Huawei Airbridge BTS3612A-1900 Technical Manual page 103

Technical Manual
Airbridge BTS3612A CDMA Base Station
The R-TCH
-127dBm/1.23MHz~-65dBm/1.23MHz CDMA signal level is inputted at BTS RF main
and diversity input ports.
III. Single-tone desensitization
450MHz band
Input the single-tone interference deviated from the center frequency at the BTS RF
input port: when the single-tone interference deviates from the center frequency
+900kHz and -900kHz, the input single-tone interference power is 87dB higher than the
output power of the mobile station simulator.
When R-TCH FER maintains <1.5%, the output power of mobile station simulator
changes less than 3dB whether there is single-tone interference or not.
800MHz band
Input the single-tone interference deviated from the center frequency at the BTS RF
input port: when the single-tone interference deviates from the center frequency about
+750kHz and -750kHz, the input single-tone interference power is 50dB higher than the
output power of the mobile station simulator; when the single-tone interference
deviates from the center frequency +900kHz and -900kHz, the input single-tone
interference power is 87dB higher than the output power of the mobile station simulator.
When R-TCH FER maintains <1.5%, the output power of mobile station simulator
changes less than 3dB whether there is single-tone interference or not.
1900MHz band
Input the single-tone interference deviated from the center frequency at the BTS RF
input port: when the single-tone interference deviates from the center frequency
+1.25MHz and -1.25MHz, the input single-tone interference power is 80dB higher than
the output power of the mobile station simulator.
When R-TCH FER maintains <1.5%, the output power of mobile station simulator
changes less than 3dB whether there is single-tone interference or not.
IV. Intermodulation spurious response attenuation
450MHz band and 800MHz band
Input two single-tone interference of center frequency at the BTS RF input port: both
deviate from the center frequency +900kHz and +1700kHz respectively, and -900kHz
and -1700kHz respectively, the input single-tone interference power is 72dB higher
than the output power of the mobile station simulator.
When R-TCH FER keeps <1.5%, the output power of the mobile station simulator
changes less than 3dB whether there are two single-tone interference or no
interference.
Appendix A Performance of Receiver and Transmitter
FER shall be 1.0%
A-11
or less with 95%
System Principle
confidence when