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3. Installation and configuration
3.1 Equalise power levels Dish 1 and 2.
Before RF cables from both dishes are connected to the DDS, make sure the dBµV
power levels from both dishes should be equalised in power. For example with amplifier or
attenuator set both levels on 70 dBµV.
3.2 Level detection
When main power and RF cables are connected, the software starts and will display the
measured signal levels from Dish 1 and Dish 2.
If the detector has no signal or a level that is too low, display will show <43 dB µV.
If the level is too high display will show >84 dBµV
The level displayed is in dB µV units, this level displayed cannot be compared to the levels
that one would read from a spectrum analyzer. The used level detection measures the RF
power across the entire L-band instead of a single transponder.
3.3 Calibration
Calibration is done in factory, and DDS can be immediately used after installation.
Although after reset in menu or firmware update the DDS should be calibrated again to
measure the difference between the 2 input detectors inside the DDS.
Calibration must be done with 1 antenna with a minimum 2 outputs, connected to both
detector dish 1 and detector dish 2.
How to calibrate?:
1. Align dish with twin or quad output LNB to satellite.
2. Set the dBµV power from the 2 outputs from dish equal. (for example with amplifier
or attenuator set both outputs 70 dbµV)
3. Connect LNB output 1 to DDS detector dish 1
4. Connect LNB output 2 to DDS detector dish 2
5. Enter the installation menu by pressing the <Enter> ( ) and <Esc> ( ) keys for
4 seconds.
6. Then scroll down the menu pressing the ↓ key until Calibrate is displayed.
7. Then press <Enter> to start the calibration routine.
At this point the control unit reads the RF-signals and compared against each other
and stored into non volatile memory.
If calibration is done leave the menu by pressing <Esc>.
