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The EMTS Telecom Services LMR/DMR Band selective Power Repeaters (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. Using the Repeater, the LMR/DMR or
TETRAPOL operator can quickly expand a base station's service area by filling in coverage holes caused by
terrain, buildings, or tunnels. The Repeater amplifies the LMR/DMR handset signals and base stations and
can be used in dead areas where service is poor. Using a coaxial cable, the Repeater is connected to an
outdoor 'donor' antenna. The donor antenna transmits signals from mobile phones and receives signals from
the BTS. Easy installation, lightweight design, and very friendly GUI make the EMTS repeater the perfect
solution for radio coverage, while being easy to use and install.
Key Features
- 19-inch enclosure for rack mounting installation (optional IP65 outdoor enclosure)
- Bi-Directional Amplifier configuration for off-air compliance with LMR/DMR standards
- Support Band or Channel Selective for LMR/DMR networks
- Provide quick RF coverage extension to LMR/DMR station using fiber or coax DAS
- Metal cavity filter technology allows wider receiving/transmitting separation, higher stability, and lower noise figure
- Intelligent design, with a built-in ALC function, provides auto amplitude compensation
- USB port for local supervision, with built-in 3G/4G modem to communicate for remote management and configuration,
- WIFI connectivity for local settings via mobile app
Technical Specifications
| Technical Specifications |
| Electrical Specifications (Uplink) |
Downlink |
| Frequency (MHz) (350-512) |
350-512 |
| Bandwidth |
Any bandwidth of 1MHz and up with at least 3MHz separation between uplink and downlink Optional channel selective with up to 8 channels of 25KHz |
| Gain |
90dB(±5dB) |
| Gain Adjustment Range |
30 dB in 1 dB step |
| Pass Band Ripple |
≤3dB |
| Composite Output Power (27dBm (±1 dB)) |
40 dBm (±1 dB) |
| AGC Range |
30 dB |
| VSWR |
1.5:1 |
| Noise Figure@ Max Gain |
≤4.5 dB |
| Spurious emissions |
≤-36dBm (9KHz to 1GHz); ≤-30dBm (1GHz to 12.5GHz) |
| Third-order Inter-Modulation |
≤ -45dBc / 30kHz (measured under rated output power) |
| Intermodulation products |
according to ETSI TS 101-789-1 |
| Group Delay Channel selective mode |
12 μs typical |
| Group Delay band selective mode |
5 μs areas, office buildings, subways, tunnels, and shadowed areas. The EMTS coverage solution supports all major mobile |
| technologies and standards of wireless Networks. |
| External connection |
| Connector |
N-F / 50 ohms |
| Alarm Detection |
HPA, LNA, TEMP, PSU, Digital IF module, Local LED display, external Dry Contacts |
| Local Alarm and Setting |
Through RJ45 |
| Summary Alarm output |
Via Dry contact |
| External alarm inputs |
4 alarm inputs |
| Remote management and alarms |
Via 3G/4G modem or dial-up modem (optional) |
| Power Supply |
Standard 220V AC Power supply External Backup battery 24v input |
| Power Consumption |
<150 watts |
| Environmental |
| Operating Temperature Range |
-30 to +55 °C |
| Cooling |
Convection |
| Environmental Sealing |
IP31 (optional IP65 outdoor configurations) |
| Operating Humidity |
Up to 95% (non-condensing) comply with ETSI EN 300 019-2-4 |
| Size (W x H x D) |
485 x 350 x 90mm (19" 2U Chassis) |
| Comply with Standards |
| Safety |
EN60950-1, EN 50385 |
| EMC |
EN 301 489-1, EN 301 489 |
| Radio |
EN 302 561 |
| LMR/DMR |
ETSI TS 101 789-1 and EN 303 035-1 and EN 300 394-1 |
| CE |
Comply |
