Raytheon V8010, Руководство по эксплуатации

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that manual tuning for that particular frequency can now be actu-
ated.
Use the (up) or (down) key to shift the frequency tuning in small
increments. While observing the A-Scope presentation, tune for the maxi-
mum echo strength indications on the display. The bar indicator and the
digital indicator at the right edge of the
show the actual
frequency tuned.
In practice, it’s a good idea to preset the echosounder for the tuning
calibration by
first
selecting control operation in the
DER
menu and then by setting the range scale of the Fishfinding
deep enough to show all of the possible echo returns on the A-scope when
the receiver gain is set to maximum for tuning each frequency.
An example of the manual tuning process for the 200 Khz transmitter
would be to select the STD Fishfinding screen. Verifythe 200 Khz frequency
was in use. Check the Gain A control and verify it is controlling the screen
sensitivity level by rotating the control and observing the echoes and noise
level. Press
and set the range scale to about 150 to 200 feet.
Press the-key, and then
from the menu with the and
Press for tuning the 200Khz transmitter. While watching the
weak echoes at the bottom end of the A-Scope, use the up or down
direction keys to adjust for the maximum number or strongest levels of the
echo returns.
Press the again to return the unit to the tune mode
and verify that after a few seconds in
AUTO
the echoes on the A-Scope
remain at maximumlevels.
3.6.4 Master Reset
The key restores the operating screens to an “operator
preset” condition. The also includes a
MASTER
mode. The
differs from the
CUSTOM
mode in that anytime you
all routes, and event memories and start again
with the original factory set-up conditions, a
MASTER RESET
can be per-
formed, as follows:
OPERATION
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