LTE Multi Evaluation Measurement
R&S
®
CMW-KM5xx/-KS5xx
542
User Manual 1173.9628.02 ─ 16
●
Select a band and enter a channel number valid for this band. The R&S
CMW cal-
culates the resulting frequency.
In the Standalone (SA) scenario, these parameters are controlled by the measurement.
In the Combined Signal Path (CSP) scenario, they are controlled by the signaling appli-
cation.
Remote command:
(SA)
(SA)
(CSP)
(CSP)
Frequency Offset
Positive or negative frequency offset to be added to the specified center frequency of
the RF analyzer.
In the Standalone (SA) scenario, this parameter is controlled by the measurement. In
the Combined Signal Path (CSP) scenario, it is controlled by the signaling application.
Remote command:
(SA)
(CSP)
Expected Nominal Power
Defines the nominal power of the RF signal to be measured. An appropriate value for
LTE signals is the peak output power at the DUT during the measurement. The "Ref.
Level" is calculated as follows:
Reference level = Expected Nominal Power + User Margin
Note:
The actual input power at the connectors (i.e. the "Reference Level" minus the
"External Attenuation (Input)" value, if all power settings are configured correctly) must
be within the level range of the selected RF input connector; refer to the data sheet.
In the Standalone (SA) scenario, this parameter is controlled by the measurement. In
the Combined Signal Path (CSP) scenario, it is controlled by the signaling application.
Remote command:
(SA)
(CSP)
(CSP)
User Margin
Margin that the R&S
CMW adds to the "Expected Nominal Power" in order to deter-
mine its reference power ("Ref. Level"). The "User Margin" is typically used to account
for the known variations of the RF input signal power, e.g. the variations due to a spe-
cific channel configuration.
The variations (crest factor) depend on the LTE signal parameters, in particular the
modulation scheme. If the "Expected Nominal Power" is set to the peak power during
the measurement, a 0 dB user margin is sufficient.
GUI Reference
深圳德标仪器
135-1095-0799