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:
•Video bandwidth is at least 10 times the resolution bandwidth.
•Detector mode is sample (SMP). (You can use DETECTOR SMP PK to select the detector mode.)
•Resolution bandwidth is less than or equal to 100 kHz.
•Video averaging is OFF.
•Neither MAX HOLD nor MIN HOLD trace mode is selected.