8 Frequency Scan Measurement
Meas Setup
Limits
Opens the Limit Lines menu that contains keys to control limit lines of the current measurement. Only the
upper limit is used in the Frequency Scan measurement.
Key Path
Meas Setup
State Saved Saved in instrument state.
Initial S/W Revision A.07.00
Select Limit
Specifies the selected limit. The term “selected limit” is used throughout this document to specify which
limit will be affected by the functions.
Key Path
Meas Setup, Limits
Notes Front panel only. The selected limit is remembered even when not in the Limit Menu.
Preset Limit 1
State Saved Saved in instrument state.
Initial S/W Revision A.07.00
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 484) will be tested against the limit. If Limit On/Off is On, the following
occurs:
• The limit line is displayed, in the same color, but paler, as the limited trace. Portions of traces that fail
the limits will be displayed in red.
• The margin line is displayed if Margin is on and the Margin Value is non-zero (see "Margin" on page 489).
The margin line is displayed in the same color as the limit line, but paler still and dashed. Portions of
traces that pass the limits but fail the margin will be 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 (All Limits)"
on page 496). 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 that fail the limits and/or margins only applies to traces
whose X-axis corresponds to the current analyzer X-axis. Traces that are not updating (in View, for
example) will not change color if the analyzer X-axis settings (e.g., 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 corner.
EMI Receiver Mode Reference 483
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