ADVANTEST R3131 Series User Manual

R3131 Spectrum Analyzer Operation Manual
2.2.12 Intermodulation
Setting the measurement conditions
This changes the analyzer settings so that the input signal is displayed more clearly.
6. Press FREQ, 2, 0, 0 and MHz.
A center frequency of 200 MHz is set.
7. Press SPAN, 1 and kHz.
A frequency span of 1 kHz is set.
8. Press BW, RBW AUTO/MNL, 1, 0 and kHz.
The RBW is set to 10 kHz. The attenuator level default setting is 10 dB, which
makes the input to the mixer -20 dBm (= -10 dBm - 10 dBm). Since the mixer
level exceeds the distortion limit, spurious peaks (3 and 4) appear in addition to
the normal peaks (1 and 2).
ADVANTEST R3131
REF 0.0 dBm
10010/.. _
Thu 11 Dec 1997Span
ATT 10dB A_wrt B_blnk
NormNorm Full Span
SPAN 2
L000 MHz .Zero Span
CENTER 200.000 MHz
*RBW 3 kHz VBW 1 kHz
SPAN 1.000 MHz Last Span
SWP 670 ms
Figure 2-47 Screen Display Showing Intermodulation Distortion
Changing the attenuator
9. Press LEVEL, ATT AUTOIMNL, 3, 0 and GHz (dB).
The attenuator level is set to 30 dB.
Under these conditions, the mixer input level is -40 dBm, and spurious peaks
(peaks 3 and 4 in Figure 2-47) are not produced.
2-53

ADVANTEST R3131 Series Specifications

General

Brand	ADVANTEST
Model	R3131 Series
Category	Measuring Instruments
Language	English