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1052
Meas Setup
Select Limit
Specifies the selected limit. The term “selected limit” is used throughout this document to specify which
limit is affected by the functions.
Limit On/Off
Selects whether the limit and margin are displayed. If Test Limits is on, this also determines whether the
test trace (see “Test Trace” on page 1053) is tested against the limit. If
Limit On/Off is On, the following
occurs:
• The limit line is displayed, in the same color as the limited trace, but paler. Portions of traces which
fail the limits are displayed in red.
• The margin line is displayed if Margin is on and the Margin Value is non-zero (see “Margin” on
page 1059). The margin line is displayed in the same color as the limit line, but paler still and dashed.
Portions of traces which pass the limits but fail the margin is displayed in amber.
• The trace is tested for the purpose of the “Trace Pass/Fail” indication in the graticule if, in addition to
Limit On/Off being On, the trace is displayed and Test Limits (All Limits) is on (see “Test Limits” on
page 1064). If the trace is not tested, no report of the trace passing or failing is seen on the graticule.
Note that the SCPI queries of Limit Pass/Fail are independent of these conditions; the test is always
performed when queried over SCPI.
The PASS/FAIL box in the corner of the Meas Bar is only displayed if there is at least one “Trace
Pass/Fail” indication displayed in the graticule.
Note that the red and amber coloring of traces which fail the limits and/or margins only applies to traces
whose X-axis corresponds to the current test set X-axis. Traces which are not updating (in View, for
example) will not change color if the test set X-axis settings (for example, start and stop frequency) do
not match those of the trace, for example if they have been changed since the trace stopped updating. In
this case, the Invalid Data indicator (*) will appear in the upper right hand corner.
When the limits are frequency limits but the trace is a zero-span trace, the limit trace is drawn at the limit
amplitude of the center frequency. When the limits are time limits but the trace is a frequency domain
trace, the limit trace is drawn according to the current time axis, with the left of the screen being 0 and
the right being equal to sweep time.
Preset Limits are turned off by a Preset, but the Limits arrays (data) are only reset
(deleted) by Restore Mode Defaults. They survive shutdown and restarting of
the test set application, which means they will survive a power cycle.
Key Path
Meas Setup, Limits
Notes The selected limit is remembered even when not in the Limit Menu.
Preset Limit 1, not affected by Mode Preset, preset by Restore Mode Defaults.
State Saved Saved in State.
Initial S/W Revision A.02.00
Key Path
Meas Setup, Limits