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  
      850 MHz Full-Band TMA with SMR Rejection   TMA850SVG24A
  TMA850SVG24A FV  
  • Adjustable Gain - 16 to 24 dB
  • SMR Channel Filtering
  • Single unit
  • AISG 2.0 compliant
  • Dual duplexed
  • High Linearity
  • Lightning protected
  • High reliability
  • Full 25 MHz AMPS band




Communication Components, Inc. Single Tower-Top Masthead Amplifier (TMA) provides a TMA with SMR channel filtering and AISG control in a single housing.  The TMA is full 850MHz 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, backward compatible with DC PDU’s and supports CDMA, EDGE/GSM and UMTS BTS equipment.  It provides a convenient package to improve site Noise figure.  The single TMA package reduces tower loading, leasing, and installation costs.  Unit count on the tower is cut in half .  SMR filtering is built into the unit to protect against adjacent SMR signals.


Technical Description:

The TMA system consists of an outdoor tower mount unit with integrated AISG sampling from the feeder line.  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 three band-pass filters, two redundant low-noise amplifiers, bypass failure circuitry, and bias tee 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 824 - 849 19 dB min. (16 dB bypass mode)
869 - 894 19 dB min.
BTS 824 - 849 19 dB min. (16 dB bypass mode)
869 - 894 19 dB min.
Gain ANT - BTS 824 - 849 16 to 24 dB adjustable in 0.25 dB steps via AISG (± 1.0 dB)
Insertion Loss ANT - BTS (RX Bypass mode) 824 - 849 1.4 dB typ. @ 25°C, 1.6 dB typ. @ 65°C  (± 1.6 dB)
ANT - BTS (TX) 869 - 894 0.4 dB typ. (±0.15 dB)
Rejection ANT - BTS 851 - 854 > 30 dB
Noise Figure  ANT - BTS  824 - 849 1.4 dB typ. @ 25°C, 1.7 typ. dB @ 65°C; 3.2 max. @ 65°C @ 849 MHz (band edge)
Input Third Order Intercept Point ANT - BTS 824 - 849 0 dBm min. at max. gain
General Characteristics  
Impedance 50 ohms
Continuous Average Power 200 W max.
Peak Envelope Power 2 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 < 3.6 W


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


Connectors   2 × 7-16 DIN female 1 × AISG
Dimensions (w/o connectors or brackets)(H×W×D) 10.6 × 7.9 × 3.3 in. (270 × 200 × 83.2 mm)
Dimensions (with brackets)(H×W×D) 14.25 × 8.4 × 3.6 in. (362 × 213.8 × 92.4 mm)
Weight 13.4 lbs (6.1 kg)-without bracket; 14.2 lbs (6.5 kg)-with bracket
Mounting Pole/Wall mounting bracket


   TMA850SVG24A Outline
  TMA850SVG24A Outline Drawing


Block Diagram

   TMA850SVG24A BD
  TMA850SVG24A 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

TMA850SVG24A 850 PCS Full band TMA with SMR Rejection


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