Tektronix AWVG1, User Manual

Page: 38 / 116

Operating Procedures
2- 14
AWVG1 Wideband Video Generator User Manual
3. Touch the Zone Plate icon. The Zone Plate Parameters window appears, as
shown below.
Because you selected a standard zone plate signal, a Pattern Control
Parameter appears at the top of the list of parameters (Circle Frequency in
this case). This parameter controls the basic pattern frequency by adjusting a
set of dependent parameters, which are indented on the display. In this
example, the Circle Frequency parameter has been selected by pressing the
front-panel Select key.
4.
Change parameters and save a new signal as follows:
a. To see how the module informs you of a change to the Pattern Control
Parameter, press the Navigation arrow to move the cursor down to
KX
(H freq) . Rotate the Navigation knob. A popup menu will warn you that
the Pattern Control Parameter will become invalid. This means that the
signal will change shape. Touch
OK to continue.
b. With the KX parameter still selected, press the 9 key on the keypad,
followed by the
Enter
key to change the parameter value to 9 c/aph.
c. If you touch T Reset , it will enable or disable the temporal movement of
the zone plate signal you create.
d.
Touch
Quit/Save
. A dialog box will be displayed; touch
Save As
to
name the new signal you have created. You will be using the same screen
that was used on page 2--12. This will not modify the original Bullseye
signal, but will create a new signal based on the Bullseye signal.
e.
After you name the new signal, you can see the new name displayed in
the status bar. Note that there is no Pattern Control Parameter, and that
there are no dependant (indented) parameters.