Lowrance Elite-7x, Руководство по эксплуатации

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17 Sonar Operation | Elite-7x
Sonar Operation | Elite-7x
Frequency
Controls the transducer frequency
used by the unit. This unit supports
three conventional sonar frequencies:
50kHz, 83kHz and 200kHz.
200 kHz has the highest sensitivity and best target
discrimination in shallow water. 83 kHz offers a
wider cone angle for more water coverage.
NOTE:
You can make minor (+/-4%)
changes to sensitivity with Auto Sensitivity
turned on. You will have to turn it off to
make significant adjustments.
Range
Selects the deepest range shown on
the display. Range settings display the
section of the water column from the
water surface to the selected depth
range.
If you select too shallow a depth range, the unit will
not be able to lock onto the bottom.
Custom Range — Upper and Lower Limits
Used to select the upper limit and lower limit of
a section of the water column. That allows you to
view a section of the water column that does not
include the water surface. Upper and lower limits
must be at least 6.5 ft (2m) apart.
Custom range menu
nOTe
: When using a custom range, you
may not receive any digital depth read-
ings, or you may receive incorrect depth
information.