Epson USN 52R, USN 52L manual Recording a Distance- Amplitude Curve

Operation Recording a Distance-Amplitude Curve

5.5Recording a Distance- Amplitude Curve

AAttention:

Recording of a new curve will delete a curve that possi- bly already exists. If necessary, make sure that the old curve is stored in a free data set before you start re- cording a new curve!

Use Cto go to the function group DAC.

–Press the JC keys simultaneously to switch the DAC/TCG function to the record mode: DAC/TCG = REC.

–The DAC ECHO function is at 0 as no echo has been recorded yet.

–Couple the probe to the reference block and peak the first reference echo. Bring the echo with Gain to about 80% screen height.

–Move the gate onto the corresponding echo with a-START. The gate threshold must be adjusted so that the echo exceeds it.

–Switch on DAC ECHO now:

All reference echo data (sound path, amplitude and gain setting) are stored in the instrument, and the DAC ECHO function shows the number 1.

–Peak the next reference cho.

–Position the gate onto the echo and readjust the gain if required until the echo exceeds the threshold.

–Switch on the DAC ECHO:

The data of the second echo are stored - DAC ECHO = 2.

You will now already recognize that there is a curve between the amplitude of the first echo and the gain- corrected amplitude of the second echo.

5-28 Issue 05, 02/00 Krautkramer USN 52R/USN 52L