Panametrics DigitalFlow GC868, Programming Manual, Page: 54 / 134

Chapter 2. Displaying Data
2-9 DigitalFlow™ GC868 Programming Manual (2-Channel)
The signal graph is a plot of signal amplitude (y-axis) vs. time in microseconds
(x-axis). When the SIGNL display screen first appears, it may briefly remain blank. As
soon as the signal is acquired, processed and loaded into the display memory, the
graph will appear. A
cursor
, which is displayed as a vertical line that extends the full
height of the graph window, is used to highlight any point in time along the x-axis.
The typical display screen shown has the Sup transducer signal listed to the left of
the y-axis and there is a
message line
below the graph that initially indicates the
starting date and time of the graphed signal. Notice that most of the locator bar has
been replaced by a
status line
in standard video that shows the signal amplitude
and the time (in microseconds) of the measurement at the current cursor location.
However, there is still an inverse video
pointer
at the far right of this line to indicate
that additional option bar choices are available.
107 686.798mi
Use the [
←
] , [
→
] and [F1]-[F4]
keys to select the desired
option. The options are listed in
Table 2-6 below.
S
U
P
ST: 594.298usec
<CURS CURS> <PAGE PAGE>
Table 2-6: Graphical Log Display Options
Option Bar Choice Description
[F1] = <CURS Move the cursor to the left and display the
amplitude and time in the status line:
(i.e. 107 686.798mi )
[F2] = CURS> Move the cursor to the right and display the
amplitude and time in the status line:
(i.e. 107 686.798mi )
[F3] = <PAGE Display the previous page
[F4] = PAGE> Display the next page
[
→
] + [F1] = START
Move the cursor to the start of the current
page and post the starting date and time in
the
message line: (i.e. ST: 451.798usec )
[
→
] + [F2] = END
Move the cursor to the end of the current
page and post the ending date and time in
the
message line: (i.e. END: 744.298usec )
[
→
] + [F3] = YMAX
Display the maximum Y value, which is set to
128 divisions in arbitrary units, in the
message line.
[
→
] + [F4] = T INC
Display the time increment value in the
message line. This is based on the
frequency of the transducers and would
equal 0.125 msec for a 1 MHz transducer.
[
←
] + [F1] = EXIT
Leave the graphical SIGNL display and
return the display to the previous data
format.
(The [EXIT] key on the keypad will also
perform this function.)