| Type: | Signal Repeater |
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| Transmission Medium: | Wireless |
| Standard: | Standard |
| Customization: |
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| Shipping Cost:
Estimated freight per unit. |
about shipping cost and estimated delivery time. |
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| Payment Method: |
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| Initial Payment Full Payment |
| Currency: | US$ |
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| Return&refunds: | You can apply for a refund up to 30 days after receipt of the products. |
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Suppliers with verified business licenses
Audited Supplier Good Helper 20dBm Wide Band Preamplifier for GSM 900 Signal Booster
A pre-amplifier is utilized when the input power of the repeater is weaker than the suitable power level, pre-amplifier will boost the input signals to a certain reasonable level so that the repeater can reach its full output power for a much larger coverage size.
The pre-amplifier has also been largely deployed to assist the Pico repeater operation in rural areas. As it is known, the Pico repeater only gets 5~15dBm output power in UL, so when the repeater site is too far away from the BTS tower, the mobile phone signals would not be strong enough to go back. Typical phenomena are that people can see full bar signals on the mobile phone, but the phone calls can't be initiated. So a pre-amplifier with 20dBm output power in UL would increase the UL power level of the repeater so that the signals can reach the BTS tower.
Pre-amplifiers are available in the single, dual and triple mobile band, i.e., not only we have pre-amplifiers able to amplify one GSM900 band, but also a triple band one to support GSM900, DCS, and WCDMA at the same time.
It supports all current technologies of GSM850, GSM900, DCS, PCS; CDMA450, CDMA800, CDMA1900, CDMA2000, WCDMA2100 and AWS.
Though it supports up to the triple-band, the pre-amplifiers are still compact size, elegantly looking with low power consumption.
Specification:
| Frequency Range | Uplink | Downlink | |||
| GSM900 | 890-915MHz | 935-960MHz | |||
| Max. Gain | 30dB | 30dB | |||
| Max. Output Power | 20dBm | 20dBm | |||
| Bandwidth | Wide Band | ||||
| Manual Gain Control | 31dB / 1dB Step | ||||
| Automatic Gain Control | >30dB | ||||
| Ripple in Band | CDMA,GSM≤6dB; DCS,PCS≤8dB; | ||||
| Noise Figure | ≤ 6dB | ||||
| VSWR | ≤ 2.0 | ||||
| Intermodulation Products | 9KHz~1GHz | ≤ -36dBm | |||
| 1~12.75GHz | ≤ -30dBm | ||||
| Spurious Emission | 9KHz~1GHz | ≤ -36dBm | |||
| 1~12.75GHz | ≤ -30dBm | ||||
| Time Delay | ≤ 1.5 μs | ||||
| Frequency stability | ≤ 0.01ppm | ||||
| MTBF | > 50000 hours | ||||
| Impedance | 50 ohm | ||||
| Power Supply | AC 90-264V,DC 9V/3A | ||||
| Power LED | Power indicator | ||||
| ISO(Alarm LED) | Red | Self-oscillation or Strong input signal | |||
| Green | Normal | ||||
| Mechanical Specification | |||||
| RF Connector | N-Female | ||||
| Switch | Power Switch | ||||
| Cooling | Heatsink Convection cooling | ||||
| Humidity | < 90% | ||||
| Operating Temperature | -20°C ~ +55°C | ||||
| Environment Conditions | IP40 | ||||
| Installation Type | Wall Installation | ||||
| Size | 170mm×126mm×21mm | ||||
| Weight | < 1.5Kg | ||||
Features:
1. Wideband pre-amplifier to support all signals
2. ETSI & 3GPP 3GPP2 standards
3. Enough UPLINK power level of 20dBm to reach BTS
4. UL AGC 10dB range to ensure high linearity
5. UL IM3 meets with ETSI 3GPP 3GPP2 standards
6. Alarm LED's for error detection
7. Universal power range of 90V~265V
8. Elegant design lightweight low power consumption
Support these systems:
| Frequency Range | Uplink | Downlink |
| CDMA 450 | 452.5 - 457.5MHz | 462.5 - 467.5MHz |
| LTE700 A/B | 703-748MHz | 758-803MHz |
| LTE700 C | 777- 787MHz | 746- 756MHz |
| LTE700 D | 788- 798MHz | 758- 768MHz |
| LTE 800 | 832- 862MHz | 791- 821MHz |
| iDEN | 806- 824MHz | 851- 869MHz |
| CDMA 800/GSM 850 | 824- 849MHz | 869- 894MHz |
| GSM 900 | 890- 915MHz | 935- 960MHz |
| EGSM | 880 - 915MHz | 925 - 960MHz |
| AWS1700 | 1710- 1755MHz | 2110- 2155MHz |
| DCS 1800 | 1710- 1785MHz | 1805- 1880MHz |
| PCS 1900 | 1850- 1910MHz | 1930- 1990MHz |
| WCDMA/3G 2100 | 1920- 1980MHz | 2110- 2170MHz |
| LTE 2600 | 2500- 2570MHz | 2620- 2690MHz |
Advantages:
1. can customize the Cover Image on the Cell Phone Signal Booster, design private styles
2. If there are strong input signals or severe self-oscillation, ISO LED is red.
3. If there is a good input signal, AGC LED is green.
Standard Package:
1) AC90-264V, DC9V/3A power supply adapter 1PCS
2) AC power cord (EU/US/UK/SA/China standard, etc) 1PCS
3) Installation kit 1PCS
4) User manual 1PCS
Q1. Could I get a sample before bulk order?
Yes, we offer the sample for all models but charged.
Q2. What should I do if I don't know about frequency in my country?
Please feel free to contact us with your inquiry, we will find the frequency you need and address your problems.
Q3. Do you accept OEM/ODM order?
Yes, we can customize the brand logo, colors, and frequencies.
Q4.Shipment Date
| Sample | 3-5 business days |
| <20 pcs | 7-15 days |
| 20-50 pcs | 15-24 days |
| >50 pcs | Negotiate |
| USA/Canada/Europe/Asia | 3-5 days |
| Middle East/Latin American | 5-7 days |
| African | 3-7 days |
Q6.Payment Method
T/T, Western Union, Paypal, and Credit Card are available,
but we suggest paying by Alibaba Trade Assurance, the most favor, and security method.
*Other methods please contact us with more details.
Q7.Others
(1)Frequency
We can customize Single/Double/Triple/Quand/Penta Band for cellphone signal like 2G/3G/4G(GSM/CDMA/DCS/PCS/WCDMA/LTE, etc,)
(2)Output Power &Coverage Areas
| Output Power | Coverage Areas |
| 20dBm | 500-1500m² |
| 23dBm | 800-1500m² |
| 25dBm | 2500-4000m² |
| 27dBm | 3000-5000m² |
| 30dBm | 5000-8000m² |
*Coverage is related to local signal strength, please contact us with your local condition, we can offer the best solution.
(3)Antenna
Cellphone signal booster must attach one indoor antenna and one outdoor antenna by two coaxial cables.
Website's price only includes a signal booster, please contact us if you need one set of devices with antenna, splitter, and coupler.
Suppliers with verified business licenses
Audited Supplier 
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