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ZXG10 OB06 ZTE Integrated Outdoor GSM Base Station Technical Manual
Requirements for Atmospheric Pressure
70×10
Interface Indexes
Abis Interface Indexes
The Abis interface adopts the standard E1 interface.
The performance of the Abis interface meets the requirements specified by
ITU-T G.703 and ITU-T G.704. Details are as follows:
1. Prerequisites
i.
ii. Bit rate error tolerance: ±50×10
iii. Signal code pattern: HDB3
2. Electrical features:
i.
ii. Nominal peak voltage of pulse (mark):
iii. Peak voltage when without pulse (vacant number):
iv. Nominal pulse width: 244 ns
v. The amplitude ratio between the positive pulse and the negative
vi. Digital signal jittering features (1UI = 488 ns):
vii. Input impedance features
20
Confidential and Proprietary Information of ZTE CORPORATION
3
3
~106×10
pa.
Nominal bit rate: 2048 kb/s
Pulse shape: rectangle
2.37V (75 ohm, a pair of coaxial cables).
3 V (120 ohm, a pair of symmetrical cables).
0±0.237V (75 ohm, one pair of coaxial cables).
3 V (120 ohm, one pair of symmetrical cables).
pulse
The amplitude ratio of the positive pulse to the negative one at the
midpoint of the pulse width is superior to 0.955–1.05.
The amplitude ratio of the positive pulse to the negative pulse at
the half of the nominal pulse amplitude is superior to 0.95–1.05.
1.5UI (peak-peak value, 20 Hz~100 kHz).
0.2UI (peak-peak value, 18 kHz~100 kHz).
Corresponding to the nominal bit rate (2048 kb/s) 2.5% ~ 5%,
that is, when it is 51.2 kb/s~102.4 kb/s, echo attenuation ≥12 dB.
Corresponding to the nominal bit rate (2048 kb/s) 5% ~ 100%,
that is, when it is 102.4 kb/s~2048 kb/s, echo attenuation ≥18 dB.
-6
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