The TDS 500D
and TDS 700D
portable, four-channel instruments suitable for use in a
variety of test and measurement applications and systems.
Use a combination of front-panel buttons, knobs, and
on-screen menus to control
the many functions of the Oscilloscope
. The front-panel
controls are grouped
according to function: vertical, horizontal, trigger, and
special. Set a function you
adjust often, such as vertical positioning or the time base
setting, directly by its
own front-panel knob. Set a function you change less often,
such as vertical
coupling or horizontal mode, indirectly using a selected menu.
Pressing one (sometimes two) front-panel button(s), such as
displays a main menu of related functions, such as coupling
and bandwidth, at
the bottom of the screen. Pressing a main-menu button, such
displays a side menu of settings for that function, such as
AC, DC, or GND
(ground) coupling, at the right side of the screen. Pressing
a side-menu button
selects a setting such as DC.
On-screen readouts help you keep track of the settings for
such as vertical and horizontal scale and trigger level.
Some readouts use the
cursors or the automatic parameter extraction feature
(called measure) to display
the results of measurements made or the status of the
General Purpose Knob
Assign the general purpose knob to adjust a selected
parameter function. More
quickly change parameters by toggling the SHIFT button. Use
the same method
as for selecting a function, except the final side-menu
selection assigns the
general purpose knob to adjust some function, such as the
position of measure-
ment cursors on screen, or the setting for a channel fine gain.
The user Interface
also makes use of a GUI, or Graphical
, to make
setting functions and interpreting the display more
intuitive. Some menus and
status are displayed using iconic representations of
function settings, such as
those shown here for full, 250 MHz and 20 MHz bandwidth.
Such icons allow
you to more readily determine status or the available settings.
Signal Acquisition System
The signal acquisition system provides up to four,
full-featured vertical channels
with calibrated vertical scale factors from 1 mV to 10 V per
on TDS model. All channels can be acquired simultaneously.
Each of the full-featured channels can be displayed,
vertically positioned, and
offset, and their vertical coupling specified. Some models
can have their
bandwidth limited (250 MHz or 20 MHz). Fine gain can also be
Besides these channels, up to three math waveforms and four
forms are available for display. (A math waveform results
when you specify dual
waveform operations, such as add, on any two channels. A
results when you save a waveform in a reference memory).
There are three horizontal display modes: main only, main
delayed only. You can select among various horizontal record
A feature called “Fit to Screen” allows you to view entire
within the 10 division screen area. Waveforms are compressed
to fit on the
screen. See Table 1–2.
Both the delayed only display and the intensified zone on
the main intensified
display may be delayed by time with respect to the main
trigger. Both can be set
to display immediately after the delay (delayed runs after
main mode). The
delayed display can also be set to display at the first
valid trigger after the delay
The delayed display (or the intensified zone) may also be
delayed by a selected
number of events. In this case, the events source is the
The delayed trigger can also be set to occur after a number
of events plus an
amount of time.