Interphase Twinscope Operation Manual page 60

Beam Width & Steer Adjustment
The large front panel rotary knob can be used to both
adjust the beam scanning sector width and the
direction of the scan. For example, you may only
want to scan the area to the port (left) or starboard
(right) side of the boat.
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 horizontal sector .
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 horizontal sector scan , pressing RESET
again will put the Twinscope into one of two
preprogrammed forward sector scans as shown at
right.
Beam Speed (Resolution)
In its 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 maximum
resolution, but also at the slowest speed.
RESET
(Full Sector
Scans)
RESET
(Forward
Sector Scans)
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