User`s manual

135
Description of controls/indicators is as follows:
Averager Block: Controls averaging of successive FFT spectral traces.
Number of Averages selects the number of averages to be applied to spectral
traces in the Exponential and Peak Hold averaging modes (explained below).
The more averages applied, the smoother the displayed spectrum waveforms
will be; however, the waveforms will also update more slowly as Number of
Averages is increased. For voice filtering applications 8 to 32 averages are
recommended. The user can freeze an averaged trace by clicking Run button
until the LED is not illuminated; resume the analyzer screen update by clicking
Run button until the LED is illuminated GREEN. The user may clear the
averaged trace(s) and restart the average at any time by clicking on the Clear
button. The Mode selection allows the user to switch the averaging mode
between No Average (non-averaged spectrum displayed for fastest response),
Exponential averaging (normally recommended – spectrum builds both up and
down using specified Number of Averages), or Peak Hold averaging
Figure 4-77 Spectrum Analyzer Window