Olympus 45MG - Figure 10-15 Examples of the Interface Blank in Mode 3; Figure 10-16 Examples of M3 Blank Adjustment; Mode 3 Echo Blank

DMTA-10022-01EN, Rev. C, January 2015
Chapter 10 182
Figure 10-15 Examples of the interface blank in mode 3
10.8.3 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 in order to
prevent detection of trailing lobes or cycles of that echo, and the resulting gage hang-
up (see Figure 10-16 on page 182).
Figure 10-16 Examples of M3 Blank adjustment
Gage reading between back-
wall echoes 1 and 2
Interface blank adjusted so the gage measures
between back-wall echoes 2 and 3
Gage hanging up on trailing edge of back wall 1 M3 BLANK set properly