25
6
When complete select FINISH and press
key and follow the on-screen prompts to finish
the editing.
Creating DAC Offset Curves
When operating with DAC turned on, three DAC curves including RL, SL and EL are typically displayed.
The three curves can be offset from the original DAC curve (ML) by a user-inputted amount.
1
Select the function DAC-RL (or
DAC-SL, DAC-EL) located in the OFFSET
submenu.
2
Change the offset value by means of
the knob.
The offset range from -50dB to 50dB.
Specifying the DAC Reference Curve
Once the DAC curve is recorded and displayed (if not displayed, switch on by turning DAC DISP on),
echoes are automatically compared to the size reference curve, which can be specified in the SIZE REF
selection. The options include RL, SL, EL, and ML.
The dB equivalent height of the signal above or below the corresponding DAC Reference Curve
amplitude is displayed as a comparison result.
The comparison result is shown as right
figure.
Note that the result is like: RL-1.2. It means
that the peak echo height inside selected
gate is -1.2 dB offset to the DAC-RL line.
Deleting a DAC Curve
To delete a stored DAC curve
1
With the DAC menu activated, select the DEL submenu.
2
Select the DEL DAC function.
3
Press
key or turn the knob. Then confirm your operation.
Turning On/Off the DAC display
Turning DAC DISP On and Off causes the DAC curves to be displayed or removed.
1
With the DAC menu activated, select the DISPLAY submenu.
2
Select the DISP DAC function.
3
Press
key or turn the knob to turn On/Off the DAC display.
Note that if the DAC curve is not created, it will prompt out “No DAC curve found” and DAC DISP will be
set to OFF.
