45
Sector Width & Steer Adjustment
The large front panel rotary knob can be used to both
adjust the sector scanning width and the direction of the
scan. For example, you may not want to scan the full 90
degree sector from the surface ahead to beneath the boat,
but instead only to scan from the surface ahead to a
certain depth below the surface.
Press the soft key labeled “
BEAM
” to bring up a sub-
menu of beam adjustment choices.
By pressing the soft key labeled "
WIDTH
", the rotary
knob can be used to
adjust the scanning sector width.
The actual sector size will be shown on the display
as the
BEAM
width is adjusted.
By pressing the soft key labeled “
STEER
”, the resulting
sector can then be steered throughout the possible 90
degree sector (from directly beneath the boat to the
surface ahead).
The
“
RESET
”
button can be used to quickly select three
popular scanning sectors. If the “
RESET
” button is
pressed once, the
Twinscope
will return to the full 90
degree sector scan (from straight ahead to below the
boat), pressing “
RESET
”
again will put the
Twinscope
into a far forward scan and pressing it a third time will set
select another far forward scan. Each of the far forward
scans is approximately 12 degrees wide.
The
“
RESET
” button cycles through the three possible
scan sectors, as shown at left.
Beam Speed (Resolution)
In it’s normal scanning mode
“NORM”
, the
Twinscope
will send out 50 forward beams and will alternate
between a forward beam and the down-looking beam. In
the
“FAST”
position, only 30 beams will be used and the
Twinscope
will send 5 forward scanning beams for every
down-looking sample. In the
“DETAIL”
mode, the
Twinscope
sends out 90 beams, one every 1 degree for
the maximum resolution, but also at the slowest speed.
RESET
(Full Sector Scan)
RESET
(Far Forward
Sector Scans)
N O R M
N O R M
N O R M
N O R M
Содержание Color Twinscope
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