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JRC JFV-700HP Instruction Manual: Correcting A Water Depth Display Error (sound Speed); Adjusting Gain (gain)

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Correcting a water depth display error (SOUND SPEED)

Depending on underwater conditions, the sound velocity displayed may
slightly deviate from its actual value. If this is the case, the displayed
water depth value will differ from an actual value. Such an error can be
corrected by assigning a sound velocity correction value.
Assign a sound velocity correction value using the following procedure:
Display the FISH FINDER SETTING menu by pressing the
and
keys together.
Move control to "INITIAL SETTING" by pressing the
key, and display the INITIAL SETTING submenu by pressing the
key.
Move control to "CALIBRATION" by pressing the
and display the CALIBRATION submenu by pressing the
Move control to "SOUND SPEED" by pressing the
Assign a sound velocity correction value by pressing the
key.
Example: +10 m/sec (standard sound velocity is 1,500 m/sec).
Press the
Press the
Adjusting gain (GAIN)
The setting of the gain control and the receiver gain can be adjusted.
Adjust gain using the following procedure:
Display the FISH FINDER SETTING menu by pressing the
and
keys together.
Move control to "INITIAL SETTING" by pressing the
key, and display the INITIAL SETTING submenu by pressing the
key.
Move control to "CALIBRATION" by pressing the
and display the CALIBRATION submenu by pressing the
Move control to "GAIN" by pressing the
display the GAIN submenu by pressing the
Select either "HI" (high frequency) or "LO" (low frequency) by
pressing the
Assign a gain correction value by pressing the
Example: A correction value of 5 changes the gain level to 5 with
respect to the GAIN control setting of 0.
Press the
Press the
54 3.OPERATIONS
key to return to the INITIAL SETTING submenu.
MARK
key to return to the fishfinding display.
GRAPH
or
key.
key to return to the INITIAL SETTING submenu.
MARK
key to return to the fishfinding display.
GRAPH
or
or
key,
key.
or
key.
or
or
or
key,
key.
or
key, and
key.
or
key.
FISH FINDER SETTING INITIAL SETTING
INITIAL SETTING
CALIBRATION
CALIBRATION
SOUND SPEED
CALIBRATION
GAIN
High frequency
GAIN

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