Epson USN 52L User Manual

Page 72

Krautkramer USN 52R/USN 52L

Issue 05, 02/00

5-27

• The two settings DAC and TCG can only be switched

on if a curve was recorded beforehand, or if a data
set containing a curve was recalled.

REC: Use this setting to prepare the instrument for the
recording of a DAC curve. A curve that possibly already
exists is deleted.

a-START: With this, you can determine the starting
point of the gate (please also refer to function group
GATE). This function is repeated here because it is
required for recording a curve and for the echo evalua-
tion.

DAC ECHO: The DAC ECHO function shows the num-
ber of curve points (reference echoes) and is used in
the recording mode (REC) for recording the next refer-
ence echo.

Operation:

Before starting to record a reference curve, you have to
carry out a correct instrument calibration first. This es-
pecially applies to the functions: RANGE, MTL VEL,
FREQ., RECTIF. and DAMPING due to the fact that a
variation of these functions is no longer possible with
an active DAC or TCG.

DAC/TCG

Operation