DAC Monitoring and Control System
User Manual Data Logger and Tower Meter
DL-PDL_General-User-Manual
_ve_2-0-2.docx
Page 38
General Data:
Enter a “RF-Detector Name” at your free choice, recommendation: select the same
name as used in the operator documentation
Enter the “Monitored Service” name related to this RF-interface, e.g.: Channel 45.
Alarm Thresholds:
Set the threshold for a high power PTx alarm indication.
Set the threshold for a low power PTx alarm indication.
Configuration Data:
The configuration data are required to calculate exactly the measured RF-power PTx/PRx. Each
RF-interface is calibrated during the manufacturing process. For configuration the operation
frequency and coupling factor of the directional coupler are entered. If several channels are
transmitted, enter the
average frequency
. Example: 510 MHz and 570 MHz enter 540 MHz.
Automatic calibration step by step procedure:
1. Enter the operation frequency
2. Enter the coupling factor of the directional coupler
Result: The measured power value will automatically adjust to the expected level.
The measured power is accurately displayed on the Dashboard
Due to variation in the installation, the real power could deviate from the displayed value. In this
case, the displayed power level can be adjusted with entering in the field “Correction Factor” a
+/- value to adjust the displayed power.
The measured power is accurately displayed on the Dashboard
Typical power level dashboard display, with 2 alarm thresholds.
Caution
For accurate power value measurement, calibration is tuned for
modulated
signals:
FM: FM - Radio
VHF: for TV signals – in case it is DAB modulated a correction is required
UHF: for TV signals
Measurements with constant wave (CW) in UHF range will be 2.48 dB higher
