３－8
FUNCTION SETTINGS
4. PULSE WIDTH
The transmitted pulse width can be set.
z
The transmitted pulse can be set to these three (narrow, normal, wide), where the
optimum setting will be applied according to the range automatically.
z
Or it can be set manually, if a specific pulse width (0.1
～
3.6 msec) is required.
z
Each press of [
←
] or [
→
] key changes the setting, "NARROW, NORMAL, WIDE, 0.3ms."
z
Select the desired value, and then press the Enter key.
NORMAL
:
Setting NORMAL changes automatically according to the range.
NARROW
:
When the searching range is short and higher resolution is required,
the pulse width should be set NARROW.
WIDE
:
The longer range gives less resolution.
CONSTANT
:
The initial value of the pulse width is 0.3 ms. The pulse width is to
be set every 0.1 ms unit from 0.1 to 3.6 ms.
z
Use [
↑
] key to select the larger value.
z
Use [
↓
] key to select the smaller value.
NOTE !---------------------------------------------------------------------------------------------------------
In actual practice, the shorter pulse (narrower) gives better resolution, and
Less noise in shallow water or surface scanning. The longer pulse (wider)
will reach deeper but give less resolutions.
----------------------------------------------------------------------------------------------------------------------
5. TX POWER
The output power of the ultrasonic sound wave may be selected.
z
In crowded fishing areas, this function may be used to reduce power and avoid
interference to other Fishing boat's Sonars and Echo Sounders.
z
Each press of [
←
] or [
→
] key change the setting, "LOW or HIGH."
z
Select the desired level of the transmitting power, and then press the Enter key.
