Ceyear 4041 Series, User Manual

Page: 44 / 203

Chapter IV Spectrum Analyzer Mode
32
Press
【
Span
】
and 5 [MHz].
As shown in Fig 4-6, the two signals are at the center of the screen. If the applied frequency interval is different
from that in this example, a span three times greater than the frequency interval of signal generator should be
used.
c) Decrease the resolution bandwidth until the distortion product can be seen:
Press
【
BW
】
and then
【
↓
】
step key to decrease the resolution bandwidth.
d) Adjust the two signal generators to verify that the amplitudes of input signal are identical:
Press
【
Marker
】
, [Detla],
【
Peak
】
and [Next Pk]. Adjust the signal generator corresponding to the marker until
the difference of the two amplitudes is 0. Decrease the video bandwidth if required.
Fig 4-6 Signal at the center of spectrum analyzer display
e) Set the reference level and place the signal peak at the reference level:
Press
【
Peak
】
and [Peak Search] successively, and then read the peak power.
Press
【
Ampt
】
and [Ref Level].
In order to obtain the optimal measurement accuracy, the signal peak of signal generator should be placed at the
reference level, as shown in Fig 4-7.