return to the CALIBRATION menu or
to return to the previous
display mode.
3.632
Calibrate
SPEED
If you have pressed
to
calibrate the paddlewheel speed value, just press
the[
Then press the (up)
or
(down) keys to match the numbers in
speed data CALIBRATE with the GPS reference
value. The GPS SOG readout is displayed as the
REF SPD
for
your convenience.
Once the desired
SPEED
calibration value is set,
press
to return back to the previous dis-
play mode or
return to the
CALIBRATION menu if you wish to tune the TX
frequencies.
TEMP DATA
CALIBRATE
66.6
DATA 10.2
CALIBRATE
9.
REF. SPEED 10.3
PAGE
3.633 Calibrate TX
The
includes a means for the operator to verify and manually
calibrate the transmitting frequencies of the echosounder to the transducer
for optimum performance. Normally, the echosounder tests the tuning
conditions during regular operation and adjusts the
TX
as required.
On the
CALIBRATION
menu select
FF
with the
The
CAL FREQUENCY
menu appears on the screen.
The first item on the
enables the
Automatic Transmitter Frequency
fea-
ture. Generally this selection will be in
AUTO .
To
the frequency tuning for any
frequency, press the
to select the
200Khz frequency for manual tuning.
to select the
frequency for tuning.
the same
to toggle the selection to
to select the 28Khz frequency for tuning. The
TU
NE selector will switch
the selected
frequency number will be displayed in amber
PAGE
RETURN
OPERATION
110
