Lowrance HDS-7 Carbon Operators Manual EN - Page 72

Stop sonar, Advanced options, Noise rejection, Surface clarity, Scroll speed, Ping speed

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the image as vertical lines. To avoid this, set one transducer at one frequency range (such as Medium CHIRP) and the other transducer at a different frequency range (such as High CHIRP) using the Frequency menu option. Stop sonar Select the Stop sonar menu option to stop the sonar from pinging. Use the stop sonar option anytime you want to disable the sonar but not power off the unit. Advanced options The Advanced option is only available when the cursor is not active. Noise rejection Signal interference from bilge pumps, engine vibration and air bubbles can clutter the image. The noise rejection option filters the signal interference and reduces the on-screen clutter. Surface clarity Wave action, boat wakes, and temperature inversion can cause onscreen clutter near the surface. The surface clarity option reduces surface clutter by decreasing the sensitivity of the receiver near the surface. Scroll speed You can select the scrolling speed of the image on the screen. A high scroll speed updates the image fast, while a low scroll speed presents a longer history. Ú Note: In certain conditions it may be necessary to adjust the scroll speed to get a more useful image. Such as adjusting the image to a faster speed when vertically fishing without moving. Ping speed Ping speed controls the rate the transducer transmits the signal into the water. By default, the ping speed is set to max. It may be necessary to adjust the ping speed to limit interference or to adjust for specific fishing conditions. 72 Sonar | HDS Carbon Operator Manual

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the image as vertical lines. To avoid this, set one transducer at
one frequency range (such as Medium CHIRP) and the other
transducer at a different frequency range (such as High CHIRP)
using the Frequency menu option.
Stop sonar
Select the
Stop sonar
menu option to stop the sonar from pinging.
Use the stop sonar option anytime you want to disable the sonar
but not power off the unit.
Advanced options
The Advanced option is only available when the cursor is not active.
Noise rejection
Signal interference from bilge pumps, engine vibration and air
bubbles can clutter the image.
The noise rejection option filters the signal interference and reduces
the on-screen clutter.
Surface clarity
Wave action, boat wakes, and temperature inversion can cause
onscreen clutter near the surface. The surface clarity option reduces
surface clutter by decreasing the sensitivity of the receiver near the
surface.
Scroll speed
You can select the scrolling speed of the image on the screen. A
high scroll speed updates the image fast, while a low scroll speed
presents a longer history.
Ú
Note:
In certain conditions it may be necessary to adjust the
scroll speed to get a more useful image. Such as adjusting the
image to a faster speed when vertically fishing without moving.
Ping speed
Ping speed controls the rate the transducer transmits the signal into
the water. By default, the ping speed is set to max. It may be
necessary to adjust the ping speed to limit interference or to adjust
for specific fishing conditions.
72
Sonar
| HDS Carbon Operator Manual