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TECHNICAL APPENDIX
| TECHNICAL APPENDIX 165
16.11.7
RDS Level
– Low and Windows combined Test (Tuner-1 Tuner-2)
An RF combined signal with one or more frequencies are applied to the tuner1 and/or tuner2 RF inputs. On one
frequency signal Rds Level will be varied to test the alarms the on other ones will be used to fill the scanning list. We
have used for scanning test 100.80MHz (Rds level sweeping) and 100.50MHz(Rds Level stable), RF level >70dBuV.
By slowly changing the Rds Level (in compatible way with the Validation and Hold time chosen) around the test zone,
wait for the alarms and go back up to the starting point.
Tested in Static mode first.
In static mode the alarm rises up after the validation time, a trap will be sent when the status variable changes but with
the time and the Rds value of the first sample out of the range. When the Rds level comes back to the (ok) state another
trap will be sent with the Rds value and the time of the first sample valid.
We have tested in static mode with the following values:
Tested first as "multilevel alarm": RdsLow=Failure and RdsWindow= Out of Nominal Zone ;
RdsLowThr:2.0kHz, RdsThrMin:2.5kHz, RdsThrMax:3.5kHz Hyst: 0.3kHz, Validation:2sec, Hold:2Sec
RdsLowThr:2.0kHz, RdsThrMin:2.5kHz, RdsThrMax:3.5kHz Hyst: 0.3kHz, Validation:20sec, Hold:10Sec
RdsLowThr:2.0kHz, RdsThrMin:2.5kHz, RdsThrMax:3.5kHz Hyst: 0.3kHz, Validation:180sec, Hold:60Sec
Tested then as: RdsLow=LowThr and RdsWindow=MaxThr;
RdsLowThr:2.0kHz, RdsThrMin:0.0kHz, RdsThrMax:3.5kHz Hyst: 0.3kHz, Validation:2sec, Hold:2Sec
RdsLowThr:2.0kHz, RdsThrMin:0.0kHz, RdsThrMax:3.5kHz Hyst: 0.3kHz, Validation:20sec, Hold:10Sec
RdsLowThr:2.0kHz, RdsThrMin:0.0kHz, RdsThrMax:3.5kHz Hyst: 0.3kHz, Validation:180sec, Hold:60Sec
The behavior observed in dynamic nominal conditions (75kHz deviation, Mid audio compression/power, varied audio
contents) has been compatible with the specifications with an accuracy error on the measure of about -0.1 kHz to
+0.2kHz and timing errors of about 1-2 seconds
Typical Accuracy expected in general (RF Level > 70dBuV):
Min Rds Level value readable : +0.5 kHz, Max Rds Level value readable: +10.0 kHz
Accuracy: -0.1kHz +0.3kHz (Mid-High mpx power, Dev<80Khz, TDF default, see Notes)
Accuracy: -0.1kHz +0.2kHz (Low mpx power, Dev<80Khz, MB default, see Notes)
Accuracy: -0.1kHz +0.4kHz, (High mpx power,Dev>100Khz, see Notes)