User Manual

4.2. Full Span
Set the span of analyzer to be maximum.
4.3. Zero Span
Set the span of analyzer to be 0Hz. In this case, stop frequency and start frequency are both equal to
center frequency, the horizontal axis denotes time. The analyzer here is measuring the time domain
characteristics of amplitude where frequency point is.
Key points:
 In zero span mode, the analyzer displays the time domain characteristic of fixed frequency
component, which has many difference with non-zero mode, and the following functions are valid
in zero span mode:
 FREQ : Signal Track
 Marker-> : “Mkr->CF”, “Mkr->Step”, “Mkr ->Start”, “Mkr ->Stop”, “Mkr△->CF” and “Mkr△-
>Span”.
 Marker : Readout of “Frequency”, “Period” and “1/△time” (valid in Delta marker type).
 TG : Power Sweep
4.4. Last Span
Set the span of analyzer to be previous setting.
4.5. AMPT
Enable the reference level and enter into the amplitude menu. Through these parameters, tested
signal can be displayed at an optimal view with least error.
4.6. Auto Scale
To set the highest resolution for Y axis of current screen on condition that the signal is full displayed.
A reference level is set automatically and ensures the peak of signal always on the topmost of grid for
best view of tracing line.
Figure 2-2 Before Auto Scale
Figure 2-3 After Auto Scale
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