CommScope ATSBT-4G Series User manual

Installation
diagram to guide
proper installation.
Figure 1. ATSBT-BOTTOM-FM-4G Smart Bias Tee.
GENERAL INFORMATION
• Smart Bias Tees are designed to eliminate the long AISG data
cable run from the base to the top of a cell site tower by “piggy-
backing” power and control signals onto an existing RF coax.
• Each Smart Bias Tee includes grounding hardware that can be
used with the ATGK-COMP grounding kit for added lightning
protection (Figure 1).
Note: An AISG TMA includes its own Smart Bias
Tee functionality at the top of the site. Therefore, a
top Smart Bias Tee unit is not needed if an AISG
TMA is used on top.
• The model numbering sequence for this series is encoded as
follows:
ATSBT- TOP- FM- 4G
Gender of connector on antenna
side of bias tee: F emale or M ale
Gender of connector on BTS side
of bias tee: F emale or M ale
Position is TOP or BOTTOM
S mart B ias T ee
(continued on page 2)
Male coaxial connector on the
antenna side of bias tee.
Grounding
Hardware
Male AISG Port
Female coaxial connector on
the BTS side of bias tee.
Wear shoes with rubber soles and
heels. Wear protective clothing
including a long-sleeved shirt and
rubber gloves.
Do not install on a wet or windy
day or when lightning or thunder
is in the area.Do not use metal
ladder.
Do not install near power lines.
Power lines, telephone lines, and
guy wires look the same. Assume
any wire or line can electrocute you.
WARRANTY NOTICE
Proper installation procedures must be followed when installing and operating RET equipment. Failure to assure installations are done
properly by trained installation personnel and to follow procedures discussed in this bulletin may cause warranty for such products to be
void.
Commscope requires pretesting actuators on the ground prior to installation, using the Commscope portable controller and
the latest version of the controller software (available online at www.commscope.com/resources/software). This will verify proper
actuator functionality and also ensure that the latest available actuator firmware release is installed on the actuator. Failure to conduct
pre-test and pre-installation procedures defined by Commscope will void warranty.
Unauthorized removal of a protective shroud to replace actuators voids the Commscope warranty.
SAFETY NOTICE
The installation, maintenance, or removal of an antenna requires qualified, experienced personnel. Commscope installation instructions
are written for such installation personnel. Antenna systems should be inspected once a year by qualified personnel to verify proper
installation, maintenance, and condition of equipment.
Commscope disclaims any liability or responsibility for the results of improper or unsafe installation practices.
It is recommended that transmit power be turned off when the field installation is performed. Follow all applicable safety precautions as
shown on this page.
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© 2021 CommScope, Inc. All rights reserved.
Visit our website at www.commscope.com or contact your local CommScope representative or BusinessPartner for more information.
All trademarks identified by ® or ™ are registered trademarks or trademarks, respectively, of CommScope, Inc. 653102 G (5/26)
Page 1 of 5
653102 Revision G, May 2021
ATSBT-4G Series
AISG Smart Bias Tees

INSTALLATION DIRECTION
CAUTION:
The Smart Bias Tee should be installed following the direction
mark on surface so that the AISG output connector is facing
towards the ground.
Notice this mark
FORBIDDEN INSTALLATION POSITION
Avoid horizontal position and AISG port facing up or tilt up.
Figure 2. Installation direction Figure 4. The AISG port facing up or tilt up is forbidden.
RECOMMEND THE INSTALLATION POSITION
Vertical position: Keep the AISG port facing ground.
Figure 3. Recommended vertical position
Figure 5. The horizontal position is forbidden .
TIGHTENED AISG CONNECTOR
CAUTION: Hand tighten only! AISG connectors are designed
so that hand tightening will provide a seal to IP67. Overtightening
will destroy the connector.
Visual inspection after tighten: 1mm gap left as shown in
figure 6.
Don’t require any weatherproof tape for AISG connector
once it be hand tightened properly
Figure 6. Hand tightened AISG connector .
(continued on page 3)
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© 2021 CommScope, Inc. All rights reserved.
Visit our website at www.commscope.com or contact your local CommScope representative or BusinessPartner for more information.
All trademarks identified by ® or ™ are registered trademarks or trademarks, respectively, of CommScope, Inc. 653102 G (5/26)
Page 2 of 5
653102

Install top and bottom ATSBT-4G Series Smart Bias Tees by
following steps 1 through 9, detailed in Figure 7.
Connect the top Smart Bias Tee on the coaxial feeder cable that 1.
carries the AISG signal.
2. Connect the top coaxial connector on the Smart Bias Tee to the
antenna with a coaxial jumper cable.
TOP UNIT INSTALLATION INSTRUCTIONS
INSTALLATION PROCEDURE
(continued on page 4)
3. a) Use the included Dow Corning 4 silicone grease and fill the
clearance between insulator and body of the female RET
control cable connector. please follow below steps to paint
silicone grease.
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Page 3 of 5
653102

Figure 7. Example Of One Set-Up Using The ABSBT-4G Series
Smart Bias Tees In A RET System.
Antenna
Coax Jumper Cable
Male Coaxial
Connector
ATSBT-
TOP-FF-4G
Male AISG
Connector
Actuator
Female AISG
Connector
RET Control
Cable
Male
Coaxial
Connector
Coax Feeder Cable
Female
Coaxial
Connector
ATSBT-
BOTTOM-FM-4G
Male Coaxial Connector
Coax Jumper Connector
RET Control
Cable
Female AISG
Connector
To Controller
Bolt
Lockwasher
Flatwasher
Spacer
Grounding
Cable (Not
Supplied)
Grounding Cable
(Not Supplied)
Flat Washer
Split Flat
Washer
Hex HD Bolt
Grounding
Cable
Spacer
Additional Product:
• The ATGK-COMP Grounding Kit
is used to ground the Smart Bias
Tee and is sold separately.
Figure 8. ATGK-COMP Grounding Kit.
BTS
TOP UNIT INSTALLATION INSTRUCTIONS
INSTALLATION PROCEDURE
BOTTOM UNIT INSTALLATION INSTRUCTIONS
4. Connect a bottom Smart Bias Tee on the same coaxial
feeder cable as the top bias tee or AISG TMA.
5. Connect the lower coaxial connector on the Smart Bias
Tee to the BTS with a coaxial jumper cable.
6. Attach the female end of the RET control cable to the
Smart Bias Tee, and the male end to the controller.
(See caution above.)
Note that the label on the Smart Bias Tee includes a diagram to
guide proper installation.
POST INSTALLATION INSTRUCTIONS
These steps apply after top and bottom units are in place:
7. a) Carefully tighten DIN connections until they are snug,
but do not apply heavy force with pliers.
b) Weatherproof the DIN connections, carefully covering
all junctions and the outer jacket of the cable.
8. a) Remove bolt, washers, and spacer from the Smart
Bias Tee ground (supplied).
b) Connect ATGK-COMP ground cable (not supplied) to
Smart Bias Tee, as needed.
c) Reattach bolt and washers to secure the cable.
9. Attach ground cable to tower ground with M10 x 25mm
bolts, nuts, and washers (provided with ATGK-COMP kit)
or with other appropriate hardware (Figure 8).
10. Use cable tie to fix the Smart Bias Tee properly to avoid the
connector loose by vibration.
After installation of Smart Bias Tee units is complete, connect the
remaining Teletilt system components according to their respective
installation instructions (Figure 9).
After all system components are installed, connect the RET line to
the controller and verify successful operation. Refer to Table 1,
Troubleshooting When Power Is Not Provided To Tower Top, if
needed.
(continued on page 5)
b) Depending on the RET cable length, CommScope
recommends forming a loop in the cable as shown
below in step 3 of Figure 7. Next attach the male
end of the RET control cable to the Smart Bias Tee
and the female end to the actuator.
c) With the AISG connector at the bottom of the Smart
Bias Tee, the RET cable should hang down so water
drains away from the connector.
Install top and bottom ATSBT-4G Series Smart Bias Tees by
following steps 1 through 9, detailed in Figure 7.
www.commscope.com
© 2021 CommScope, Inc. All rights reserved.
Visit our website at www.commscope.com or contact your local CommScope representative or BusinessPartner for more information.
All trademarks identified by ® or ™ are registered trademarks or trademarks, respectively, of CommScope, Inc. 653102 G (5/26)
Page 4 of 5
653102

Antenna
Actuator
AISG
Control
Cable
Coaxial
Cable
ATSBT-TOP-FF -4G
Smart Bias Tee
AISG
Connector
BTS
ATC200-LITE USB
Portable Controller
Lightning
Protection Unit
Ethernet
Cable
Computer
Interface
Not Supplied
AISG
Control Cable
ATSBT-
BOTTOM-FM-4G
Smart Bias Tee
ATC300-1000
Controller
Note: Commscope recommends using a jumper
cable between the top SBT and the antenna
to prevent excessive force on the connectors and
to improve spacing to make waterproofing
connectors easier.
Figure 9. Control System with AISG Smart Bias Tees.
Table 1. Troubleshooting When Power Is Not Provided To Tower Top.
FINAL SYSTEM INSTALLATION DIAGRAM
The diagram below (Figure 9) shows the ATC300-1000 controller or the ATC200-LITE-USB portable controller used in a Control
System. Power and control signals are directed through ATSBT-4G series Smart Bias Tees to the antenna.
TROUBLESHOOTING WHEN POWER IS NOT PROVIDED TO TOWER TOP
Possible Cause Solution
One or both of the Smart Bias Tees are
installed backwards.
See Figure 7 and installation diagram on the label for correct orientation.
A dc shunt has been installed in the RF
coax cable between the Bias Tees.
Re-install any dc shunt devices either before the bottom bias tee or after the top bias tee. The path be-
tween bias tees must not be shorted.
A short exists in one of the AISG cables
or devices at the tower top.
Disconnect the system from the top Smart Bias Tee unit, then reconnect one leg at a time to progressively
identify the short. Note Andrew offers the ATTK200-KIT cable testing kit to simplify system troubleshooting.
www.commscope.com
© 2021 CommScope, Inc. All rights reserved.
Visit our website at www.commscope.com or contact your local CommScope representative or BusinessPartner for more information.
All trademarks identified by ® or ™ are registered trademarks or trademarks, respectively, of CommScope, Inc. 653102 G (5/26)
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653102