1. Overview
The Digital Channel Selective Repeaters is a new type wireless signal coverage equipment. It adopts digital processing technology, and reduces the active modules, improves reliability greatly.
The Digital Channel Selective Repeaters improves coverage of GSM network greatly without adding new base stations. It has high cost performance, compatibility, expansibility, reliability, stability and high linearity.
l Adopted digital channel selective technology, getting better out of band rejection, improved EVM, optimized voice performance.
l Reduced system NF(noise figure).weakened up link noise floor
l Improved reliability greatly, the digital processing technology reduced active modules remarkably, the MTBF more longer.；
l Adopted high speed and bigger dynamitic ranged ADC/DAC technology, gotten better voice performance.
l Adopted full-sealed shell, water proof, moisture proof, anticorrosive, all-weather using
3. Using condition
1) Working temperature: -25℃～+55℃；
2) Storage temperature储存温度: -40℃～+85℃；
3) Humidity：≤95％；
4) Air pressure：70kpa～106kpa；
5) Power supply: AC220V±20%，50±5Hz；
4. Main specifications
表2 GSM(中国移动)数字选频直放站主要技术指标
|
No. |
Item |
Parameters |
|
Down link |
Up link |
|
1 |
Frequency |
930MHz～954MHz |
885MHz～909MHz |
|
1805MHz～1830MHz |
1710MHz～1735MHz |
|
2 |
Bandwidth |
200kHz |
200kHz |
|
3 |
Channel number |
8～16 |
8～16 |
|
4 |
Max. Output power |
10W |
40±2dBm |
30±2dBm |
|
20W |
43±2dBm |
|
40W |
46±2dBm |
37±2dBm |
|
60W |
48±2dBm |
|
5 |
Gain |
95±3dB |
90±3dB |
|
6 |
Gain adjust range/step |
31dB/1dB |
|
7 |
Gain adjust error |
@ 0～20dB，Error≤1dB；@21～31dB时，Error≤1.5dB |
|
8 |
NF. |
≤4dB |
≤4dB |
|
9 |
Max. Input power |
10dBm |
-10dBm |
|
10 |
Auto Level control（ALC） |
ALC range≥15dB |
|
11 |
Gain flatness |
≤3dB |
|
12 |
In/out VSWR |
≤1.5 |
|
13 |
Delay |
≤14μs |
|
14 |
Frequency error |
≤5×10-8 |
|
15 |
Up link noise floor rejection |
≥17dB |
|
16 |
Spurious Mask |
In band |
≤-60dBc/30kHz或≤-36dBmc/3kHz |
|
Out of band
2.5MHz offset |
9kHz～1GHz：≤-36dBm |
|
1GHz～12.75GHz：≤-30dBm |
|
17 |
IMD |
In Band |
≤-45dBc/30kHz |
≤-45dBc/30kHz |
|
Out of band
2.5MHz offset |
9kHz～1GHz：≤-36dBm/100kHz |
|
1GHz～12.75GHz：≤-30dBm/1MHz |
|
18 |
Out of band rejection |
≤-40dBc@±400kHz |
|
≤-60dBc@±600kHz |
|
≤-65dBc@±1MHz |
|
≤-70dBc@±5MHz |
|
19 |
RF connector |
N/F，50Ω |
|
20 |
Power supply |
AC220V±20%，50±5Hz |
|
21 |
Protection Class |
IP55 |
|
22 |
Outline |
10W/20W：530*400*200mm（L*W*H）
40W/60W：660*400*218mm（L*W*H） |
|
23 |
Monitor |
具备本地监控和远程监控功能
Local monitor：232；
Remote monitor：GSM MODEM; |
|
24 |
MTBF |
≥50000h |
|
|
|
|
|
|
5. Outside Drawing
6. Connector
l BS：The donor antenna，N/F；
l MS：The retransmission antenna，N/F；
l GND: Ground；
l Loc alarm: Location alarm，connect to ground；
l Exit alarm: Outside alarm；
l AC/DC: AC 220V or DC -48V；
DC：Brown——V+；Blue——V-；
AC：Brown——L；Blue——N；Yellow——GND；
