Maintenance And Adjustment; E Frequency Calibration (Approximate); We Main Dial Brake Adjustment - Icom IC-775DSP Instruction Manual

—E:
MAINTENANCE AND ADJUSTMENT
E Frequency calibration (approximate) P-set mode
A very accurate frequency counter is required to
CAUTION: Your transceiver has been thor-
oughly adjusted and checked at the factory
before being shipped. You should not calibrate
frequencies, except for special reasons. |
Push [SSB] to select USB mode. Make sure the
[TWIN PBT] controls are set to the center posi-
tion.
CG) Set the frequency to the standard frequency
station minus 1 kHz. .
- When receiving WWV (10.000.00 MHz) as a stan-
dard frequency, set the operating frequency for
9.999.00 MHz.
- Other standard frequencies can also be used.
CG) Push [SET] momentarily to enter P-set mode.
@ Push [AUP]/[VDOWN] one or more times to
select "CAL" display.
- When a sub setting display is selected, push [ENT]
to exit.
W Main dial brake adjustment |
The tension of the main dial may be adjusted to suit
your preference.
The brake adjustment screw is located under the
rubber grip of the main dial. See the figure at right.
j
i
f
W
1
d
|
L
f
f
R
DN
H
1
D
|
|
i
, Turn the brake adjustment screw clockwise or
l counterclockwise to obtain a comfortable tension
level while turning the main dial continuously and
evenly in one direction.
©) Rotate the main dial clockwise to turn the calibra-
tion marker ON. l
- Side tone may be heard.
LIT) . PAL
© Adjust the calibration pot on the right side panel
of the transceiver for making 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.
@) Rotate the main dial counterclockwise to turn the
calibration marker OFF in P-set mode.
Push [ENT] to exit P-set mode.