Mini Repeater 
MODEL:
GRT933 (CDMA 800MHz Band A) / GRT93C (CDMA 800MHz Band B) /
GRT833 (GSM 850MHz) / GRT8B3 (E-GSM) / GRT863 (GSM 900MHz) /
GRT883 (GSM 1800MHz) / GRT893 (GSM 1900MHz) / GRT653 (WCDMA)
Our Mini Repeater (i.e. small RF repeater with output power lower than 1W) provides an affordable solution to solve the indoor coverage problems due to signal fading and attenuation caused by architecture obstacles.
It is mainly deployed for small points of in-building wireless signal coverage, when installation of standard repeaters will generate great interference to the wireless network or the area to be covered is widely distributed. Its easy installation and maintenance can help carrier get fast return.
The Mini Repeater works as a relay between the BTS and mobiles. It picks up the strongest signal from the BTS via the Donor Antenna, linearly amplifies the signal and then retransmits it via the Coverage Antenna to the weak/blind coverage area. And the mobile signal is also amplified and retransmitted to the BTS via the opposite direction.
See the overview of Repeater here.
Application Diagram of Mini Repeater
Features
Application
Accessories
Specifications
Features
- Super-compact size with light weight to facilitate wall-mount installation;
- Low power consumption and no interference to BTS;
- Smart Automatic Level Control (ALC) ensures output level stable and adjustable continuously;
- Unique color LEDs to indicate power supply and signal level of uplink and downlink;
- Linear power amplification to effectively suppress intermodulation and spurious emission;
- "Plug & Play" - basically no needs for configuration and free of maintenance.
Application
To expand signal coverage or fill signal blind area where signal is weak or unavailable.
- Small blind area or weak-signal area, e.g. underground or semi-underground rooms, small basements, underground parking lots;
- Small zones with hot traffic: meeting rooms, supermarkets, offices, pubs, coffee shops, gyms, etc.;
- Elevators (especially when cabling in the elevator shaft is difficult);
- Private homes or villas at outskirts with bad signal coverage.
Accessories Included
Mounting Brackets
Use the brackets to mount the mini repeater onto a wall.
AC/DC Adaptor
Use the AC/DC adaptor to give power supply to the mini repeater.
User Manual
The user manual gives you a complete guide for the installation, operation and troubleshooting of the mini repeater.
Optional Accessories
Jumper Cable
Use the jumper cables to connect the mini repeater to the Donor Antenna and the Coverage Antenna.
Donor Antenna (Yagi antenna)
The Donor Antenna is used to pick up wireless signal from the BTS. It connects to mini repeater via a jumper cable. Usually it is installed outdoors (e.g. on the roof) to get better signal.
Coverage Antenna (Ceiling-Mount Omni antenna)
The Coverage Antenna helps to transmit the amplified signal to the area to be covered. A jumper cable is also required to connect it to the mini repeater.
Cable Tie
Use the cable ties to fix the jumper cables.
Waterproof Tape
Wrap the waterproof tape over the joint of RF connectors to give protection against rain and humidity.
Electrical Tape
Wrap the electrical tape over the joint of RF connectors to give protection against rain and humidity.
Specifications
| Mini Repeater | |||
|---|---|---|---|
| Working Frequency | Uplink | GSM850: 824~849MHz / E-GSM: 880~915MHz / GSM1900: 1895~1910MHz / CDMA800B: 835~845MHz / |
GSM900: 890~915MHz / GSM1800: 1710~1785MHz / CDMA800A: 825~835MHz / WCDMA: 1920~1980MHz |
| Downlink | GSM850: 869~894MHz / E-GSM: 925~960MHz / GSM1900: 1975~1990MHz / CDMA800B: 880~890MHz / |
GSM900: 935~960MHz / GSM1800: 1805~1880MHz / CDMA800A: 870~880MHz / WCDMA: 2110~2170MHz |
|
| Gain | Uplink: ≥ 70dB; Downlink: ≥ 75dB | ||
| Gain Adjustment Range | ≥ 30dB | ||
| Output Power | 0.2W (23dBm) / 0.5W (27dBm) / 1W (30dBm) | ||
| In-Band Ripple | ≤ 4dB p-p | ||
| Spurious Emission | Within working band | ≤ -15dBm/30kHz | |
| Out of working band (Δf > 2.5MHz) |
9kHz~1GHz: ≤ -36dBm/30kHz 1GHz~12.75GHz: ≤-30dBm/30kHz |
||
| I/O Impedance | 50Ω | ||
| Voltage Standing Wave Ratio (VSWR) | ≤ 1.5 | ||
| Noise Figure | ≤ 8dB | ||
| Intermodulation Attenuation | ≤ -40dBc | ||
| System Delay | ≤ 1.5μSec | ||
| RF Connector | N-Type (Female) | ||
| Operating Temperature | -10°C ~ +50°C | ||
| Power Supply | AC 110~220V±10%, 45~55Hz | ||
| Dimensions | 322mm X 233mm X 60mm | ||
| Weight | 9kg | ||
| Electromagnetism Compatibility | Compliance with ETS300 694-4 Standard | ||
| Indication LED | Power supply, Rx signal level, Tx signal level | ||
| Remote Monitoring/Control via NMS | Not Supported | ||
| ALC (automatic level control) | Supported | ||