R&S ZVB - Page 249

R&S
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ZVA / R&S
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ZVB / R&S
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ZVT GUI Reference
Trace Menu
Operating Manual 1145.1084.12 – 30 234
a maximum of flexibility:
 Ranges do not have to be sorted in ascending or descending order (e.g. the Start Stimulus value
of range no. n doesn't have to be smaller than the Start Stimulus value of range no. n+1).
 Overlapping ranges are allowed. The limit check in the overlapping area is related to the tighter
limit (the pass test involves a logical AND operation).
 Gaps between ranges are allowed and equivalent to switching off an intermediate ripple limit
range.
 Ripple limit ranges can be partially or entirely outside the sweep range, however, the limits are
only checked at the measurement points.
The following figure shows a ripple limit test involving 3 ranges.
As a consequence of the limit line rules, the limit check will always pass a DUT if no limit lines are defined.
File Format for Ripple Limits
The analyzer uses a simple ASCII format to export ripple limit data. By default, the ripple limit file has the
extension *.ripple and is stored in the directory shown in the Save Ripple Limit and Recall Ripple Limit
dialogs. The file starts with a preamble containing the channel and trace name and the header of the
range list. The following lines contain the entries of all editable columns of the list.
Example of a ripple limit file
The ripple limit list:
is described by the ripple limit file:
Remote control:
MMEMory:LOAD:RIPPle "Trc_name","file_name"
MMEMory:STORe:RIPPle "Trc_name","file_name"