Tower Mounted Amplifiers

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+1 (201) 342-3338 phone  
+1 (201)-342-3339 fax  
89 Leuning Street  
South Hackensack, NJ 07606  
Customer Service  
+1 (201) 342-3338 phone  
+1 (201)-342-3339 fax  
89 Leuning Street  
South Hackensack, NJ 07606  
Technical Support  
+1 (201) 342-3338 phone  
+1 (201)-342-3339 fax  
89 Leuning Street  
South Hackensack, NJ 07606  
      AWS Twin Tower Mounted Amplifier DTMA1721VG14A
  DTMA1721VG14A FV  
  • Small, lightweight, twin unit
  • AISG 2.0 compliant
  • Dual duplexed
  • High Linearity
  • Lightning protected
  • High reliability
  • Full AWS band



CCI’s Twin TMA contains two TMA’s in a single housing. Each TMA is full band and fully duplexed. High linearity improves the uplink sensitivity and the receive performance of base stations. The TMA is fully compliant with the latest AISG 2.0 specification and supports CDMA, EDGE/GSM and UMTS BTS equipment. It provides a convenient package for sites upgraded to dual or quad antenna configurations. The twin TMA package reduces tower loading, leasing, and installation costs. Unit count on the tower is cut in half. An excellent match for two branch receive diversity applications using dual polarization antennas . The input and output connectors are located inline for ease of installation in space constrained areas such as uni-pole structures and stealth antennas.


Technical Description:

The TMA system consists of a twin outdoor tower mount unit with two antenna inputs. The tower mount unit is dual duplexed to separate the low-power uplink signal from the high-power downlink signal at the antenna port, amplifies the low-level uplink signal using an ultra-low noise amplifier (LNA), and recombines the two paths at the BTS port. The tower mount units consist of six band-pass filters, four redundant low-noise amplifiers, bypass failure circuitry, and bias tee’s which are all housed in an IP65 moisture proof enclosure, with IP68 Immersion proof connectors suited to long-life masthead mounting. The unit provides protection against lightning strikes via a multi-stage surge protection circuit. DC power and control is provided via the feeder cable from the BTS using the AISG 2.0 and 3GPP standard. A separate AISG connector is also provided to allow direct AISG connection or “Daisy Chaining” multiple AISG products at the top of the tower.
An optional indoor site control unit (SCU) is available to power up to 32 AISG modules per sector and to provide all the monitoring and alarm functions for the system. The SCU is housed in a single (1U) 1.75” x 19” rack and contains dual redundant power supplies capable of being “hot swapped” that provide a regulated DC supply voltage on the RF coax for the tower mount amplifiers.


RF Parameters Ports Frequency(MHz) Specification
Return Loss ANT 1710 - 1755 18 dB min. (15 dB bypass mode)
2110 - 2155 18 dB min.
BTS 1710 - 1755 18 dB min. (15 dB bypass mode)
2110 - 2155 18 dB min.
Gain ANT - BTS 1710 - 1755 8 to 14 dB adjustable in 0.25 dB steps via AISG (± 0.2 dB)
Insertion Loss ANT - BTS (RX Bypass mode) 1710 - 1755 1.1 dB typ. @ 25°C, 1.3 dB @ 65°C  (± 0.05 dB)
ANT - BTS (TX) 2110 - 2155 0.25 dB typ. ±0.05dB passband ripple
Noise Figure  ANT - BTS  1710 - 1755 1.3 dB typ. @ 25°C, 1.5 dB @ 65°C
Input Third Order Intercept Point ANT - BTS 1710 - 1755 +12 dBm min. at max. gain
General Characteristics  
Impedance 50 ohms
Continuous Average Power 500 W max.
Peak Envelope Power 5 kW max.
Intermodulation Performance(all ports) <-110 dBm (-153 dBc) typical (2 × +43 dBm tones) all bands
Operating Voltage +10V to +30V DC provided via coax or AISG
Power Consumption < 2.0 W


Operating Temperature -40˚C to +65˚C
Enclosure IP65 (Unit Body), IP68 (Connector)
MTBF >500,000 hours
Lightning Protection 8/20us, ±2KA max, 10 strikes each per IEC61000-4-5


Connectors 4 × 7-16 DIN female, 1 × AISG
Dimensions (w/o connectors or brackets)(H×W×D) 8.1 × 5.85 × 2.6 in. (206 × 149 × 66 mm)
Dimensions (with brackets)(H×W×D) 11.6 × 7.1 × 3.1 in. (295 × 180 × 79 mm)
Weight 8.0 lbs (3.6 kg)-without bracket; 9.0 lbs (4.1 kg)-with bracket
Mounting Pole/Wall mounting bracket


   DTMA1721VG14A Outline
  DTMA1721VG14A Outline Drawing


Block Diagram

   DTMA1721VG14A BD
  DTMA1721VG14A Block Diagram


SCU-AISG2-3 AISG 2.0 Site Controller
BT-0821-DMDF-AG-O DIN-Male RF Port, DIN-Female RF+DC+AISG Port
BT-0821-DFDM-AG-O DIN-Female RF Port, DIN-Male RF+DC+AISG Port
BT-0821-DFDF-AG-O DIN-Female RF Port, DIN-Female RF+DC+AISG Port

Parts & Accessories

DTMA1721VG14A AWS Full band AISG Twin TMA


Antenna Interface Standards Group (AISG), Federal Communication Commission (FCC) Part 15 Class B, CE, CSA US


89 Leuning Street

South Hackensack, NJ 07606

+1 (201) 342-3338

+1 (201) 342-3339 fax