Key Reference 5
N9342C/43C/44C User’s Guide 115
Channel Space
Key access: [MEAS] > {ACPR} > {Channel Space}
Sets the space value between the center frequency
of main channel power and that of the adjacent
channel power.
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.
RBW k
Span
n
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