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139 SNA5000A Vector Network Analyzer User Manual
Figure 6-4 frequency setting menu
The frequency range of a channel can be expressed by three parameters: Start Frequency,
Center Frequency and Stop Frequency. If any of the parameters change, the others will be
adjusted automatically in order to ensure the coupling relationship among them:
startstopspan
stopstartcenter
fff
)/2f(ff
−=
+=
, Where
span
f
is the span.
6.3.1.1 Start Frequency
Set the start frequency of the current sweep. The start and stop frequencies are displayed at
the bottom of the grid respectively.
● The span and center frequency vary with the start frequency when the Span does not
reach the minimum. For more details, please refer to “Span”.
● In Min Span, the start frequency, stop frequency and center frequency are the same value.
6.3.1.2 Stop Frequency
Set the stop frequency of the current sweep. The start and stop frequencies are displayed at
the lower right sides of the grid respectively.
● The span and center frequency vary with the stop frequency. The change of the span will
affect other system parameters. For more details, please refer to “Span”.
● In Zero Span, the start frequency, stop frequency and center frequency are always the
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