scrolls the breakpoint index
through points 1 to 40, and
moves the curve pointer left
or right respectively.
And,
changes the bias value of
the breakpoint, -50 to 50
enters the change in value.
P831, TVT shaper, must be ‘on’.
P833 TVT START MIN
Use this feature to adjust the TVT Curve height to ignore false echoes
(or pick up true echoes) near the start of the Echo Profile.
Enter the minimum TVT Curve start point (in dB above 1 uV RMS).
This feature should only be used if increased Near Blanking (P800) would
extend farther than desired into the measurement range.
values: -30 to 225 (preset = 45)
P834 TVT START DURATION
Use this feature in conjunction with TVT Start Min (P833) to ignore false
echoes (or pick up true echoes) near the start of the Echo Profile.
Enter the time (in ms) for the TVT Curve to decrease from the TVT Start
Min (P833) point to the TVT Curve baseline.
values: 0 to 9999 (preset = 30)
P835 TVT SLOPE MIN
Enter the minimum slope (in dB/s) for the middle of the TVT Curve.
This feature (preset to 200) is used in conjunction with TVT Start Duration
(when a long flat TVT Type is selected) to ensure the TVT Curve remains
above false echoes which appear in the middle of the Echo Profile.
Alternatively, if TVT Type is set for "TVT Slopes" (P830 = 6), this value is
preset to 2000. Use this feature to adjust the slope declination, as required.
values: 0 to 9999 (preset = 200)
e.g. oscilloscope displays breakpoint 5,
e.g. breakpoint 5, value
PARAMETERS
PL-507 141
To Next Page
Loading...
