Tower Mounted Amplifier (TMA), also known as Mast Head Amplifier (MHA), is a cost-effective solution for operators to enhance uplink sensitivity and thus improving the overall network performance of the BTS. It is generally installed at the top of the tower, as near as to the receiving antenna, trying best to reduce noise figure and weak signal area.
Feature:
Schematic Diagram:
| Items | Uplink | Downlink | |
|---|---|---|---|
| Working Frequency (customize) | Band1 | 824~849 MHz | 869~894 MHz |
| Band2 | 890~915 MHz | 935~960 MHz | |
| Band3 | 1710~1785 MHz | 1805~1880 MHz | |
| Band4 | 1850~1910 MHz | 1930~1990 MHz | |
| Gain | 12±1dB | -- | |
| Flatness | ≤ ±0.5dB | -- | |
| Noise Figure | ≤ 1.8dB | -- | |
| Group Delay | 45 ns max over and 5MHz in Rx Band | ||
| Return Loss in by pass Mode | > 15dB | > 18dB< | |
| Return Loss in Normal Mode | > 17dB | > 18dB< | |
| Max Input Power | < 12dB | -- | |
| Insert Loss in by-pass Mode | < 2.8dB Max | 0.50dB typ., 0.70dB max | |
| Inter-modulation Products in Rx Band | < 112dBm (2 Tx carriers at + 43dBm) (power up) | ||
| Output 1 dB Compression | > 20dBm | -- | |
| I/O Impedance | 50Ω | ||
| Power Supply | DC 10-30V | ||
| Operating Current per TMA(Without RET) | Nom. 280mA at 10V / Nom. 110mA at 30V | ||
| Power Handing | 2.5KWPEAK; 200W AVG | ||
| Alarm Management(Optional) | AISG | ||
| Material | Aluminum Housing | ||
| RF Connector | 7/16 DIN female | ||
| AISG Connector(Optional) | 8-pin female, IEC 60130-9(Pin 3:RS485B, Pin 5:RS485A, Pin1 & Pin6: 9-30V DC, Pin7: DC return, other pins: not connected) | ||
| Working Temperature Range | -40 ~ +65℃ | ||
| EMC | According to ETS 300 342-3 | ||
| MTBF | > 1000000 hours(per TMA) | ||
Action Technologies is a professional manufacturer and solution provider of RF system. Our products, including MDAS, RF BDA/repeater, IBS and PMR as well as NMS software system, cover in more than 100 cities and 30 countries in the world. We are dedicated to provide best quality infrastructure and total solution to mobile operators and enterprises to enhance the trunked radio/cellular network.
Contact Action:
Phone: +86-755-86238970
Mail: info@action-tek.net
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