The processed echo display (P-79) can be made to show not only the processed echo
profile, but also the:
•
echo marker
•
window
•
TVT curve or auxiliary window
Typical scope settings for viewing the processed echo are:
•
gain - 1 v/div
•
sweep - 1 mSec/div
Note: - the following is restricted to transmission in air at 20°C.
•
to obtain a time measurement of the processed echo, the sweep time must
be multiplied by a factor of 10.
•
to obtain a time measurement of the transmit or receive signal, use the
actual sweep setting.
•
to obtain a distance measurement of either of the above types of echoes,
divide the respective time measurement by 1.8 mSec/ft or 5.9 mSec/m.
PL-399 8 — 2
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