Rohde & Schwarz SME02 - GMSK Modulation; Spectrum

Test Procedure SME
1038.6002.02 5.34 E-13
5.2.35 GMSK Modulation
5.2.35.1 Spectrum
Test equipment Spectrum analyzer (Section 5.1, item 2)
Test setup Connect the spectrum analyzer to the RF output socket of the SME.
Measurement À Settings at the SME
- Carrier frequency 900 MHz,
- Level 0 dBm
in menu DIGITAL MOD/GMSK
- SOURCE PRBS
- PRBS 23 bit
- SELECT STANDARD GSM.
À Settings at the spectrum analyzer
- Center frequency 900 MHz,
- Span 1 MHz,
- Resolution bandwidth 10 kHz,
- Video bandwidth 10 Hz.
A spectrum according to Fig. 5-3 must be visible at the spectrum
analyzer.
[dBm]
899,5 900 900,5
[MHz]
0
-50
-100
Fig. 5-3 Spectrum with GMSK