Installation manual

Simrad SH80

Frequency: On the SH80 you can alter the sonar ’s transmission

frequency. This is very useful to eliminate interference from

other equipment on board, or from other vessels in the vicinity.

(► Frequency on page 122)

TVG: Time Varied Gain. This function will automatically adjust

the gain in the sonar to c ompensate for geometric spread and

absorption. Note that the TVG will only work within t he ﬁrst

1000 meters. (► TVG on page 164)

Noise Filter: This function allows you to control the built-in ﬁlter

designed to remove unwanted acoustic noise from the sonar

picture. (► Noise Filter on page 134)

RCG: Reverberation Controlled Gain. This function will

automatically remove unwanted reverberation from the bottom

or from the sea surface. It may however also remove scattered

ﬁsh. (► RCG on page 143)

PP Filter: The Ping-to-Ping ﬁ lter will only show you the echoes

if they are still present after several consecutive pings (2, 4

or 8). This function will provide you with a more stable echo

presentation, as spurious echoes will be suppressed. (► PP

Filter on page 138)

Noise Level: This button presents a value for the noise in the

cursor beam. This information is used during noise tests.

(► Noise Level on page 135)

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