Mode 3 Echo Blank; Figure 13-15 Examples Of The Interface Blank In Mode 3 - Olympus 38DL PLUS User Manual

DMTA-10004-01EN, Rev. D, November 2016
Gage reading between back wall 1 and 2
Figure 13‑15 Examples of the interface blank in mode 3
13.8.3

Mode 3 Echo Blank

The echo blank in mode 3 (M3 BLANK) is similar to the interface blank in mode 2 or
to the main bang blank in mode 1. This function creates a blank or dead zone up to
20 µs long following the leading edge of the first detected back-wall echo, to prevent
detection of trailing lobes or cycles of that echo and the resulting gage hang-up (see
Figure 13-16 on page 239).
238 Chapter 13
Interface blank adjusted so gage
measures between back-wall echoes
2 and 3