Um Interface - Zte ZXG10-OB06 Technical Manual

Um Interface

Wir e le ss C ha nnel
Main characteristics are as follows:
• Co-channel interference protection ratio (static): C/I ≥ 9 dB
• Interference protection ratio of the adjacent channels: ≥ -9 dB
• Interference protection ratio of the second adjacent channel: ≥ -43
dB
Wir e le ss R F Modul ati on Mode
ZXG10-OB06 possess MCS-1 ~ MCS-9 modulation and coding modes to
support EDGE services. MCS-1 ~ MCS-4 retains the GMSK modulation
mode, while MCS-5 ~ MCS-9 uses the 8PSK modulation mode. 8PSK
allows 3-bit data over each modulation signal on a wireless path, whereas
GMSK allows 1-bit data under the same conditions.
Different coding modes define different sizes of data blocks and channel
redundancy codes. In comparison with GPRS that features a mono
modulation technique, EDGE is capable of adapting to a more adverse and
wider wireless propagation environment.
Transmitter Performance
The following characteristics describe the transmitter performance:
• Transmitter phase error:
• Phase error of the transmitter is the error between the actual phase
and the theoretical one.
• Root Mean Square of the BTS phase error less than 5° and the
peak value not over 20°.
• Transmitter frequency error:
• Transmitter frequency error is the error between the actual
frequency and the theoretical one.
• BTS frequency error is less than 0.05 ppm.
• Average transmitted carrier power (power amplifier output requirement:
40 W or 80 W):
• There is 6-level static power control function. It can adjust
downwards six power levels with the step of 2 dB ± 1.0 dB, based
on the maximum output power. At the same time, BTS has the
downlink power-control function. It can decrease the power from
level zero to level 15 with the step of 2dB ± 1.5dB, based on the
set power level.
• Specifications compliant with GSM 11.21 and GSM 05.05 are as follows:
• Transmitted RF carrier power/time envelop
Confidential and Proprietary Information of ZTE CORPORATION
Chapter 2 - Technical Specifications
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