Specifications

11. Using DAC/TCG
Page 70 USN52 L Operating Manual
10.4 Frozen Screen Evaluation
If either gate start, threshold, or width is modified while the
A-scan is frozen, the movable-gate screen freeze mode (be-
hind the freeze) is entered. When this mode is selected, a
gate bar will appear under the freeze symbol.
When the screen is placed in freeze mode, gate start, gate
width, and gate threshold (and their remote commands) will
continue to function while allowing the screen to remain in
freeze mode.
Other gate parameters such as TOF mode or gate logic mode
will function as before and will kill freeze mode if changed.
Measurement line values will be updated to reflect changes
in the position of the gate or gates. The resolution of the time
of flight measurement will be the range divided by 200 in
normal A-scan mode.
In RF mode, when moving the gates with a frozen screen,
the amplitude display on the measurement line will be lim-
ited to values below 50% screen height. If the amplitude is
greater than 49%, the measurement line will indicate “> 49%.”
10. Using the Flaw Alarm / Measurement Gate