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The EMTS Telecom Services Ltd. Triple Band 1800/2100MHz Digital Mini Repeaters (DMR) provide an excellent solution to poor signal coverage and are used for coverage extension and building applications. The DMR is designed to support signal coverage for 1800/2100MHz bands with up to 1500 sqm. covered area, supporting both LTE and WCDMA technologies. The mini repeater has an intelligent algorithm to minimize uplink interference; simultaneously, the isolation detection function allows users to be alerted when the distance between the donor and service antenna is insufficient. The easy-to-install feature highlights the DMR as an excellent signal enhancement solution, improving the LTE/WCDMA coverage and capacity and 5G network dead areas where service is poor. The EMTS Digital Mini-Repeater also enhances the mobile network's capacity and data coverage in areas with limited signal strengths. It provides an affordable solution for indoor signal coverage problems due to signal fading and attenuation caused by architectural obstacles. Its easy installation and maintenance can help carriers get a fast return on investment. Setting the sub-bands using advanced digital technology is done via EMTS Mobile App or direct connection via USB cable. The EMTS Telecom Services DMR is based on the latest technology using advanced RF and digital modules that reduce power consumption and increase reliability and MTBF. The DMR can be connected to EMTS NMS via an LTE modem for remote monitoring and control & utilizing an advanced ICS or IMOP algorithm for preventing oscillations.
EMTS Telecom Services Ltd. offers a comprehensive portfolio of enhanced coverage solutions for Wireless Networks, in-building coverage. Regardless of the technology or frequency, EMTS can provide customized coverage solutions that address any combination of unique and complex network needs for Wireless Networks.
Key Features
- Triple Band Digital Repeater supporting 900, 1800and 2100MHz bands
- Advanced Digital Filtering Technology with up to 25MHz tuning range per band
- Fully comply with ETSI & 3GPP with 20dBm total composite power and 90dB gain
- Extremely low NF with an excellent EVM reduces the uplink noise to the base station
- IMOP Support (Isolation Measurement and Oscillation Protection), Smart mode to auto-adjust gain according to the isolation and signal level received by the donor site
- ICS mechanism for improving isolation by 25dB
- Supports WCDMA & LTE (optional: 5G) in the same repeater
- Linear power amplification effectively suppresses inter-modulation and spurious emissions, minimizes uplink interference (optional: uplink shutdown)
- Easy installation using a ruggedized enclosure, LED indication, Local control via keyboard, USB, or WIFI
- Optional control and alarm via 4G modem using EMTS NMS
Technical Specifications
| Technical Specifications |
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| Electrical Performance |
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| System (GSM/WCDMA/LTE900) | GSM/LTE1800 / UMTS/LTE/5GNR2100 |
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| Frequency Range | Uplink: 1710~1785MHz / 880-915MHz / 1920~1980MHz / Downlink: 925-960MHz / 2110~2170MHz |
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| No. of Carriers (1/2/4 Carriers, the) | 1/2/4 Carriers, the / 1/2/4 Carriers, the |
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| Bandwidth of the (Bandwidth of the) | Bandwidth of the |
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| Corresponding (Corresponding) | Corresponding Carriers is |
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| Carriers is 20/10/5MHz (Carriers is) | 20/10/5MHz 20/10/5MHz |
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| Maximum (Uplink) | 20±2dBm / 20±2dBm / 20±2dBm |
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| Output |
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| Power (Downlink) | 20±2dBm / 20±2dBm / 20±2dBm |
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| Output power limits (per band) | Single Band: 20dBm; Triple band: 17dBm |
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| Gain | 90 minimum |
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| Gain Adjustment Range | 0~31dB @Step of 1dB |
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| AGC/ALC | ≥20dB |
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| Intelligent Algorithm to Prevent UL | Support |
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| Interference |
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| Interference Cancellation- Optional | ≥ 25dB (Isolation+10dB) |
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| In-Band Ripple (Typical) | ≤±3dB |
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| Maximum Input Power | -10dBm |
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| Spurious Emission | 9kHz~1GHz: ≤ -36dBm 1GHz~12.75GHz: ≤ -30dBm |
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| Frequency Error | ≤ 0.05ppm |
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| EVM(RMS) (≤ 8%) | ≤ 8% Optional ≤ 4.5% (5G) |
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| RF Channel Switch | Supports ON/OFF Settings through Software |
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| VSWR | ≤ 2.1 |
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| Noise Figure | ≤ 7dB |
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| Group Delay | ≤ 5μs |
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| I/O Impedance | 50 Ω |
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| Isolation Detection | Isolation Check During Boot-Time EMTS Telecom Services is a leading supplier of high-quality RF coverage solutions designed to maximize wireless network coverage |
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| of wireless Networks. |
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| Alarm Monitoring System | Alarm for Uplink Self-Oscillation |
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| ICS | Isolation =Gain-25dB |
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| Mechanical Performance |
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| RF Connector | 2XN-Female |
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| Power Consumption | ≤ 80W |
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| Power Supply (AC to DC) | Input AC220V,50/60Hz |
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| Dimensions | 318*265*113mm |
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| Weight | ≤7kg |
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| Mounting | Wall Mounting |
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| Environmental Performance |
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| Operating Temperature | -20 ~ +50 °C |
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| Application | Indoor (IP30) |
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| Relative Humidity Range | ≤95%(non-Condensing) |
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| Control and Indications |
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| LED Indicator | Power Supply, Alarm, Running |
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| Local Control | Via Keyboard, USB Interface, or WIFI |
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| NMS Mode (optional) | Cloud NMS via 4G Wireless Modem |
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| Complied Standards |
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| Conformance Standard | Safety: EN 60950 EMC: ETSI 301 489-50, ETSI 301 489-1, Radio: ETSI 301 908-11, ETSI 301 908-15 |
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| 3GPP standards | TS 25.106, TS 36,106, TS 38.104 |
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| CE | Comply with CE standard |
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| Ordering options |
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| Type | Model No. |
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| Standard | DMR-91821-20W90 |
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| Standard with ICS capability | IDMR-91821-20W90 EMTS Telecom Services Ltd. offers a comprehensive portfolio of enhanced coverage solutions for Wireless Networks, in-building coverage. Regardless of the technology or frequency, EMTS can provide customized coverage solutions that address any combination of unique and complex network needs for Wireless Networks. |
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| Figure 1 - schematic diagram of Repeater structure |
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| Figure 2 - schematic diagram of system application scenario |
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| of wireless Networks. |
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