode.
!4 Push [EXIT/SET] twce to ext set mode.
147
(approximate)
• Calibration marker item
• REF Adjust item
SET
OTHERS
F-5 F-6
F-1 SSB F-2 EXIT/SET
ACC /
PBT-CLR
Main dial