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TECHNICAL APPENDIX
| TECHNICAL APPENDIX 151
16.11.2
RF-L1 Monitor 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 RF
level will be varied to test the alarms the other ones will be used to fill the scanning list. We have used 100.80MHz (RF
sweeping) and 100.50MHz(RF stable).
By slowly changing the RF levels (compatibly with the chosen Validation and Hold time) around the test zone, wait for the
alarms and go back up to the starting point.
Test is in Static mode first.
In static mode the alarm rises up after the validation time. When the status variable changes a trap will be sent with time
and RF values of the first sample out of the range. When the RF level is greater or equal to THR+ Hysteresis, the status
alarm after the hold time comes back to the (ok) state and another trap will be sent with the RF value and time of the first
valid sample.
The following values have been tested in static mode:
Thr: +50dBuV, Hyst: +3dBuV, Validation:2sec, Hold:2Sec
Thr: +50dBuV, Hyst: +3dBuV, Validation:20sec, Hold:10Sec
Thr: +50dBuV, Hyst: +3dBuV, Validation:180sec, Hold:60Sec
The observed behavior resulted to be compatible with the specifications with an accuracy error on the measure of about
1 dBuV and timing errors of about 1-2 seconds
Typical Accuracy and Precision expected in general:
Min RF value readable : -6 dBuV, Max RF value readable: +123 dBuV
Accuracy: +-3 dBuV, Precision +-2 dBuV (Range -6 dBuV to +19 dBuV)
Accuracy: +-2 dBuV, Precision +-1 dBuV (Range +20 dBuV to +79 dBuV)
Accuracy: +-3 dBuV, Precision +-3 dBuV (Range +80 dBuV to +123 dBuV)
Under the alarm condition the RF alarm led on the panel must be on (not flashing) and clicking on the channel number of
the correspondent tuner the RF error will be displayed. (“RF_LEV_L1”)