Furuno FCV-1900 Operator's Manual page 56

2. SYSTEM MENU
1. Select [Freq Control], then push the ENTER knob.
The [Freq Control] window appears. The contents of the setting window depend
on your system configuration. In the example below, a 200 kHz transducer is con-
nected to the HF terminal and a 50 kHz transducer is connected to the LF terminal.
2. Select the frequency to adjust, then push the ENTER knob.
3. Adjust the frequency, then push the ENTER knob.
The adjustment range is automatically set at installation.
Current setting
4. Press the MENU/ESC key to close the [Freq. Control] window.
Note: [Freq Control] is operative when the transmission mode is [Std] mode.
[TX Pulse Edge] (HF/LF): Turn on to suppress interference to other acoustic equip-
ment (fish finders, scanning sonars, etc.), your own and others.
Note: [TX Pulse Edge] is operative when the ACCU-FISH
transmission mode is [Std] mode.
[TX Pulse] (HF/LF): Pulse width changes according to range and shift values. When
long range detection is your objective select a long pulse length. For better resolution,
select a shorter pulse. [Narrow] raises the detection resolution, however detection
range is shorter. [Std] is the standard pulse length, and is suitable for general use.
[Wide] Increases the detection range but lowers the resolution. [Manual] enables man-
ual setting of pulse length, at [Pulse Length].
Note: [TX Pulse] is operative when the ACCU-FISH
sion mode is [Std] mode.
[Pulse Length] (HF/LF): Operative when [Manual] is selected at [TX Pulse]. A small
value gives better detection resolution, however detection range is shorter. On the oth-
er hand, a large value gives better detection range but resolution is lower.
[RX Band] (HF/LF): Rx bandwidth is automatically set according to [TX Pulse Length].
Normally the [Std] position provides good performance. If noise is a problem switch to
[Narrow]. For better resolution, select [Wide]. [Manual] enables manual setting of Rx
band width, at [RX Band Width].
Note: [RX Band] is operative when the ACCU-FISH
sion mode is [Std] mode.
[RX Band Width] (HF/LF): Operative when [Manual] is selected at [RX Band]. A small
value decreases the noise. On the other hand, a large value gives better resolution.
2-6
Freq Control
200.0kHz(HF)
50.0kHz(LF)
200.0kHz
160.0kHz 217.0kHz
200.0kHz
Freq Control
200.0kHz(HF)
50.0kHz(LF)
191.0kHz
160.0kHz
200.0kHz
217.0kHz
Default setting
™
is deactivated or the
™
is deactivated or the transmis-
™
is deactivated or the transmis-