Code Domain Power Measurement on 3GPP FDD Signals
R&S FSH
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Code Domain Power Measurement on 3GPP FDD Signals
With the option R&S FSH-K4, the R&S FSH3 model 23 (serial number 103500 or later) allows you to
perform the code domain power measurement in accordance with the 3GPP standard.
For analysis, a signal section of approx. 1.2 ms is recorded. In this signal section, the start of a WCDMA
slot is searched for. If the start of such a slot is found in the signal, the CDP analysis for a slot is
performed. The slot to be analyzed is selected at random. The number of the analyzed slot is indicated.
In addition to the total power for a slot, power is measured for the following channels:
•
Common pilot channel (CPICH). This channel is definitely required in the channel configuration;
otherwise no synchronization is possible.
•
Primary common control physical channel (P-CCPCH).
•
Primary synchronization channel (P-SCH).
•
Secondary synchronization channel (S-SCH).
The Symbol EVM and Ec/Io can be measured for the following channels:
•
Common pilot channel (CPICH).
•
Primary common control physical channel (P-CCPCH).
In addition, the carrier frequency error is measured. To obtain sufficient measurement accuracy, it is
necessary to feed the reference frequency of the R&S FSH base station at the EXT REF IN input. See
chapter 1 (External Reference / External Trigger Switchover).
Operation:
Press the MEAS key.
Press the MEASURE softkey.
The R&S FSH opens the menu with the measurement
functions.
Select the 3GPP BTS CDP menu item by using the
rotary knob or the cursor keys.
Confirm selection by using the ENTER key or the
MEAS softkey.
The R&S FSH displays the softkeys for setting the
code domain power.
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