Garmin GPSMAP 541s Owner's Manual - Page 60

Range, Manual Range, Manual, frequencY, 200kHz, 50kHz, No Zoom, bottom Lock, Split Zoom, Noise Reject - dual frequency transducer

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Using Sonar Range-adjust the range of the depth scale on the right side of the screen (Auto, or to adjust manually, Manual Range). Gain-controls the sensitivity of the sonar receiver (Auto, or to adjust manually, Manual). To see more detail, increase the gain. If the screen is cluttered, decrease the gain. Frequency-when using a dual frequency transducer, select how the frequencies appear on-screen (200kHz, 50kHz, Dual, or Auto). Zoom-zoom in to a section of the full screen. The zoom is off, or set to No Zoom by default. Four options are available: • No Zoom-turns zooming off. • 2x Zoom-twice the magnification. • 4x Zoom-four times the magnification. • Bottom Lock-locks the zoom window to the bottom. • Split Zoom-displays the Split Zoom screen (page 51). Noise Reject (available only when Gain is set to Manual)-reduces on-screen visual clutter (usually from electrical sources) on the screen. Select the top slider bar to manually adjust the value of noise rejection. Manually adjusting the amount of noise that is rejected helps fine-tune the sonar to show the most detail with the least noise. When Frequency is set to Dual (and Gain is set to Manual), you can individually adjust noise rejection for each frequency. 54 GPSMAP 400/500 Series Owner's Manual

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54
GPSMAP 400/500 Series Owner’s Manual
Using Sonar
Range
—adjust the range of the depth scale on the right side of the
screen (
Auto
, or to adjust manually,
Manual Range
).
Gain
—controls the sensitivity of the sonar receiver (
Auto
, or to
adjust manually,
Manual
). To see more detail, increase the gain. If
the screen is cluttered, decrease the gain.
frequencY
—when using a dual frequency transducer, select how
the frequencies appear on-screen (
200kHz
,
50kHz
,
dual
,
or
Auto
).
Zoom
—zoom in to a section of the full screen. The zoom is off, or
set to
No Zoom
by default. Four options are available:
•
No Zoom
—turns zooming off.
•
2x Zoom
—twice the magnification.
•
4x Zoom
—four times the magnification.
•
bottom Lock
—locks the zoom window to the bottom.
•
Split Zoom
—displays the Split Zoom screen (
page 51
).
Noise Reject
(available only when
Gain
is set to
Manual
)—reduces
on-screen visual clutter (usually from electrical sources) on the
screen. Select the top slider bar to manually adjust the value of noise
rejection. Manually adjusting the amount of noise that is rejected
helps fine-tune the sonar to show the most detail with the least noise.
When
frequencY
is set to
dual
(and
Gain
is set to
Manual
),
you
can individually adjust noise rejection for each frequency.