About the receiver filter sequence in the
ST90
system
The filters in the
ST90
system are implemented in “series”.
Any changes to a filter setting may therefore have an effect on subsequent filters.
A
Bottom Filter
B
Noise Filter
(1)
C
Gain
&
TVG (Time Variable Gain)
D
Noise Filter
(2)
E
AGC (Automatic Gain Control)
F
RCG (Reverberation Controlled Gain)
G
Display Gain
H
Ping-Ping Filter
Note that
Gain
,
TVG
(Time Varied Gain) and
Display Gain
are not filters, but included only to illustrate the complete "signal path".
Related topics
Operating procedures
Improving the recognition of fish and schools using receiver filters
Reducing noise and reverberation with the AGC (Automatic Gain Control) function
Reducing propeller noise and interference with the Noise Filter
Reducing bottom and surface reverberation with the RCG (Reverberation Controlled Gain) function
Reducing noise and false echoes with the Ping-Ping Filter
Reducing the strong bottom echo to see fish close to the seabed
Adjusting the intensity of the echo presentations