Tektronix 2715, Руководство пользователя

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Dedicated Controls
2715 User Manual
4–33
PEAK FIND. You can use PEAK FIND to automatically position a marker on the
highest signal on screen.
42. Ensure that the markers are turned off.
43. Set the center frequency to 275 MHz.
44. Press [PEAK FIND].
The marker is automatically turned on and jumped to the peak of the
calibration signal at 100 MHz. The 2715 detected the highest signal on
screen and automatically moved the marker to it. After the move, the 2715
behaves exactly as if you had moved the marker there manually.
45. Press [MKR] [
'
] to move the marker to the peak of the third harmonic.
46. Press [PEAK FIND] again.
The marker moves back to the fundamental; the marker peak find feature
always locates the highest peak on screen.
We have discussed and experimented with all the 2715 functions except the
menu keys and a few miscellaneous controls. The menu keys are covered
thoroughly in Operating Basics section, and the remaining, miscellaneous
controls will be covered briefly here.
NOTE . Any control settings can be used.
PLOT.
Immediately below the VERT SCALE function block is a PLOT button
that causes an optional printer or plotter to draw an image of the screen. The
on-screen readouts are plotted on the drawing in the border area so they do not
interfere with the waveform. If you wish to have graticule lines on the printout,
you must turn them on by pressing [UTIL] [4] [1] [5]. You can also add labels to
the plot (see Adding Titles and Labels on page 6–36).
Before attempting to create a screen plot, ensure that the communications port is
correctly configured (see System Configuration on page 6–67).
To make a plot of the screen, check that your printer or plotter is powered up, on
line, and that the paper is in correct registry. Then, with the 2715 displaying the
desired trace(s), press [PLOT].
The printer or plotter quickly begins to draw the trace. Because the printer or
plotter output data is sent to a temporary buffer, the 2715 returns to the spectral
display and is ready to accept additional commands before printing or plotting
ends. A typical plot in shown in Figure 4–2.
Miscellaneous Controls