Pi Data Output - Simrad ES70 - REFERENCE MANUAL REV A Reference Manual

Simrad ES70
Purpose
This dialog is used to set the operational parameters for detecting single targets.
Parameters
•
Min. Threshold (dB)
to be accepted.
•
Min. Echo Length
(echo length between the 6 dB points relative to the peak value divided by the duration
of the transmitted pulse) must exceed this parameter.
•
Max. Echo Length
be less than the maximum echo length setting.
•
Max. Phase Deviation
echo from a single target must not exceed the maximum phase deviation setting
where maximum phase deviation is set in units of phase steps (128 phase steps = 180
electrical degrees). Recommended setting is 2 to 3 for normal conditions. For weak
echoes in noisy conditions you should allow for more jitter (4 to 10).
•
Max. Gain Compensation
model must not exceed the maximum gain compensation setting. (This is the one-way
maximum gain compensation. The two-way maximum compensation will be 12 dB).
All single targets outside the angle corresponding to the chosen gain compensation are
skipped. Thus you can reduce the sample volume (beam angle) by choosing a lower
value for maximum gain compensation.
•
Min. Echo Spacing
for acceptance.

PI Data Output

The dialog is opened from the
PI Data Output
dialog.
Outputs
186
: The target strength for a single target must exceed this threshold
: For a single target detection to occur the normalized echo length
: A single target detection requires the normalized echo length to
: Average electrical phase jitter between samples inside an
: The correction value returned from the transducer gain
: The is the minimum spacing between two single echoes required
button in the
Configure Output Select
338106/A