Rohde & Schwarz SME02 - Modulation Depth of am; AM Frequency Response

Test Procedure SME
1038.6002.02 5.20 E-13
5.2.16 Modulation Depth of AM
Test equipment Test system 5.1.1.1
Test system 5.1.1.6 (SME06)
Measurement
À Settings at the SME
- Level 0 dBm
- Select LFGEN1 in the MODULATION/AM/AM SOURCE INT
menu,
- Modulation depth 0.1% to 80%
(recommended values 30% and 80%)
- Modulation frequency 1 kHz
À Vary the carrier frequency from 5 MHz to 1500 MHz (2200/
3000/6000 MHz with SME03E/03/06). For recommended setting
values, see table 5-2.
À Read off the modulation depth at the modulation analyzer.
Deviation of the modulation depth measured from the setting value
m
5.2.17 AM Frequency Response
Test equipment
Test system 5.1.1.2
Test system 5.1.1.6 (SME06)
Measurement
À Settings at the SME
- Level 0 dBm,
- Select EXT1 in the MODULATION/AM/AM SOURCE menu,
- Modulation depth 60%.
À Vary the carrier frequency from 5kHz to 1500MHz (2200/
3000/6000MHz with SME03E/03/06). For recommended setting
values, see table 5-2.
À Setting at the audio analyzer
- Generator level 1 V(u
peak
).
À Determine the modulation frequency response (difference between
the highest and the lowest modulation depth) by varying the
generator frequency.
Modulation frequency response from 20 Hz to 50 kHz .......max.1dB
Note: If option SM-B2 LF generator is fitted, LFGEN2 can be selected in the MODULATION/AM/AM
SOURCE menu and the test frequency be set using the internal generator for this
measurement.