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Technical Manual
Airbridge BTS3612A CDMA Base Station
Channels, the pilot time tolerance of all CDMA Channels radiated by a BTS shall be
within ±1 µs of each other.
Time tolerance of pilot channel and other code-division channels: in the same CDMA
channel, time error between the pilot channel and other forwarding code-division
channels is <!50ns.
The phase differences between the Pilot Channel and all other code channels sharing
the same Forward CDMA Channel should not exceed 0.05 radians and shall not
exceed 0.15 radians.
II. Waveform quality
The normalized cross correlation coefficient, ρ, shall be greater than 0.912 (excess
power < 0.4 dB)..
A.2.3 RF Output Power
I. Total power
Total power is the mean power delivered to a load with resistance equal to the nominal
load impedance of the transmitter.. The total power of this system is +43dBm (20W),
the deviation in all kinds of environmental conditions shall not exceed +2dB and -4dB.
II. Pilot power
The Pilot Channel power to total power ratio shall be within ±0.5 dB of the configured
value.
III. Code domain power
For RC1and RC2, the code domain power in each inactive W
or more below the total output power.
For RC3 and RC4, the code domain power in each inactive W
dB or more below the total output power.
For RC1 and RC2, the code domain power in each inactive W
dB or more below the total output power of each carrier.
Appendix A Performance of Receiver and Transmitter
A-14
System Principle
64
channel shall be 27 dB
n
128
channel shall be 30
n
256
channel shall be 33
n
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