To Next Page

To Previous Page

3 Spectrum Analyzer Mode

3.2 Swept SA Measurement

3.2.8.2 Limits

Contains controls for the Limit Lines of the current measurement. Limits arrays can

be user-entered, sent via SCPI, or loaded from a file.

Dependencies Only appears if you have the proper option installed in your instrument

Preset Limits are turned off by Preset, but the Limits arrays (data) are only reset (deleted) by Restore Mode

Defaults. They survive shutdown and restarting of the instrument application, which means they will

survive a power cycle

Select Limit

Specifies the selected limit. The term “selected limit” is used throughout this

document to specify which limit is affected by the functions.

Notes The selected limit is remembered even when not in the Limits menu

Preset Limit 1, not affected by Mode Preset, preset by Restore Mode Defaults

State Saved Saved in instrument state

Limit On/Off

Selects whether the limit and margin are displayed. If "Test Limits" on page 401 is

ON, this also determines whether the "Test Trace" on page 395 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 that fail the limits are displayed in red

–

The margin line is displayed if "Margin" on page 389 is ON and the Margin Value

is non-zero. 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

are 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" on page 401 is ON. If the trace is not tested, no report of the trace passing

or failing is seen on the graticule. Note that the SCPI queries for Limit Pass/Fail

are independent of these conditions; the test is always performed when queried

via 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 apply to traces whose X-axis corresponds to the current instrument X-axis.

388 Spectrum Analyzer Mode User's &Programmer's Reference

Keysight x-series User Manual

Other manuals for Keysight x-series