3. INITIAL SETTINGS
29
[Draft]
: The default depth display shows the distance from the transducer. If you
would rather show the distance from the sea surface, set your ship’s draft. The draft
line for HF and LF can be set respectively.
[Gain ADJ]
: If the gain is too high or too low, or the gain for the low and high frequen-
cies appears unbalanced, you can compensate it here.
[Fish Size]
: Compensate for incorrect indication of fish size. Set the calibration value
according to the connected transducer.
• For a TD-ID transducer: See Note 1.
• For other transducer: See Note 2.
Note 1:
Do the following procedure to open the [TD-ID Information] window, then con-
firm that [NG] does not appear on the window.
1) Referring to section 3.2, open the [Service] menu.
2) Rotate the
ENTER
knob to select [TD-ID Information], then push the knob.
You can capture the [TD-ID Information] window by pressing the
key.
3) Press the
MENU/ESC
key to close the [TD-ID Information] window.
When [NG] does not appear on the [TD-ID Information] window, you can use the TD-
ID information. Open the [Service] menu and select [ACCU-FISH Calib] and [Common
Parameter], then set [swTDIDCalib] to [On]. You can use [Fish Size] for fine adjust-
ment.
If [NG] appears on the [TD-ID Information] window, calculate the calibration value, re-
ferring to Note 2, then enter the value to [Fish Size].
Note 2:
When the data sheet contains the calibration value for low frequency (50 kHz),
enter the value shown on the data sheet. The calibration value is calculated from TVR
and RVR values, using the following formula. For transducers with no data sheet for
comparison, while out to sea, set the calibration ratio by comparing the fish size shown
on the display with the actual fish size.
Airmar Part Number:
Housing style:
Serial number:
Nominal Frequency A:
Lower 3dB Frequency A @20ºC:
Rp @Lower 3dB Frequency A @20ºC:
Upper 3dB Frequency A @20ºC:
Power A:
TVR @ Nominal Frequency A:
RVR @ Nominal Frequency A:
Nominal Frequency B:
Lower 3dB Frequency B @20ºC:
Rp @Lower 3dB Frequency B @20ºC:
Upper 3dB Frequency B @20ºC:
Power B:
TVR @ Nominal Frequency B:
RVR @ Nominal Frequency B:
41-469-1
CM265LH
2877928
50kHz
42kHz
16 Ohms
65kHz
50 watts RMS
+163dB
-178dB
160kHz
130kHz
11 Orms
210kHz
50 watts RMS
+169dB
-182dB
TD-ID Information
Summary of Contents for FCV-1900
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