IM 701450-02E
14
Introduction to Main Functions
Search and Zoom
User’s manual section 10.4, “Searching Waveforms Using the Search and Zoom Function”
You can search saved waveforms and zoom-display those that match the search criteria. The following five search
methods are available.
Edge
Performs a search based on the
number of times that a waveform falls
below or above (rising/falling) a
specified level.
Serial pattern
Performs a search based on whether
the serial status pattern of the
waveform (the status pattern of the
waveform that changes over time) is
High(H)/Low(L)/Don’t care(X) and
whether it is the same as a specified
pattern.
Parallel pattern
Performs a search based on whether
the parallel status pattern of the
waveform (the status pattern of the
waveforms at the same point in time)
is High(H)/Low(L)/Don’t care(X) and
whether it is the same as a specified
pattern. You can also search by each
bit of a logic signal.
Pulse width
Searches for waveform pulses lying
above or below a specified level
whose widths are of shorter or longer
duration than a specified time.
The zoom position automatically
moves in the specified direction. You
can watch the zoomed waveform as it
scrolls, then stop it at any desired
position.
Auto scroll
Analyzing or Searching SPI Signals
User’s manual section 10.11, “Analyzing and Searching SPI Signals”
SPI (serial peripheral interface) is an interface developed by Motorola. In this system, data is transferred using three
signal wires: clock signal, output data, and input data. By adding a chip select signal (CS), a master device can
control output data from a slave device. Data is synchronized to the clock signal and transmitted in units of bytes (8-
bits). The DL7400 analyzes and searches these SPI signals in single-byte units.
I/O1
I/O2
SCK
SDO
SDI
CS1
CS2
Clock
Output data*
Input data*
SS
SCK
SI
SO
Master
Slave 2
SS
SCK
SI
SO
Slave 1
* Input/output from the viewpoint of the master.
Cursor Measurements
User’s manual section 10.5, “Making Cursor Measurements”
You can place cursors on a waveform to display the measured values at the points where the cursor intersects with
the waveform. There are four types of cursor available: horizontal, vertical, marker, and angle cursor.
Marker 3
Marker cursor
Vertical cursor
Cursor2
Cursor1
Measured values at the cursor
Measured values at the cursor
Marker 2
Marker 1
Marker 4
