Rigol DSA1030, Руководство пользователя

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RIGOL Front Panel Key Reference
2-86 User’s Guide for DSA1000 Series
Key Points:

When the measurement starts, the analyzer will search the two points which are
located at both sides of the current point and are N dB amplitudes smaller or
greater than the current point, and display the frequency difference between the
two points, or else display "---", indicating the search failed.

You can use the numeric keys, knob or direction keys to modify the value of N, for
more details please refer to “Parameter Input”.
Table 2-57 N dB BW parameter settings
Parameter Explanation
Default -3 dB
Range
-100 dB to 100 dB
Unit
dB
Knob Step 0.1 dB
Direction Key Step 1 dB
2.5.3.4 Function Off
Turns off the opened noise markers or N dB BW measurements, but not the markers
themselves.
2.5.3.5 Freq Count
Figure 2-27 Frequency Count measurement
Counter Readings