Rohde & Schwarz CMU-K20, Руководство по эксплуатации

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Non Signalling: Spectrum Measurements CMU-K20/K21/K22/K23/K24
1115.6088.12 4.62 E-11
Cont. Stat. Mode The Cont. Stat. Mode parameter defines the analyzer settings for the Spectrum due
to Switching measurement:
Peak Hold The switching transients are equal to the maximum MS level
measured, only updated after a new measurement is started
Statistic Count The switching transients are equal to the peak value over one
measurement cycle (statistic count), updated after each cycle.
Both settings are equivalent for single shot measurements.
Remote control
CONFigure:SPECtrum:SWITching[:GMSK]:CSMode
CONFigure:SPECtrum:SWITching:EPSK:CSMode
PHOL | SCO
Tolerance Values (Spectrum Configuration – Limit Lines)
The tab Limit Lines defines upper limits for the output spectrum around the RF carrier frequency. All
relative limit values are referred to the actual carrier output power of the base station.
a) Spectrum due to Modulation
The limit lines for the spectrum due to modulation as specified in GSM 05.05 and GSM 11.10 depend
on the GSM band, the frequency, and (for frequencies that differ from the carrier frequency by more
than 400 kHz) on the output power of the mobile station. The following values apply up to a frequency
offset of 1.8 MHz:
Table 4-1 GSM tolerances for spectrum due to modulation
GSM400/850/900
Relative power at MS output power
GSM1800/1900
Relative power at MS output power
Frequency offset / [MHz]
≤
33 dBm (in dBc)
≥
39 dBm (in dBc)
≤
24 dBm (in dBc)
≥
36 dBm (in dBc)
0.1 +0.5 +0.5 +0.5 +0.5
0.2 –30 –30 –30 –30
0.25 –33 –33 –33 –33
0.4 –60 (GMSK mod.)
–54 (8PSK mod.) –60 –60 (GMSK mod.)
–54/–60 (8PSK mod.)
3
–60
≥
0.6,
≤
1.8
–60 –66 –60 –60
3
For equipment supporting 8PSK, the limit of –54 dBc applies to MS output powers up to +30 dBm, –60 dBm to MS output powers above +30 dBm.
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