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WCDMA Signaling
R&S
®
CMW-KG4xx/-KM4xx/-KS4xx
146
User Manual 1173.9657.02 ─ 11
External Attenuation ← RF Input (RX)
Defines the value of an external attenuation (or gain, if the value is negative) in the
input path. The power readings of the R&S
CMW are corrected by the external attenu-
ation value.
The external attenuation value is also used in the calculation of the maximum input
power that the R&S
CMW can measure.
If a correction table for frequency-dependent attenuation is active for the chosen con-
nector, then the table name and a button are displayed. Press the button to display the
table entries.
Remote command:
External Delay Compensation ← RF Input (RX)
Defines the value of an external time delay in the input path, for example caused by a
very long optical fiber cable.
The signaling application uses this information to compensate for the delay and to syn-
chronize the uplink and the downlink in spite of the delay.
Remote command:
2.4.7.2
RF Frequency
This section configures the operating band and channel/frequency for uplink and down-
link.
Fig. 2-54: Frequency settings (dual carrier)
Operating Band, Channel, Frequency, Offset, UL/DL Separation
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.............................................................................................. 147
Operating Band, Channel, Frequency, Offset, UL/DL Separation
"Uplink Channel" specifies the center frequency of the RF analyzer and "Downlink
Channel" the center frequency of the generated WCDMA signal.
To specify the center frequencies, select an operating band first, then enter a valid
channel number or frequency for uplink or downlink. The related frequency or channel
number, UL/DL separation and the parameters for the other direction are calculated
automatically.
GUI Reference
深圳德标仪器
135-1095-0799