Rohde & Schwarz SMU200A - Phase Modulation (Option R&S B20;B22)

R&S SMU200A Test Procedures
1007.9845.82 1.39
E-12
Phase Modulation (Option R&S B20/B22)
PhiM Setting Uncertainty
Test Method
Spectrum Measurement (see chapter "
Test Methodes").
Measurement
 Settings on DUT
:
RF
On
Level 0 dBm:
Phase Modulation menu:
Source Internal
State on
 Settings on spectrum analyzer
:
s
ee chapter "
Test Methodes"
Recommended settings
 CF sw
eep
10
MHz, 250 MHz, 500 MHz, 812 MHz, 940 MHz, 1067 MHz,
1194 MHz, 1321 MHz, 1484 MHz, 2200 MHz, 4000 MHz, 6000 MHz
with fmod = 10 kHz, deviation = 1 rad.
 Deviation sweep
Measurement at CF 500 MHz, f
mod
= 10 kHz,
deviation 1 mrad to 2.5 rad in logarithmic steps,
4 steps per decade (1, 1.8, 3.2, 5.6)
 Repeat measurement at 500 MHz with external modulation.
PhiM Distortion
Test Method
FFT Demodulation (see chapter "
Test Methodes")
Measurement
 Settings on DUT
:
RF
On
Level 0 dBm
Frequency Modulation menu:
LF Gen Frequency 10 kHz
Source Internal
PhiM deviation 1 rad.
 Settings on R&S FSQ
:
s
ee chapter "
Test Methodes"
SWEEP / MEAS TIME 2.5 ms,
FREQ / AF STOP 50 kHz,
AMPTD / REF LEVEL 0 dBm,
FREQ / CENTER test frequency.
 Read THD from the Display. To convert to percent calculate THDpct
= 100 * 10 ^(THDdB/20).
Recommended settings
 CF sw
eep
10
MHz, 250 MHz, 500 MHz, 812 MHz, 940 MHz,
1067 MHz, 1194 MHz, 1321 MHz, 1484 MHz, 2200 MHz,
4000 MHz, 6000 MHz.