Tektronix TG700, Руководство пользователя

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HD3G7 HD 3 Gb/s SDI Video Generator
Selecting a Zone Plate
Signal
Perform the following steps to select a zone plate signal for output:
1. Press the SWEEP test signal button to enter the zone plate signal menu. Once
you enter the zone plate signal menu, the HD3G7 generator module will start
to output the displayed zone plate signal. The dot in front of the signal name,
on the second line of the display, indicates the selected default signal.
2. Use the left ( ◄ ) or right ( ► ) arrow button to select a zone plate signal from
the provided six standard zone plate signals (Circle, Diagonal, Horizontal
Sine, Horizontal Sweep, Vertical Sine, or Vertical Sweep), or from the two
user-de
fi ned signals (Custom-1 Zoneplate or Custom-2 Zoneplate).
The zone plate signal whose name is displayed will continue to be output until
a different signal is selected, even if you press the
CANCEL button.
If you select a different signal, such as a color bar signal, and then press the
SWEEP button again, the last displayed zone plate signal will be shown as
the default and will again be the output signal.
Modifying a Zone Plate
Signal
There are times when a speci fi c test case requires a modi fi ed zone plate signal.
By making and saving changes to the zone plate parameters you can create a new
signal that is based on the selected signal, and then save that new signal. Changes
you make affect only the new signal; the standard zone plate signal used as a
basis for the new signal is not changed.
Before making changes, make sure you are familiar with both the zone plate
pattern control parameters (below) and zone plate pattern dependent parameters.
(See page 3-154,
Zone Plate Dependent Parameters .)
Perform the following steps to change a zone plate signal’s parameters:
1. Press the SWEEP button to enter the zone plate signal menu.
2. Use the left ( ◄ ) or right ( ► ) arrow button to select a zone plate signal
from the provided six standard zone plate signals (Circle, Diagonal, H Sine,
H Sweep, V Sine, and V Sweep), or two user-de
fi ned signals (Custom–1
Zoneplate or Custom–2 Zoneplate).
3. When the desired zone plate signal is displayed, press the ENTER button to
enter the zone plate parameter menu. If Circle Zoneplate was displayed,
for example, the display changes to:
which shows the zone plate signal (CIRCLE SWEEP) and the pattern control
parameter (Circle Frequency). As mentioned earlier, each of the standard zone
plate signals have a pattern control parameter that is unique to that signal:
TG700 TV Signal Generator Platform User Manual 3–151