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The EMTS Telecom Services DMR channel selective Power Repeater / Bi-Directional Amplifier (BDA)
provides an excellent solution for in-building applications for poor signal coverage or outdoor coverage
extension. Typical applications are Airports, Tourism regions, tunnels, factories, mining districts, villages,
Hotels, exhibition centers, basements, shopping malls, offices, parking lots, and others. With the BDA, the
DMR/TETRA/ P25 operator can quickly expand a base station's service area by filling in coverage holes
caused by terrain, buildings, or tunnels. Easy installation, lightweight design, and very friendly GUI make the
EMTS repeater easy to use and install. Its Band-selective functionality enables amplifying only the selected
Key Features
- Bi-directional Amplifier (Repeater) fully compliance with DMR and CE standards
- IP65 enclosure for indoor or outdoor installations
- Comply with TETRA /Apco-25 and DMR/LMR standards and system requirements
- Utilizes advanced filtering technology to support out-of-band system requirements
- Provide quick RF coverage extension to LMR/DMR/TETRA/P25 Base-Station
- Band-selective configuration according to the standard or customized bands
- Optional channel selective type with up to 8 DSP filters of 25KHz each
- Metal cavity filter technology allows wider receiving/transmitting separation, higher stability, and lower noise figure
- Intelligent design provides auto amplitude compensation with a built-in ALC function
- USB port for local supervision, with built-in 3G/4G modem for remote management and configuration and mobile app
Technical Specifications
| Technical Specifications |
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| Electrical Specifications (Uplink) | Downlink |
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| Frequency Ranges (MHz) (806-816 MHz) | 851-861 MHz |
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| Bandwidth | Band Selective type according to the above list of standard frequencies or customized band per customer definition (Optional channel selective with up to 8 channels) |
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| Gain | 83dB(±3dB) |
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| Gain Adjustment Range | 30 dB in 1 dB step |
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| Pass Band Ripple | ≤3dB |
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| Composite Output Power (25dBm (±1 dB)) | 33 dBm (±1 dB) |
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| AGC Range | 30 dB |
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| VSWR | 1.5:1 |
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| Noise Figure@ Max Gain | ≤4.5 dB |
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| Spurious emissions | ≤-36dBm (9KHz to 1GHz); ≤-30dBm (1GHz to 12.5GHz) |
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| Third-order Inter-Modulation | ≤ -45dBc / 30kHz (measured under rated output power) |
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| Group Delay band selective mode | 5 μs |
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| External connection |
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| Connector | N-F / 50 ohms |
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| Alarm Detection | HPA, LNA, TEMP, PSU, Digital IF module, Local LED display, external Dry Contacts |
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| Local Alarm and Setting | Through RJ45 |
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| Remote management and alarms | Via 4G modem or dial-up modem (optional) |
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| Power Supply | Standard - 220V AC Power supply Optional –48 or 24V DC or Dual - 220V AC & -48V DC With an automatic switchover |
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| Power Consumption | <150 watts |
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| Environmental |
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| Operating Temperature Range | -30 to +55 °C |
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| Cooling | IP67 |
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| Environmental Sealing | Up to 95% (non-condensing) comply with ETSI EN 300 019-2-4 |
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| Operating Humidity | 447*357*171mm |
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| Size (W x H x D) | 18Kg |
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| Comply with Standards |
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| Safety | EN60950-1, EN 50385 |
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| EMC | EN 301 489-1, EN 301 489 |
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| Radio | EN 302 561 |
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| DMR | ETSI TS 101 789-1 and EN 303 035-1 and EN 300 394-1 |
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| CE | Comply |
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| Networks. |
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