Rohde & Schwarz R&S FSL3 - 3 GPP Base Station Measurements (K72) - Status Reporting System; Status:questionable:sync Register

R&S FSL 3GPP Base Station Measurements (K72) – Status Reporting System
1300.2519.12 5.39 E-11
3GPP Base Station Measurements (K72) – Status
Reporting System
Additionally to the registers provided by the base system, the following registers are used or modified in
the 3GPP Base Station Measurements option (K72):
• STATus:QUEStionable:SYNC Register
Although this register is provided by the base system, the 3GPP Base Station Measurements option
(K72) uses different bits and definitions.
Detailed information on the status registers of the base system is given in section Status Reporting
System. In this section, only the new and altered status registers / bits for the 3GPP Base Station
Measurements option (K72) are described.
This option is available from firmware version 1.60.
STATus:QUEStionable:SYNC Register
This register contains information about failed synchronization and incorrect pilot symbols.
The bits can be queried with commands
STATus:QUEStionable:SYNC:CONDition?
and
STATus:QUEStionable:SYNC[:EVENt]?
.
Bit No Meaning
0 This bit is not used.
1
K72/K74 Frame Sync failed
This bit is set when synchronization is not possible within the application.
Possible reasons:
• Incorrectly set frequency
• Incorrectly set level
• Incorrectly set scrambling code
• Incorrectly set values for Invert Q
• Invalid signal at input
2 to 4 These bits are not used.
5
K72/K74 Incorrect Pilot Symbol
This bit is set when one or more of the received pilot symbols are not equal to the
specified pilot symbols of the 3GPP standard.
Possible reasons:
• Incorrectly sent pilot symbols in the received frame.
• Low signal to noise ratio (SNR) of the WCDMA signal.
• One or more code channels have a significantly lower power level compared to the
total power. The incorrect pilots are detected in these channels because of low
channel SNR.
• One or more channels are sent with high power ramping. In slots with low relative
power to total power, the pilot symbols might be detected incorrectly (check the
signal quality by using the symbol constellation display).
6 to 14 These bits are not used.
15 This bit is always 0.