3. HOW TO SET UP THE EQUIPMENT
3-15
[Bottom Level HF]
The default bottom level setting (0) determines that two
strong echoes received in sequence are bottom echoes. If
the depth indication is not stable in the default setting,
adjust the bottom level here. If vertical lines appear from
the bottom echo in the bottom lock display, lower the
bottom level to erase the vertical lines.
If you can not identify the fish near the bottom from the
bottom echo, increase the bottom level.
[-40] to [40]
[Bottom Level LF]
[Gain Offset HF]
If the gain setting is wrong, or there is a difference in the
gain between the low and high frequencies, you can
balance the gain for the two frequencies here.
[-50] to [50]
[Gain Offset LF]
[Auto Gain Offset
HF]
If the auto gain offset is wrong, or there is a difference in
the gain between the low and high frequencies, set an
offset here to balance auto gain for the two frequencies.
[-5] to [5]
[Auto Gain Offset
LF]
[STC HF]
Adjust the low (LF) or high (HF) STC frequency.
See the operator’s manual for details.
Note:
This menu item is available only for DFF3 and
DFF1-UHD and DI-FFAMP users.
[0] to [10]
[STC LF]
[Frequency Adjust
HF]
Adjust the low (LF) or high (HF) frequency to remove
interference caused by other fish finders operating on the
same frequency as your fish finder.
See the operator’s manual for details.
Note:
This menu item is available only for DFF3 users.
[-50] to [50]
[Frequency Adjust
LF]
[TX Pulse HF]
The pulse length is automatically set according to range
and shift, however it can also be set manually.. Use a short
pulse for better resolution and a long pulse when detection
range is important. To improve resolution on zoom dis-
plays, use [Short 1] or [Short 2].
• [Short 1] improves the detection resolution, but the de-
tection range is shorter than with [Std] (pulse length is 1/
4 of [Std]).
• [Short 2] raises the detection resolution, however detec-
tion range is shorter (pulse length is about 1/2 of [Std])
than [Std].
• [Std] is the standard pulse length, and is suitable for
general use.
• [Long] increases the detection range but lowers the res-
olution (about 1/2 compared to the [Std] pulse length)
Note:
This menu item is available only for DFF3 and DI-
FFAMP users.
[Short1],
[Short2],
[Standard],
[Long]
[TX Pulse LF]
[RX Band HF]
Set the bandwidth for low (LF) or high (HF) frequency. The
RX bandwidth is automatically set according to pulse
length. To decrease noise, select [Narrow]. For better
resolution, select [Wide].
Note:
This menu item available only for DFF3 users.
[Narrow],
[Standard],
[Wide]
[RX Band LF]
[Temperature Port] Set the data source for water temperature.
• [MJ Port]: Use the temperature/speed sensor for data.
• [Low Frequency]: Use the LF sensor for data.
• [High Frequency]: Use the HF sensor for data.
Note:
Available only for DFF3 and DFF1-UHD users.
[MJ Port],
[Low Frequen-
cy], [High Fre-
quency]
Menu item
Description
Options (setting
range)
Summary of Contents for TZT16F
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