System-Dff/Fcv Menu - Furuno MFD12 Operator's Manual

13. How to Adjust Settings
13.5.4

System-DFF/FCV Menu

Transmission: Turn the transmission on or off. Leave on normally.
Transmission Power: Interference can appear on the screen when the fish finder on
your vessel and another vessel have the same TX frequency. To prevent this interfer-
ence, lower your TX power and ask the other vessel to lower their TX power. The TX
power is available in Off, Min, 1-10, and 10 provides the highest TX power.
Gain Adjust HF (LF): 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 frequen-
cies here.
Auto Gain Offset HF (LF): 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.
Bottom Level HF (LF): The default bottom level setting (0) takes that two strong ech-
oes 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
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