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Spectrum Analyzer Mode Key Descriptions
Spectrum Analyzer Mode Functions
The total power of the channel is displayed. The adjacent
channel power ratios of both channels are also displayed and
the larger number is marked with a A. (Vertical lines on
the display indicate the six edges of the upper, lower, and
reference channels being measured.)
The measurement stops and the analyzer is returned to its
prior state when other measurement functions are activated.
The center frequency must be set to the intended carrier
frequency and the reference level set to optimize the
displayed signal. The channel bandwidth and channel
spacing must be entered by the user. If
PARAM
AUTO is
selected (so AUTO is underlined), other analyzer settings
will then be coupled and set automatically. The adjacent
channel power measurement is an rms measurement. This
means that the measurement of the total channel power and
the adjacent channel power ratios are accurately reported,
whether the transmitted signal contains tones, noise, or
both. IF
PARAM
AUTO is selected the parameters of the
instrument state are set for a valid measurement.
When using
PARAM
MAN, the following conditions must be
maintained to make a valid rms measurement:
l Video bandwidth is at least 10 times the resolution
bandwidth.
l Detector mode is sample (SMP). (You can use
DETECTOR SMP PK to select the detector mode.)
l Resolution bandwidth is less than or equal to 100
kHz.
l Video averaging is OFF.
l Neither MAX HOLD nor MIN HOLD trace mode is selected.
Front-Panel Key Access
[MEAS/USER]
6-11