selected, the transmit
pulse length
would be: 525 + 200 = 725
micro-seconds. We added the ini-
tial transmit
pulse of 525 micro-
seconds which is listed in the
initial transmit
pulse
chart, to 200
micro-seconds, which is Sup-
pressor level 3, according to the
Discrimination - Suppressor chart.
So the total initial transmit
pulse
length is 725 micro-seconds. Now,
if we want,
we can increase the
PAPER SPEED CONTROL
This key adjusts
the speed of
the chart paper. Its range is 0 to 7.
When the X-16 is first turned
on,
the paper speed is set to level 5.
This setting is good for detailed
graphs, in shallow to medium
depths when trolling.
It will show proper fish arches at
low speeds and keeps high speed
information from being com-
pressed. The paper speed should
be turned down when using
the
unit in deep water. This will pre-
vent gaps
from appearing in the
record. In fact, the microcomputer
will automatically slow the max-
imum speed of the chart paper
when operating in deep water.
To change the speed of the
chart paper, simply press the new
level desired, from 0 to 7, then
press the PAPER SPEED key. The
paper speed should change
immediately.
Remember, if
gaps in the record
appear,
turn the
paper speed
down until a solid record is
achieved. The paper speed may
also be slowed when not looking
for fish or to simply conserve
paper. If heavy printing, or "over-
strike" occurs, turn the paper
speed up. Overstrike happens
when the paper
moves too slow
past the stylus, which causes the
stylus to print over a large portion
of the previous mark. This makes
heavy, black marks on the chart
paper. Usually, the easiest
way to
solve this problem is to turn the
paper speed up. However,
Alter-
nate Transmit and Print or the
Paper Save function listed in the
Advanced Operation section in this
manual, may help also.
GRAYLINE CONTROL
The GRAYLINE function can be
SUPPRESSOR LEVEL INITIAL TRANSMIT PULSE INCREASE
(micro-seconds)
0 AUTOMATIC
1 0
2 100
3 200
4 330
5 450
6 600
7 800
the digital shows
up on the X-16
• (random short lines running ver-
tically across the paper), then
increase the Discrimination level
until they are gone.
To use the Discrimination func-
tion, simply press the level of
noise rejection desired, from 0 to
4, then the Disc (Discrimination)
key. There should be an immedi-
ate change in the amount of noise
present on the paper. The Discrim-
ination setting is printed at the
bottom of the paper
each time the
level is entered and at intervals
thereafter. When the X-16 is
shipped from the
factory, the Dis-
crimination level is set to 1.
The Discrimination function can
be disabled at any time by press-
ingO-DISC.
Example: Enter a Discrimination
level of 4.
IF INITIAL TRANSMIT PULSE LENGTH IS LESS THAN 500 MICRO-
SECONDS:
DISCRIMINATION LEVEL SUPPRESSOR LEVEL
0 1
1
2 2
3 3
4 4
IF INITIAL TRANSMIT PULSE LENGTH IS GREATER THAN 500
MICRO- SECONDS:
DISCRIMINATION LEVEL SUPPRESSOR LEVEL
0 1
1 2
2 3
3 4
4 5
FIGURE 7 ----0.0--—
is automatically increased when
the Discrimination level is
increased. This is done for better
noise rejection. The
following chart
shows the relationship
between
Suppression and Discrimination.
Remember,
Suppressor value 1
adds nothing to the initial transmit
pulse length.
In other
words, if the lower limit
selected was 525 feet and a
Discrimination level of 2 was
PRESS: 4 - DISC FIGURE 8
—nfl ———-— — — — ——__________
-
12.0 • 12.0
24.0 fl' --
• ' • -•
48,0
22 7
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