Table of Contents
Advertisement
ZXG10-OB06 (V1.0) Integrated Outdoor GSM Base Station Technical Manual
Interface Specifications
Abis Interface
Abis
requirements specified by ITU-T G.703 and ITU-T G.704. Table 8 shows
the basics of Abis interface.
T
A B L E
Prerequisites
Nominal bit rate
Bit rate error tolerance
Signal code pattern
Table 9 shows the electrical features of Abis Interface.
T
A B L E
Electrical Features
Pulse shape
Nominal pulse width
Nominal peak voltage of pulse
(mark)
Peak
voltage
pulse (vacant number)
Amplitude
positive and negative pulse
Digital signal jittering features
(1 UI = 488 ns)
Input impedance features
22
Confidential and Proprietary Information of ZTE CORPORATION
interface
adopts
the
8 – A
I
B
B I S
N T E R F A C E
A S I C S
9 – A
I
E
B I S
N T E R F A C E
L E C T R I C A L
when
without
ratio
between
standard
E1
interface
Values
2048 Kbps
-6
±50×10
HDB3
F
E A T U R E S
Values
Rectangle
244 ns
•
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)
•
At midpoint of pulse width: > 0.955 ~ 1.05
•
At half of nominal pulse amplitude: > 0.95 ~ 1.05
•
1.5 UI (peak-peak value, 20 Hz ~ 100 kHz)
•
0.2 UI (peak-peak value, 18 kHz ~ 100 kHz)
•
2.5% ~ 5% (when it is 51.2 Kbps ~ 102.4 Kbps,
echo attenuation is ≥ 12 dB)
•
5% ~ 100% (when it is 102.4 Kbps ~ 2048 Kbps,
echo attenuation is ≥ 18 dB)
•
100% ~ 150% (when it is 2048 Kbps ~ 3072
Kbps, echo attenuation is ≥ 14 dB)
and
meets
the
Advertisement
Table of Contents
