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+1 (201) 342-3338 phone  
+1 (201)-342-3339 fax  
89 Leuning Street  
South Hackensack, NJ 07606  
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+1 (201) 342-3338 phone  
+1 (201)-342-3339 fax  
89 Leuning Street  
South Hackensack, NJ 07606  

      900 MHz Antenna Sharing Combiner ASC900VG11A
  ASC900VG11A FV  
  • Small, lightweight, outdoor unit
  • Dual Technology Combiner (GSM 900 / UMTS 900)
  • Can also be used for same technology (e.g. GSM/GSM)
  • Can be used close to Antenna
  • Can be used in Ground Based Applications while maintaining Diversity Path
  • Can operate as a Passive Combiner in non-DC fed system
  • Rx path is “Independent” of Tx path
  • Can survive incorrect installation as ports are protected
  • AISG 2.0 compatible unit
  • ASC receives DC Voltage and AISG sampling at the UMTS BTS-1 port
  • ASC operates at constant power
  • High Linearity
  • Lightning protected
  • Fail-safe bypass mode
  • High reliability



CCI’s Dual Technology Antenna Sharing Combiner (ASC) allows two Base Stations to share the same antennas and preserves Receive Diversity without any combining losses. In the Downlink direction, the transmit signal from each Base Station is directed to one of the two antenna ports. In the uplink direction, an Amplifier compensates for combining losses normally associated with passive combiners. The Gain of the amplifier can be controlled remotely using AISG 2.0 Protocol, and the gain level to each BTS can be independently controlled.

Technical Description:

The ASC 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 signals using an ultra-low noise amplifier (LNA), and recombines the two paths at the BTS port. In addition, the uplink signal is split out after the LNA and routed to the BTS diversity port. The tower mount units consist of six band-pass filters, four redundant low-noise amplifiers, two splitters, 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. AISG 2.0 DC power and control is provided via the feeder cable from the BTS using the AISG 2.0 and 3GPP standard. The ASC is powered through the UMTS (BTS-1) port. Additionally the ASC operates at constant power when powered by an AISG 2.0 Compatible Site Control Unit, or BTS. A separate AISG connector is also provided to allow direct AISG connection or “Daisy Chaining” to multiple AISG products at the top of the tower. With fully protected input ports, the unit can be installed without the concern of damaging the unit should it be incorrectly installed.


  • Functions as a combiner for same band Base Station Equipment, (Can be same technology (e.g. GSM and GSM) or different technology (e.g. GSM and UMTS)) enabling Rx Diversity and overcoming losses normally associated with passive combiners.
  • Can be used close to the antenna, enabling Remote Radio Head equipment to be combined with Coaxial fed systems which use a pair of Coaxial Feeder Lines. Gives additional gain for overcoming feeder and combining losses.
  • Can be used in ground based applications, as a combiner. Overcomes losses and maintains Rx Diversity path.
  • PDU has flexibility to be used in non-DC fed systems, thus giving passive combining of two same band systems into coaxial feeder line pair.

Electrical Specification

RF Parameters Ports Frequency(MHz) Specification
Return Loss ANT 890 - 915 18 dB min. (16 dB bypass mode)
935 - 960 18 dB min.
BTS 890 - 915 18 dB min. (16 dB bypass mode)
935 - 960 18 dB min.
Gain ANT - BTS 890 - 915 4 to 11 dB adjustable in 0.25 dB steps via AISG (± 0.2 dB in any 3.84 MHz segment)
Insertion Loss ANT - BTS (RX Bypass mode) 890 - 915 7.0 dB max.
ANT - BTS (TX) 935 - 960 0.3 dB typ., 0.5 dB max.
Group Delay ANT - BTS (TX) 935 - 960 ±4 ns in any 3.84 MHz segment
Noise Figure ANT - BTS 890 - 915 1.75 dB typ. @ 25°C @ max gain
Input Third Order Intercept Point ANT - BTS 890 - 915 +9 dB 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 ≤ 4.0 W

Environmental Specification

Operating Temperature -40˚ C to +60˚C
Enclosure IP65 (Unit Body), IP68 (Connector
MTBF >500,000 hours
Lightning Protection 8/20us, ±2KA max, 10 strikes each, IEC61000-4-5

Mechanical Specification

Connectors DIN 7-16 female x 6 (BTS (x 2), ANT (x 2), RxD (x 2)), AISG x 1
Dimensions (w/o connectors or brackets)(H×W×D) 10.63 x 7.87 x 4.02 in. (270 x 200 x 102 mm)
Dimensions (with brackets)(H×W×D) 14.25 x 8.31 4.31 in. (363 x 211 x 109.5 mm)
Weight (w/o Bracket) 15.4 lbs (7.0 kg) approx.
Weight (with Bracket) 16.5 lbs (7.5 kg) approx
Mounting Pole/Wall Mounting Bracket


  ASC900VG11A Outline
  ASC900VG11A Outline Drawing


Block Diagram

  ASC900VG11A BD
  ASC900VG11A 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

ASC900VG11A 900 MHz Dual Technology Outdoor Antenna Sharing Combiner


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