Tektronix 744A User Manual

Specifications

TDS 684A, TDS 744A, & TDS 784A Service Manual

H Select the mode for interpolation (linear or sin (x)/x). This can increase the

apparent sample rate on the waveform when the maximum real-time rate is
exceeded.

H Use sample, envelope, and average modes to acquire signals.

With the TDS 7XXA, also use high-resolution and peak-detect modes.

H Set the acquisition to stop after a single acquisition (or sequence of

acquisitions if acquiring in average or envelope modes) or after a limit
condition has been met.

H Select channel sources for compliance with limit tests. You can direct the

TDS to signal you or generate hard copy output either to a printer or to a
floppy-disk file based on the results. Also, you can create templates for use
in limit tests.

Help and autoset can assist you in setting up the Digitizing Oscilloscope to make
your measurements.

Help displays operational information about any front-panel control. When help
mode is in effect, manipulating any front-panel control causes the Digitizing
Oscilloscope to display information about that control. When help is first
invoked, an introduction to help is displayed on screen.

Autoset automatically sets up the Digitizing Oscilloscope for a viewable display
based on the input signal.

Once you have set up to make your measurements, the cursor and measure
features can help you quickly make those measurements.

Three types of cursors are provided for making parametric measurements on the
displayed waveforms. Horizontal bar cursors (H Bar) measure vertical parame-
ters (typically volts). Vertical bar cursors (V Bar) measure horizontal parameters
(typically time or frequency). Paired cursors measure both amplitude and time
simultaneously. These are delta measurements; that is, measurements based on
the difference between two cursors.

Both H Bar and V Bar cursors can also be used to make absolute measurements.
For the H Bars, either cursor can be selected to read out its voltage with respect
to any channel’s ground reference level. For the V Bars, the cursors measure time