ZXG10-BTS (V2.9) Technical Manual
22
Confidential and Proprietary Information of ZTE CORPORATION
3 V (120 ohm, a pair of symmetrical cables).
iii. Peak voltage when without pulse (vacant number):
0±0.237 V (75 ohm, one pair of coaxial cables).
0.3 V (120 ohm, a pair of symmetrical cables).
iv. Nominal pulse duration: 244 ns
v. The amplitude ratio between the positive pulse and the negative
pulse
The amplitude ratio of positive and negative pulses is at the
intermediate point in pulse duration: superior than 0.955 ~ 1.05
Positive and negative pulse duration ratio at half nominal pulse
amplitude: superior than 0.95 ~ 1.05
vi. Digital signal jittering features (1UI = 488ns):
1.5 UI (peak-peak value, 20 Hz ~ 100 kHz).
0.2 UI (peak-peak value, 18 Hz ~ 100 kHz).
vii. Input impedance features
Corresponding to the nominal bit rate (2,048 Kbit/s) 2.5% ~ 5%;
that is, when it is 51.2 Kbit/s ~ 102.4 Kbit/s, echo attenuation
≥
12 dB.
Corresponding to the nominal bit rate (2,048 Kbit/s) 5% ~ 100%;
that is, when it is 102.4 Kbit/s ~ 2,048 Kbit/s, echo attenuation
≥
18 dB.
Corresponding to the nominal bit rate (2,048 Kbit/s) 100% ~ 150%;
that is, when it is 2,048 Kbit/s ~ 3072 Kbit/s, echo attenuation
≥
14 dB.
Um Interface Indices
Main indices are as follows:
1. Wireless channel
Co-channel interference protection ratio C/I
≥
9 dB (static).
Interference protection ratio of the adjacent channels
≥
- 9 dB
Interference protection ratio the second adjacent channel
≥
-43 dB
The wireless channel selection adopts the shared signaling channel
mode.
2. Wireless RF modulation mode
It adopts gauss minimal shift keying (GMSK) to perform modulation.
BT = 0.3 and the modulation coefficient is 1.35.
3. Performance of the transmitter
i. Phase error of the transmitter
The phase error of the transmitter is the error between the actual
phase and the theoretical one.
Summary of Contents for ZXG10-BTS
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