ZTE Corporation ZXG-OB06 Manuale Utente

 
ZXG10 OB06 ZTE  Integrated Outdoor GSM Base Station Technical Manual 

Confidential and Proprietary Information of ZTE CORPORATION 

Requirements for Atmospheric Pressure 

70×10

3

~106×10

3 

pa. 

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.  Nominal bit rate: 2048 kb/s 
ii.  Bit rate error tolerance: ±50×10

-6

 

iii.  Signal code pattern: HDB3 

2. Electrical features: 

i.  Pulse shape: rectangle 
ii.  Nominal peak voltage of pulse (mark): 

2.37V (75 ohm, a pair of coaxial cables). 
3 V (120 ohm, a pair of symmetrical cables). 

iii.  Peak voltage when without pulse (vacant number): 

0±0.237V (75 ohm, one pair of coaxial cables). 
3 V (120 ohm, one pair of symmetrical cables). 

iv.  Nominal pulse width: 244 ns 
v.  The amplitude ratio between the positive pulse and the negative 

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. 

vi. Digital signal jittering features (1UI = 488 ns): 

1.5UI (peak-peak value, 20 Hz~100 kHz). 
0.2UI (peak-peak value, 18 kHz~100 kHz). 

vii. Input impedance features 

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.