User`s guide

Dimensions Options - Opens menu for the sizing and positioning of the box used for histograms.
Disable All command (Action menu) - Use this command to stop all running windows simultaneously.
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Shortcut Key: F8
Disconnect Network Drive - Disconnect a network drive that is currently mapped to this instrument.
Display Errors - Displays up to 64, 20-bit portions of the pattern that contained a bit error. The bit in error is marked
with a marker above the number. The bit error counter only operates at the discrete pattern match data rates. The
position of the errors in the pattern can be viewed by switching the view to "Pattern".
Display Markers Horizontal - Only horizontal marker is shown. Markers can be positioned by using the right
button of a pointing device (mouse). Click and drag near the marker to be repositioned using the right mouse
button. Release the mouse button when the marker is positioned in the desired location. Note that you do not need
to click directly on top of a marker in order to select it. The marker nearest your pick point will be selected.
Display Markers None - Neither horizontal nor vertical markers are shown.
Display Markers Vertical - Only vertical marker is shown. Markers can be positioned by using the right button
of a pointing device (mouse). Click and drag near the marker to be repositioned using the right mouse button.
Release the mouse button when the marker is positioned in the desired location. Note that you do not need to
click directly on top of a marker in order to select it. The marker nearest your pick point will be selected.
Display Options - Clicking on this button enables the dialog bar for choosing persistence time, show IN or /IN
channel--both or either, enable averaging, change zoom reference.
Display Scale - Choose the number of divisions for the histogram display.
Display Settings... - This popup dialog box allows access to display characteristics of the waveform, text and GUI.
The user can customize signal trace display colors, the window background color and font type. For options to be
activated after being changed, the Apply button must be clicked on before closing dialog box. Clicking on reset
will set all parameters to default settings.
Double Data Rate - Double Data Rate should be turned on when a DDR
clock is being used. DDR uses BOTH edges (rising and falling) of the
clock, therefore the Data with Bit-clock tool and the DataBus tool need to
measure from both the clock rising and falling to both the data rising and
falling edges.
The example to the right shows a DDR clock and data; notice that the
data is clocked by both rising and falling edges.
Duty Cycle (%) - Sets the duty cycle (%) of the OUTPUT and OUTPUT
signals.
Duty Cycle Distortion (DCD) - DCD is caused when a data signal has a static duty-cycle error and/or this error varies
with time. DCD is the difference in the mean pulse width of a "1" pulse compared to the mean pulse width of a
"0" pulse in a clock-like (repeating 0,1,0,1,...) bit sequence. DCD is part of the D distribution and is measured at
the ideal receiver threshold point.
Duty Cycle Enable - Choosing 'On' or 'Off' will enable or disable a duty cycle measurement. The results from the
duty cycle measurement will be displayed on the Summary view
Edge Count - Displays the number of positive or negative pattern edges from the selected pattern. Value can be input
manually. Edge Count mode is used when pattern lengths are not integer multiples of 20. For example, Edge
count mode generates an arm signal using a pseudo-random bit stream (PRBS). The user can input the number of
positive or negative edges in the pattern from the front panel or from the GigiView GUI screen. From the
GigiView screen, the user can also input the pattern and the software will automatically determine the number of
positive or negative edges in the pattern.
Edge to Measure - Select Rising or Falling edge to measure.
Edges to Measure - Number of edges within a range to be measured. To measure every edge in a range, the Edges to
Measure value must equal the Range (Periods) value. Ex. - Range = 1000, Edges to Measure = 100 will measure
every 10th edge. Only 100 edges will be measured in this range of 1000 periods.
Glossary