User`s guide

Offset (mV) - Sets the voltage offset of the waveform, or use the
"Vertical Position" knob on the front panel.
Offset (ps) - Offsets the specification area (in picoseconds).
Offset Frequency (Hz) - Frequency at which dBc is calculated.
Offset Width (Hz) - Range of frequencies, centered on the
offset frequency, over which the dBc is calculated.
Offset\Width Limits - Choose between typical setup and hold
limits and worst case setup and hold limits. "Typical"
references the Mean of the clock histogram. "Worst case"
references extrapolated Min and Max values of the
measured clock histogram using Tail-fit.
Online Documentation - This selection provides access to
WAVECREST Manuals, Application Notes and Technical
Bulletins. When selected, an active index for all
WAVECREST Corporation documentation is displayed in
Adobe Acrobat Reader (version 3.0 or later). Click on the Document Summary number for a brief overview of
the document or click on the Document Number to bring up the document in Adobe Acrobat. Acrobat is available
during the installation of GigiView or from Adobe.com.
Open command (Tool menu) - Use this command to open an existing/saved tool in a new window.
You can open multiple tools at once. Use the Tool pull down menu to switch among the multiple
open tools. See also 1, 2, 3, 4... command. Shortcut Keys: CTRL+O Toolbar.
Open PM Utility - Available only if pattern marker is selected as trigger. Clicking on this button will activate the
PM50 Tool in GigiView.
Optical Channel Assignment - Clicking on the Optical Channel Assignment tab will initiate the GPIB polling process to
see that each OE-2 is correctly addressed. Each OE-2 correctly addressed will be shown in the Optical Input window,
along with its GPIB device address. If an OE-2 connected to the bus does not appear in the window, its address may
be incorrectly set. Return to the GPIB Address Assignment window to correct the address settings.
It is necessary to assign which channel of each OE-2 is connected to which channel of the instrument. This is done by
highlighting one line in the Optical Input window (corresponding to one channel path) and selecting the DTS or SIA
input channel in the SIA Channel window. To activate this channel, click the "Active" box.
Optical Input - This area lists each OE-2 connected to the instrument.
Optical Configuration Command (Edit Menu) - Permits Optical instrument settings to be modified. The user can
customize GPIB board and device addresses as well as optical parameters. Please refer to your OE-2 User’s Guide
for more information.
Optimize Button - If Calc Initial Conditions is set to On, this will estimate initial conditions based on prominent
features of the data and perform least squares fitting of data to 2
nd
-order PLL transfer function.
If Calc Initial Conditions is set to Off, this will perform least squares fitting of data to 2
nd
-order PLL transfer
function using user-entered initial conditions.
Output Amplitude (V) - Enter output amplitude for Custom output configurations. See Output Levels for limits.
Output Level - This list control displays 10* predetermined and 3 user definable presets for the configuration of the
impedance, high, low and voltage limit settings for the selected Output or Sync levels. First, the user should make
a selection from the Output Level control. Choices appear for many types of standard logic, including ECL,
PECL, TTL, CMOS (3.3V), and CMOS (5V). Selecting any of these will automatically determine the input's
voltage threshold and termination impedance, and these values will be filled in and cannot be selected for the user
to change. There are also choices for three custom voltage levels available to the user. If any of the custom
voltage levels are chosen, the termination impedance and voltage threshold controls become active and their
values need to be specified. See the DTS-550™ Operator’s Guide for Sync Level parameters.
Output Offset (V) - Sets the main output offset level in the three custom output level presets. Refer to custom Output
Level for maximum and minimum offset values.
Glossary © WAVECREST Corporation 2005
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