SI47XX-EVB Datasheet, PDF (75/164 Pages) Silicon Laboratories – Thank you for purchasing the Silicon Laboratories

Si47xx-EVB
Table 17. FM Receiver Settings RDS Window Descriptions
#
Items
Description
1 Radio Data Service _{PS: Program Service Indicator (8 characters).}
RT: Radio Text Indicator (64 characters).
eRT: Enhanced Radio Text Indicator
CT: Clock Indicator showing time, day, and date.
Group Error Rate indicates the percentage of uncorrectable groups received.
PTY: Program Type Indicator
PI: PI Code Indicator
2
Sync Times _{Time required to synchronize, display radio text, and display program service.}
3
RDS
Indicates that RDS is synchronized.
Synchronization
Indicator
4
Alternate
When present, shows a list of alternate frequencies. Alternate frequency methods A and
Frequency B are supported.
Indicator
5 Group Counters _{Provides the total number and percentage breakdown of group types 0–15, A/B. To view}
this information, select WindowRDS Group Counters. Please refer to Figure 58.
6 Block Counters _{Provides the block error rates after tune and after RDS Sync.}
After Tune Error Rate: After tune (STC interrupt), the ideal number of blocks the FM
tuner should have received is calculated. Also, the number of accepted blocks and
errors are calculated.
Error Rate = number of errors / number of ideal blocks after tune.
After Sync Error Rate: After RDS Sync (RDS interrupt), the ideal number of blocks the
FM tuner should have received is calculated. Also, the number of accepted blocks and
errors are calculated.
Error Rate = number of errors / number of ideal blocks after sync
Because it usually takes 100~200ms for the FM tuner to synchronize to RDS data (STC
interrupt always comes before RDS interrupt), "After Tune Error Rate" will always be
greater than "After Sync Error Rate." After a long time, both error rates should
consolidate at similar levels.
7
Reset
Resets the block counter numbers.
8 Radio Text Plus _{Radio Text Plus (RT+) Class and Item Information Indicator}
Rev. 0.8
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