Futurecom Systems Group ULC. CMDUHF Manual Do Utilizador

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2.  Set the frequency of operation in  “Receiver Frequency” field and  “Transmitter

Frequency” fields to be equal to the Channel Module downlink transmit frequency.
Frequencies can be entered by typing the value in MHz in the given field and pressing
<Enter>.

 

3.  Set desired output power in “Tx Pwr Pot”.

 

4.  Make sure that the donor site is not transmitting!

 

5.  Key up the Channel Module by setting “PTT” ON.

 

6.  Read “own” “?RSSI”.  The difference between  “Tx PWR Pot” and “own” “?RSSI” is the

Antenna Isolation.

 

7.  Unkey the Channel Module by setting “PTT” OFF.

 

8.  Key up the donor site.

 

9.  Read “donor” “?RSSI”.

If the “donor” “?RSSI” is smaller (i.e. lower RF level) than the “own” “?RSSI”, the desired
gain cannot be realized and the output power must be lowered. All the above steps must be
repeated for the new output power setting until the “own”  “?RSSI” is ~12 dB smaller than
the “donor” “?RSSI”.

If the “donor” “?RSSI” is larger than the “own” “?RSSI”, the Channel Module can be set
up.  Set “RSSI CAS Th” at least 6dB below “donor” “?RSSI” level and at least 6dB higher
than “own” “?RSSI” level.

Uplink is the direction from the Channel Module to the donor base.  The uplink settings are optimized
for a maximum sensitivity - i.e. Front End attenuator should be set to a minimum setting.

12. Set the frequencies of operation in  “Receiver Frequency” and  “Transmitter Frequency”

fields to be equal to donor receive frequency. Frequencies can be entered by typing the value
in MHz in the given field and pressing <Enter>.

 

13. Set desired output power in “Tx Pwr Pot”.

 

14. Key up the Channel Module by setting “PTT” ON.