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Modulation Analysis
R&S
®
Cable Rider ZPH
280
User Manual 1321.0950.02 ─ 07
Selection of Audio
Lowpass, DPD (Digi-
tal Predistortion) fil-
ter
Output Sample Rate
Modulating Frequency (Hz)
Maximum Frequency
Minimum Frequency
378
152
0
189
76
0
94
45
0
"DBW/100"
25000
10000
60
12500
5000
30
9640
3250
20
6250
2500
10
3910
1500
0
2500
1000
0
1250
500
0
625
250
0
362
150
0
250
100
0
125
50
0
62
25
0
31
15
0
12.1.3
Performing and Configuring Measurements
After the "Analog Modulation" mode is activated, the R&S Cable Rider ZPH immedi-
ately starts to measure the modulated signals.
12.1.3.1
Analog Modulation
The analog modulation is performed in the AM Domain or FM Domain and the mea-
surement readings are selectable in the "Mod Trace" and "Mod Summary" setting.
●
AM Domain
Measurement is performed on the amplitude modulated signal monitors at the car-
rier frequency.
–
Modulation Trace
Measurement is performed and displayed in the trace window.
–
Modulation Summary
Measurement is performed and displayed in the summary window.
●
FM Domain
Measurement is performed on the frequency modulated signal monitors at the car-
rier frequency.
Analog Demodulation