Test Procedures R&S SMU200A
1007.9845.82 1.52
E-12
Image Rejection over the Complete Unit
The equipment layout for generating multicarrier signals includes the options R&S B13 (baseband main
module), R&S B10 (baseband generator) and R&S K61 (multicarrier CW).
Test equipment Spectrum Analyzer (Table 1-2, item 24)
Signal generator (Table 1-1, item 5)
Test setup Connect the signal analyzer to the RF output of the DUT.
C
onnect the signal generator’s I/Q-outputs to the I/Q-inputs of
the DUT
Test method The signal generator generates a single sideband signal in the complex
baseband. This signal is fed into the baseband input of the DUT and
modulated with an RF carrier. The image rejection is the difference
between the shifted signal and its mirror on the opposite side of the center
frequency.
Measurement
Settings on DUT
RF On
Frequency: 1 GHz
Level: 0 dBm
I/Q Settings menu:
Source Internal Bas
eband
S
tate On
BB In Settings menu:
State On
Mode analog i
nput
C
rest Factor 0 dB
Peak Level 0 dBfs
Settings on signal generator
RF O
ff
I
/Q Settings menu:
Source Internal Bas
eband
S
tate On
Digital Modulation m
enu:
S
tate On
Data Source All 0
Coding O
ff
M
odulation Type
BPSK
F
ilter Rectangular
Frequency Offset:
10 kHz, 10 MHz to 30 MHz in 10 MHz steps,
-10 kHz, -10 MHz to -30 MHz in -10 MHz steps
(BBIN Off)
Settings on analyzer
FREQ CENTER 1 GHz
SPAN = 3 x offset frequency
BW COUPLING RATIO SPAN / RBW MANUAL 300
AMPT/REF LEVEL 5 dBm
MKR /MARKER 1 set to peak
In the displayed spectrum, use MARKER DELTA to measure
the
i
mage rejection.
The test results should be lower than -40 dBc.
The measurement has to be carried out for each RF path installed in the DUT.
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