Rohde & Schwarz SML01 - AM Total Harmonic Distortion

R&S®SML / R&S®SMV03 Test sequence
1090.3123.12 10.21 E-6
AM total harmonic distortion
Test setup  Test setup 1, demodulator mode
Settings on the R&S
SML01
- LEVEL:
2.1 dBm, 6 dBm
with R&S SML-B10: 16 dBm
- FREQ:
100 kHz, 5 MHz, 5.1 MHz, 76 MHz, 100 MHz, 200 MHz, 500 MHz,
800 MHz, 1100 MHz
- MODULATION  AM  AM DEPTH: 30 %, 80 %
AM SOURCE: LFGen
LFGenFreq = 1 kHz
Settings on the R&S
SML02/03 / R&S SMV03
- LEVEL:
0.1 dBm, 6 dBm
with R&S SML-B10: 16 dBm
- FREQ:
in addition to the test frequencies for R&S SML01 > 5 MHz:
2000 MHz, 2200 MHz, 2800 MHz, 3000 MHz
- MODULATION  AM  AM DEPTH: 30 %, 80 %
AM SOURCE: LFGen
LFGenFreq = 1 kHz
Settings with option B3 - FREQ:
only test frequencies > 10 MHz
Settings on the test receiver - D
emodulation: AM
- D
etector: Peak
- Activate THD & SINAD
Measurement  Read off the THD value from the test receiver and use the formula
%100
10
1
20
•=

THD
k
to convert to the total harmonic distortion.
With settings of 2.1 dBm (R&S SML02/03: 0.1 dBm) with deviation =
30 % and 6 dBm with deviation = 80 %, simply measure across the
frequency range.