User's Manual

SZZJ-A10~17LF-LCPA User
Manual
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Fix the donor antenna after selecting the best position, and adjust slightly its height or angles in
order to get the signals with suitable input power level and calling quality.
⚫ System Requirement of GSM or PCS
1) The total input power level shall be around -50dBm, lowest shall be more than –80dBm
2) Test by mobile phone or data card by 3~5 times to make sure the calling quality is good at
95% of the time, and no handovers.
3) It is requested that the leading BCCH shall be 6dB higher than the second BCCH in order
to avoid call drops (for professional engineering reference only).
⚫ System Requirement of CDMA or AWS
1) The input power level shall be around -55 ~ -60dBm (it is less than GSM or DCS because
of breathing effect), the lowest shall be more than –90dBm.
2) Test by mobile phone or data card by 3~5 times to make sure that Ec/Io is more than –7dB,
and no handovers.
3) Ec/Io of adjacent carrier shall be 8dB less than that of donor carrier to avoid soft handover.
The active PN shall be only 1.
7.5. Cable layout and connector assembly
1) Keep the type, specifications, routing direction, location, and curvature radius of cables in compliance with
the design requirement. Place cables in good order, bend them smoothly, and protect the outer skin against
any damage.
2) Bind cables in good order when laying them on cable racks. When leading cables in or out of troughs, use
a hole-opener to open cable troughs and then install PVC lock-nuts to protect them.
3) Keep horizontal cables straight and fasten them stably with a fixing clip every 1 to 1.5 meters, with a proper
stress.
4) Bind and fasten vertical cables every two to three meters to avoid damaging cables or connectors owing to
their own heavy weight. Take back the cables and re-lay them when you have difficulty in pulling them, and
avoid using a strong force to pull them.
5) Separate RF cables from power cables. Take proper isolation measures if they have to be placed on the
same cable racks owing to the site condition restriction.
6) Correctly fasten all connection parts of the whole system, from the antenna to active interfaces to passive
interfaces, and keep electrical interfaces well contacted. Give waterproof treatment to outdoor connection
parts.