Recording A Reference Echo; Deleting A Reference Echo - GE USM 36 Series Technical Reference And Operating Manual

5 Operation

Recording a reference echo

Before using the dB-difference measurement, you have
to first record a reference echo.
If a reference echo has already been stored, you have
to first delete it before recording a new reference echo
(please see section below).
– Peak the reference echo according to the test instruc-
tion.
– Use the function A-start to position the gate A on the
reference echo.
– Select the function RECORD and press one of the
selector keys. The reference echo is recorded and
stored.
5-38
dB-difference measurement (function group dB REF)

Deleting a reference echo

You can delete a stored reference echo at any time.
– If necessary, select the function DELETE REF and
press one of the selector keys to delete the stored ref-
erence echo.
– Press one of the selector keys for 3 seconds to con-
firm the deletion.
Issue 2 (12/2013) USM 36