User`s guide

Sync Mode - Used to specify the mode of operation of the SYNC OUT signal.
Jitter Sync This mode will cause the SYNC OUT to follow the Jitter Frequency value. The Jitter Frequency
value must be greater than 510.8Hz. The Jitter Output On/Off control does not need to be enabled.
The Sync Freq and Sync Divide controls will be disabled with this selection.
Bit Clock This mode will cause the SYNC OUT to follow the main Frequency value. The Sync Divide
control is enabled. The Sync Freq control is disabled and will follow the Frequency value.
Independent The Independent mode will cause the SYNC OUT to operate as an independent signal source. If
jitter is programmed, OUTPUT will move relative to SYNC OUT. This selection can also be used
to generate a clock-type waveform on the SYNC OUT connector that has a different frequency from
the OUTPUT signal. Both the Sync Divide and Sync Freq controls are enabled.
Sync Offset (V) - Sets the sync offset in the three custom sync level presets. Refer to Sync Level for maximum and
minimum offset values.
Sync Termination - Sets the sync termination when one of the three custom sync level presets is selected. Refer to
Sync Level for valid termination settings.
Synthesizer - Enables/disables run state of the DTS-550. When set to On, the instrument's internal DTS synthesizer will
generate the specified waveforms. No output will be generated when Off is selected.
In order to receive any type of output signals from the unit, the All Outputs control needs to be set to Run and the
Synthesizer control needs to be set to On.
TailFit - Pull-down menu list for enabling/disabling tail-fit feature. When Tail-fit is enabled, Random Jitter and Deterministic
Jitter can be separated in order to calculate Total Jitter. To accurately predict long-term clock performance, Tail-fit is
necessary when the histogram is not Gaussian. See Tail-fit theory, Appendix B, for more information. See also Force-fit.
TailFits - Determines the number of pattern spans to be measured in order to calculate random jitter. The default mode will
automatically determine the number of tail-fits that are necessary to insure no frequency bias exists. When using this
mode, three tail-fits are initially performed and an RMS jitter is calculated. Additional tail-fits are then performed
between the initial tail-fits. If the resulting RMS jitter is not within the accuracy percentage specified, this same
process is repeated. The percentage can be specified using the Accuracy option. Optionally the number of tail-fits to
perform can be explicitly set. For a more detailed explanation of Tail-fit, see Appendix B.
Tdelay (ns) - Position the histogram box horizontally.
© WAVECREST Corporation 2005 Glossary
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