R&S SMU200A Test Procedures
1007.9845.82 1.77
E-12
Measurement As a reference perform the measurement 1 of chapter “GSM and
GSM Normal Burst” at RF = 910 MHz. Denote results of phase error
and EVM.
Now the Baseband has to shift its output in frequency.
Source1:bb:foff 1000 Hz
Now the Fader has to be set to Pure Doppler Shift in one channel of
one path to counteract the above shift
Formula:
f(doppler) = f(RF) * speed / c ; c = speed of light = 299792458 m/s
Settings on DUT
Source1:fsim:path1:stat off
Source1:fsim:rout famaxa
Source1:fsim:speed:unit mps
Source1:fsim:del:group1:path1:speed 272.8111
Source1:fsim:del:group1:path1:prof pdopp
Source1:fsim:del:group1:path1:stat on
Source1:fsim:stat on
Perform above measurement again
No signal degradations may occur, same readings in the limits of
measurement uncertainty are to be obtained.
If installed, repeat the test with Fader Extension B15.
a) if DACB B is installed, use Channel B
b) if no DAC B is installed, use Group 5, Path 1
If no UNICOD is available, perform this test with an external
baseband source.
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