Double Unit for Easy Use with Dual Band Sites

Main Features:

Double unit for easy use with dual band sites
High linearity and low noise performance
Linear Amplifier with very low intermodulation products
Support AISG 1.1 and AISG 2.0
By-pass mode to ensure cell operation in case of DC power down
Built-in lightning protection

The EMTS Telecom Servcies Ltd. Dual Tower Mounted Amplifier (DTMA) is dual band 1800 / 2100MHz low-noise amplifier installed near the antenna. It helps toimprove the signal-to-noise ratio and enhance the receiving sensitivity of the BTS system. It enhances the uplink coverage and improves uplink and downlink imbalance of the base station. It effectively reduces the transmitting power of cell phones, improves voice and data communication quality.

Technical Specifications:

Feature / Specification
RX
Frequency Range / 60MHz (1920 MHz to1980 MHz)
75 MHz (1710 MHz to 1785 MHz)
Gain / 12dB±1
Gain Fluctuation / ±0.4dB typ.,±0.6dB max
Noise Figure / 1.6dB typ.,1.8dB max
Group Delay / 45 ns max over any 5MHz in Rx band
Returnloss in by-pass mode / 16dB min
Return loss in normal mode / 18dB min
Max Input Power / <12dBm
Insertion loss in bypass mode / 2.5dB typ., 2.8dB max
Impedance / 50Ω
Output 1-dB compression point / 20dBm min
TX
Frequency Range / 60 MHz (2110 MHz to 2170 MHz)
75 MHz (1805 MHz to 1880 MHz)
Insert loss / 0.40dB typ.,0.60dB max
Return loss / 20dB min
Group Delay / 45 ns max over any 5MHz in Rx band
Average Power / 200W
Max Power / 2.5KW
Intermodulation products in RX band / -116 dBm (2 Tx carriers at +43 dBm) (Power up)
Environmental Characteristics
Operating temperature range / –40~ +65 °C
IP rating / IP67
MTBF / > 1 000 000 hours (per TMA)
EMC / According to ETS 300 342-3
DC and Alarm Characteristics / AISG Mode
DC supply / 10– 30 V
Operating current per TMA
(without RET) / Nom. 280mA at 10 V
Nom. 110 mA at 30V
Alarm management / AISG
Mechanical Characteristics
Material / Aluminium housing
Connectors RF
AISG / DIN 7-16（F）* 4 long neck
8-pin female, IEC 60130-9
(Pin 3: RS485B, pin 5: RS485A,
pin1pin 6:10 – 30V DC, pin 7: DC return, other pins: not connected)
Mounting / Wall mounting: with 4 screws (max. 8 mm diameter)
Mast mounting: with additional clamp set
Weight / 5.5kg
Dimensions (w x h x d) / 290x225x76mm(without connectors, without mounting brackets)

AISG Setting:

The protocol of the software interface can be switched between AISG 2.0 / 3GPP and AISG 1.1. If the primary station does not support the default setting, it has to be switched over before system start-up. Please contact Haina Telecom for further information.

Structure diagram:

Accessiories:

Set of clamps (64-114mm)

Note: All specifications subject to change without notice.

About EMTS Telecom Services Ltd.:

EMTS Telecom Services is a leading supplier of high-quality RF coverage solutions designed to maximize wireless network coverage in difficult RF environments and complex settings. Thecompany specializes in extending RF radio coverage to rural areas, office buildings, subways, tunnels and shadowed areas. The EMTS coverage solution supports all major mobile technologies and standards of wireless Networks.