User`s guide

5Key Reference
102 N9340B User’s Guide
Channel Power
Channel power function measures the power and
power spectral density in the channel bandwidth
specified. One pair of vertical lines of the displayed
green frame indicates the edges of the channel
bandwidth. The center frequency, reference level,
and channel bandwidth must be set by the user.
The power calculation method used to determine
the channel power is a traditional method known
as the integration bandwidth (IBW) method. A
swept spectrum is used as the basis for this
calculation. Therefore, it is important to set the
resolution bandwidth correctly before making this
measurement using the following formula:
Where k is a value between 1.2 and 4.0 and n is
the number of trace points.
Center Frequency
Key access: [MEAS] > {Channel Power} > {Center Freq}
Sets the center frequency of the display.
Integration Bandwidth
Key access: [MEAS] > {Channel Power} > {Int BW}
Specifies the bandwidth of integration bandwidth,
which can range from 100 Hz to 3 GHz to calculate
the power in a channel. For example, set the main
(center) channel bandwidth. The green frame
indicates the integration bandwidth.
Channel Bandwidth
Key access: [MEAS] > {Channel Power} > {Channel BW}
Sets the analyzer span for the channel power
measurement using the knob, the arrow keys or the
numeric keypad. Be sure the span is set between 1
and 10 times the integration bandwidth.
RBW k
Span
n
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