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TECHNICAL APPENDIX
| TECHNICAL APPENDIX 161
16.11.6
Pilot 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. One carrier the
pilot level will be varied to test the alarms the other ones will be used to fill the scanning list with a stable pilot level. We
have used for scanning test 100.80MHz (Pilot sweeping) and 100.50MHz(Pilot stable), RF level >70dBuV.
By slowly changing the Pilot (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 Pilot value of the first sample out of the range. When the Pilot level comes back to the (ok) state another
trap will be sent with the Pilot value and the time of the first sample valid.
We have tested in static mode with the following values:
Tested first as "multilevel alarm": PilotLow=Failure and PilotWindow=Out of Nominal Zone ;
PilotLowThr:5.0kHz, PilotThrMin:6.0kHz, PilotThrMax:7.0kHz Hyst: 0.3kHz, Validation:2sec, Hold:2Sec
PilotLowThr:5.0kHz, PilotThrMin:6.0kHz, PilotThrMax:7.0kHz Hyst: 0.3kHz, Validation:20sec, Hold:10Sec
PilotLowThr:5.0kHz, PilotThrMin:6.0kHz, PilotThrMax:7.0kHz Hyst: 0.3kHz, Validation:180sec, Hold:60Sec
Tested then as: PilotLow=LowThr and PilotWindow=MaxThr;
PilotLowThr:6.0kHz, PilotThrMin:0.0kHz, PilotThrMax:7.0kHz Hyst: 0.3kHz, Validation:2sec, Hold:2Sec
PilotLowThr:6.0kHz, PilotThrMin:0.0kHz, PilotThrMax:7.0kHz Hyst: 0.3kHz, Validation:20sec, Hold:10Sec
PilotLowThr:6.0kHz, PilotThrMin:0.0kHz, PilotThrMax:7.0kHz 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 and
timing errors of about 1-2 seconds.
Typical Accuracy expected in general (RF Level > 70dBuV):
Min Pilot Level value readable : +0.3 kHz, Max Pilot level value readable: +10.0 kHz
Accuracy: +-0.2 kHz (Mid mpx power, Dev<80Khz, TDF default, see Notes)
Accuracy: -0.1kHz +0.3kHz, (High mpx power, Dev>100Khz, see Notes)
Accuracy: +-0.2 kHz , (Low mpx power, Dev<80Khz, MB default, see Notes)