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South Hackensack, NJ 07606  
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89 Leuning Street  
South Hackensack, NJ 07606  
      Site Control Unit SCU-AISG2-3
      SCU AISG2 3Frontview


CCI’s AISG 2.0 Site Control Unit (SCU) is part of our suite of antenna products. This controller will enable operation of any AISG 2.0 device such as TMA’s or Remote Electrical Tilt (RET) controlled antennas. The antennas RET function enables optimization (tilts) of the sector coverage pattern. The SCU can interface with the RET’s via placement of Bias-T’s at Ground Level and Tower Top, or Bias-T’s at Ground Level and AISG Compliant TMA’s at the Tower Top. When this method is utilized no additional home runs are required as the AISG + DC is present on the RF Coax Feed Line. If required the SCU can directly control the RET’s with a home run and daisy chaining of the remaining RET’s.
Continuous adjustment capability allows changes to the BTS coverage to suit network optimization, changing traffic patterns or seasonal changes such as foliage absorption. Variable Gain AISG 2.0 TMA’s can be remotely adjusted to any value within their specified range in 0.25 dB steps via coax. The SCU can be controlled via an Ethernet port.

Technical Description


The Site Control Unit (SCU) when paired with remote actuators from CCI allows a retrofit to existing Manual Tilt Antennas. The unit provides three RS485 fully AISG and 3GPP compliant control outputs. The SCU is controlled via an Ethernet RJ45 jack.
The SCU when used in conjunction with CCI Remote Electrical Tilt Actuators (RET’s) seamlessly integrates with the carriers existing BTS equipment to achieve the desired performance results. The SCU can feed a maximum of 450 feet and can be daisy chained to up to 24 individual RET’s (can be software upgraded to accommodate 32 RET’s).
The Site Control Unit is designed for Indoor rack mount environments and runs off 24VDC. The unit is fully lightning protected.
Use of AISG Compliant Bias-T’s designed to combine the DC bias and the AISG 2.0 compliant communication link provided by the “Site Control Unit” with the RF signal from the BTS onto the center conductor of the feeder line allows for control of AISG compliant TMA’s. The AISG compliant TMA’s in turn have AISG connectors which can be used to connect cables to control AISG compliant Remote Electrical Tilt Actuators. Brackets for 19” Rack or Wall mounting are supplied with the SCU.


Electrical Specifications

Input Voltage +24 VDC
Supply Current nominal @ +24 VDC ≤ 1.2 A DC
Primary Inrush current ≤ 2.0 A DC
Input Fuse Size 4 A (fast blow)
Output Voltage +12 VDC or +24 VDC (User Selected)
Output Current 3.5 A total
Max number of AISG devices 24 (32 future units via firmware upgrade)
Summary Alarm Relay Dry Contact Rating 10A @ 120VAC/28VDC
User Interface HTML through Ethernet Port; AISG 1.1, 2.0 compatible
Interface to AISG Equipment RS 485


Power Status Indicator GREEN LED
Alarm Indicator RED LED
Run Indicator YELLOW LED


AISG Connector Female 8 pin circular conn. per IEC60130-9 Ed. 3.0 w/screw ring locking
Number of AISG Ports 3
LAN Connectors 1 x Ethernet (RJ-45)
High Speed Serial Data Connector USB 2.0 × 1
RS-232 (Serial) Connector RS-232C
Alarm Connector 5 Pin “Removable” Terminal Block
DC Input Connector 3 Pin “Removable” Terminal Block (2 Usable Pins)
Dimensions (L×H×D)(Without Brackets) 8.66×1.75×7.3 in.(220×44.4×185 mm)
Bracket for 19”
Rack Mtg. / Wall Mtg.
Included / Included
Weight 3.5 lbs. (1.5 kg)


Temperature range 0º to +140ºF (0º to +60ºC)
Protection Class IP20 Minimum

Block Diagram



Dry Contact Relay Pin Assignment
“Removable Terminal Block” Label Function
O1 Normally Closed
O2 Normally Open
O3 Common

Parts & Accessories

Part Number SCU-AISG2-3
Overall Weight 3.5 lbs (1.5 kg)


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