Tektronix DPO2304SX, Печатная инструкция, Страница: 98 / 920

Using logic waveforms. This online help supports many oscilloscope models from Tektronix. This feature is only available on
some models.
The instrument can display logic waveforms of analog or digital signals in bus views with bus decoding. You can use digital,
analog, and math waveforms to define up to 16 buses (serial or parallel) in the Bus Setup window.
You can use a logic probe to connect the D15-D0 channels to signals in your system under test. If you need more than 16 digital
channels in a bus, you can designate Ch1-Ch4 and Math1-Math4 to be logic waveforms in the Bus Setup window.
The instrument acquires and displays data from digital signals as follows:
■ Stores a high or low state of the logic waveform for each sample. You can set the voltage threshold level on individual
channels.
■ Depicts data as a waveform, a busform, or both.
■ Decodes data as numeric or symbolic values.
■ Displays a logic high level as green and a logic low level as blue.
■ Color codes the channel labels and on-screen indicators for the D15-D8 and the D7-D0 channels that follow the color code
used on the logic probes.
■ Adds custom labels for easier channel-to-signal identification.
■ Uses iCapture to display the analog view of up to four signals connected to the logic probe. If you want to see the analog
characteristics of signals connected to the logic probe, you can assign up to four of the D15-D0 channels to the Ch1-Ch4
function with iCapture.
NOTE. iCapture is available on MSO70000C/DX Series instruments.
What do you want to do next?
Learn about iCapture.
Learn about bus setups.
Learn about digital setups.
Using waveform math. Waveform math in the instrument can be as simple as basic arithmetic or as powerful as building a
complicated math expression.
Equation editor. You can build a complicated math waveform expression using multiple waveform sources, constants, variables,
operators, and functions. The waveform sources can be any channel, reference, or math waveform.
You can enter constants with a keypad. Live results from the measurement system can be used as variables, and there is a full
assortment of arithmetic operators and math functions to use. As you enter the waveform expression, you will see it appear as an
equation in the control window.
You can define up to four separate math waveforms.
Using spectral analysis. When you are displaying an FFT (spectral) math waveform, you can use either of these two ways to
operate the instrument:
■ Use the conventional time-domain instrument controls, such as vertical and horizontal position and scale.
■ Use the spectrum analyzer controls, such as center frequency, span, resolution bandwidth, and reference level.
When you use the Basic Spectrum Analyzer controls, the instrument automatically sets its time domain parameters, including
record length and sample rate, as necessary to give you the view of the spectral waveform that you want to see. You can switch
back to using the conventional time-domain controls at any time.
Spectral waveforms can be simple magnitude or phase waveforms calculated from the data acquired on a single channel. Or you
can combine spectral operations with other math operations to do complex analysis of your signals.
About Tektronix oscilloscopes
66 DPO70000SX, MSO/DPO70000DX, MSO/DPO70000C, DPO7000C, and MSO/DPO5000B Series