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30kHz, and turn on the noise marker.
5) Set the resolution bandwidth and video bandwidth to auto; enable the averaging function; and
perform 16 times of averaging.
6) Record the difference marker amplitude value as the sideband noise at +30kHz deviation point
in the corresponding measuring item of the S5105D/E/F Microwave Analyzer Record Form.
7) Press
【
Mkr
】
- 30 [ kHz] on the microwave analyzer and record the delta marker amplitude
value as the sideband noise at the -30kHz deviation point.
8) Set the microwave analyzer according to Table 5-3 and complete the sideband noise at
±100kHz and ±1MHz deviation, and record it in the corresponding test item of
S5105D/E/F Microwave Analyzer Record Form
If there is a spurious response at the
frequency deviation point under test, keep away from the spurious response when reading the
marker value in the test.
Table 5-3 Sideband Noise Measurement Settings
Offset frequency Δf
Span
RBW
VBW
Avgs
±30kHz
100kHz
Auto
Auto
On
±100kHz
300kHz
Auto
Auto
On
±1MHz
2.2MHz
Auto
Auto
On
6
Explicit Average Noise Level
Description: The explicit average noise level refers to the background noise observed by the spectrum
analyzer when there is no additional noise or signal.
The input port of the spectrum analyzer is connected to a 50
matcher. The normalized noise value
observed when the input attenuation value is set to 0dB is the measured value of the average noise
level.
a)
Test block diagram and test equipment and instrument
Test block diagram is shown in Figure 5-36.
Microwave analyzer
Figure 5-36 Test Block Diagram for Explicit Average Noise Level and Remaining Response
Testing equipment:
50Ω matcher
b)
Testing steps
1) Connect the 50
matcher to the RF input port of the microwave analyzer according to Figure 5
-36.
2) Set the spectrum analyzer as follows:
Start frequency..........................................................................................................2MHz/10MHz
Stop frequency....................................................................................................................4.5GHz
Load
