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3. VERTICAL FAN MODE
3-7
3.10
Applying Proper TVG
The TVG function is the same as the one explained in the sonar mode. For best re-
sults, set both TVG level and time a little lower than the ones in the sonar mode. The
setting is mode on the BOTTOM/3D menu screen and the usual setting for both time
and level is 3.
TVG level rejects surface noise, which may mask shallow targets and TVG time adjust
the effective depth.
3.11
Rejecting Interference and Noise
While observing the picture, you may encounter occasional or intermittent noise and
interference as shown below. This is mostly caused by onboard electronic equipment,
engine, propeller noise, or electrical noise from other sonars being operated nearby.
Turn on the interference rejector (IR) in the SONAR menu to reduce or eliminate the
interference.
Level too low
Proper
Level too high
Time too high
R→
↓
Turn on the [IR] on
the SONAR menu,
this mark apears
Interference noise
(angle: 6º)
R→
↓
Turn on the
[IR] function
Summary of Contents for CH-37BB
Page 1: ...COLOR SECTOR SCANNING SONAR CH 37BB OPERATOR S MANUAL www furuno com Model ...
Page 10: ...SYSTEM CONFIGURATION viii This page is intentionally left blank ...
Page 40: ...3 VERTICAL FAN MODE 3 12 This page is intentionally left blank ...
Page 44: ...4 3D MODE 4 4 This page is intentionally left blank ...
Page 48: ...5 PRESENTATION MODE 5 4 This page is intentionally left blank ...
Page 52: ...6 CUSTOM MODE KEYS 6 4 This page is intentionally left blank ...
Page 58: ...7 SYSTEM MENU 7 6 This page is intentionally left blank ...
Page 66: ...8 MAINTENANCE 8 8 This page is intentionally left blank ...