Humminbird Matrix 20 - Manual (Page 37)

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83 kHz Sensitivity
(Advanced: DualBeam PLUS™and QuadraBeam® Only)
83 kHz Sensitivity changes the sensitivity of the 83 kHz beam. Increasing the 83 kHz
Sensitivity will display additional weak returns and decreasing the 83 kHz Sensitivity
will display fewer weak returns. The 83 kHz Sensitivity menu choice is only available
when User Mode is set to Advanced (see Setup Menu Tab: User Mode).
To set the 83 kHz Sensitivity:
1. Make sure you are in Advanced User Mode, then highlight 83 kHz Sensitivity
on the Sonar main menu.
2. Use the LEFT or RIGHT 4-WAY Cursor Control keys to set the 83 kHz
Sensitivity. (-10 to +10, Default = 0)
455 kHz Balance
(Advanced: QuadraBeam® Only)
455 kHz Balance adjusts the sensitivity of the 455 kHz beam. Increasing the
sensitivity will display additional weak returns and decreasing the sensitivity will
display fewer weak returns. The 455 kHz Balance menu choice is available when
User Mode is set to Advanced (see Setup Menu Tab: User Mode).
To change the 455 kHz Balance setting:
1. Make sure you are in Advanced User Mode, then highlight 455 kHz Balance
on the Sonar Main Menu.
2. Use the LEFT or RIGHT 4-WAY Cursor Control keys to change the 455 kHz
Balance. (-10 to +10, Default = 0)