6-54 Chapter6
Front-Panel Key Reference
MEASURE
MEASURE
In the Spectrum Analyzer (SA) mode, accesses a menu of keys that
allow you to make adjacent channel power, channel power, occupied
bandwidth, emission bandwidth, and harmonic distortion
measurements.
NOTE When a measurement is activated, Signal Track, Video Averaging,
Segmented Sweep, Band Power and Marker Noise will be turned off.
NOTE When Signal Track, Video Averaging, Band Power, Marker Noise or
Span Zoom are activated, a running measurement will be turned off.
Meas Off Turns the active measurement function off.
ACP Sets the span slightly wider than three channels, each designated by a
pair of vertical lines and double-headed arrows. Splits the screen, and
in the lower window displays the absolute power in the center channel
in dBm and the power in each of the adjacent channels in dB relative to
the center-channel power. Also displayed are center-channel
bandwidth, adjacent-channel bandwidth, and channel spacing.
The resolution bandwidth is set to nominally 1 to 3 percent of the center
channel bandwidth, and the video bandwidth is set ten times wider
than the resolution bandwidth to minimize its averaging effect.
Pressing
Meas Setup after selecting ACP allows you to set the bandwidth
of the center channel and the two adjacent channels. The two adjacent
channels always have the same bandwidth. You may also set the
channel spacing; overlapping the channels is not allowed.
Channel Power Measures the power and power spectral density in the channel
bandwidth specified by the user. One marker pair on the display
indicates the edges of the channel bandwidth. The measurement may
be configured by pressing
Meas Setup after Channel Power has been
selected. The measurement can be made in single or continuous sweep
mode. The center frequency, reference level, and channel bandwidth
must be set by the user.
Pressing
Meas Setup after Channel Power has been selected will access
the channel power measurement setup menu. Pressing
Meas Control
after Channel Power has been selected will access the channel power
measurement control menu which allows you to pause or restart your
measurement, or toggle between continuous and single measurement.
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