2. Setting Up for Phased Array Measurement
PHASOR XS Operating Manual
Page 29
Remember that gate position has the following effects on
instrument performance:
• The IF Gate provides a reference point from which
the other gates are positioned, and provides a
reference from which the displayed data can be
positioned. No data is collected from IF-Gate
triggering. The range of values that can be input
for the starting point and width of the IF Gate is
influenced by the Z parameter accessed via the
WEDGE GEO Submenu, found in the PROBE
Menu.
• The A-Scan displays echo amplitudes as a function
of distance for all reflected sound waves. When the
gate is moved down (as shown in
Figure 2-12
), the
gated area represents a region that’s deeper into
the test material.
• A wider gate will simply span the equivalent of more
test-material depth
• Increasing the threshold of a gate means that only
reflected signals of sufficiently large amplitude will
cross the gate
NOTE:
A- and B-Gates can be removed from the ac-
tive display by using the GATE DISPLAY Function.
When removed from the display in this manner, the
gate continues to function. The IF Gate’s GATE LOGIC
setting can be turned to OFF, disabling the gate and
removing it from the display. Otherwise, the IF Gate
will always be displayed with turned on.
NOTE:
Gate starting point and width can be adjusted
from the HOME Menu’s function bar. To control IF, A,
or B-Gate from this menu, first select the desired gate
using the GATE SELECT Function (accessed via the
GATEMODE or GATE POS Submenus). The color of
the text in the gate-controlling function box will match
the color of the selected gate.
NOTE:
The IF Gate provides a reference point from
which the other gates are positioned. The A- and B-
Gate starting positions are measured with respect to
IF-Gate trigger whenever the IF-Gate is turned “on”
(meaning its logic setting is set to POSITIVE). See Also
Section 2.6.3.
NOTE:
When operating with the DISPLAY START
Function set to IF, the interface echoes for each beam
are visible on the display. This provides a visual indica-
tion of variation in the IF-Gate triggering point. When
operating in this mode only, the operator is alerted to
the loss of an IF-Gate triggering echo by the application
of a special IF LOSS color to the display.
Setting a Gate’s Starting Point (UT-GATE POS-
GATE START)
Step 1:
Activate the GATE POS Submenu (located in
the UT Menu).
Step 2:
Select the gate to be positioned using the GATE
SELECT function. The color of function-block values
matches the color of the corresponding gate.
Step 3:
Select the GATE START function and adjust the
starting point by turning the Function Knob. Increasing and
decreasing the value of the starting point moves the gate
(in A-Scan view) to the right and left, respectively.
Step 4:
The gate starting point will remain as set, even
when width adjustments are made.
Adjusting a Gate’s Width (UT-GATE POS-GATE
WIDTH)
Step 1:
Activate the GATE POS Submenu (located in
the UT Menu).
Step 2:
Select the gate to be positioned using the GATE
SELECT function.
Step 3:
Select the GATE WIDTH function and adjust by
turning the Function Knob.
Setting a Gate’s Threshold
(UT-GATE POS-GATE THRESHOLD)
Step 1:
Activate the GATE POS Submenu (located in
the UT Menu).
Step 2:
Select the gate to be positioned using the GATE
SELECT function.
Step 3:
Select the GATE THRESHOLD function and
adjust the vertical height by turning the Function Knob.
Increasing and decreasing the value of the thresh-
old moves the gate (in A-Scan view) up and down,
respectively.
Hiding an Active Gate from the Display (UT-GATE
POS-GATE DISPLAY)
An active A- or B-Gate (one whose LOGIC setting is not
set to OFF) can be hidden from the display while continu-
ing to function. To hide a gate from the display:
Step 1:
Active the GATE POS Submenu (located in the
UT Menu)
Step 2:
Select the gate to be hidden using the GATE
SELECT function.
Step 3:
Set the value of GATE DISPLAY to OFF. The gate
will continue to function but will no longer be displayed.
Summary of Contents for Phasor 16/16
Page 6: ...Contents Page 4 PHASOR XS Operating Manual ...
Page 16: ...1 Phased Array Operation Keypad Menus and Displays Page 14 PHASOR XS Operating Manual ...
Page 24: ...2 Setting Up for Phased Array Measurement Page 22 PHASOR XS Operating Manual ...
Page 86: ...5 Making Conventional Measurements Page 84 PHASOR XS Operating Manual ...
Page 92: ...6 Storing Data Sets and Generating Reports Page 90 PHASOR XS Operating Manual ...
Page 96: ...7 Technical Specifications Page 94 PHASOR XS Operating Manual ...
