SmartBiasT_IG
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Smart Bias-T Installation Guide
Amphenol Antenna Solutions Smart Bias-T, part number MODEMxxx (also known as SBT-6962690-xxx) is used in place of traditional
AISG “Home Run” cables. The Smart Bias-T cable eliminates the need for the home run cable by integrating DC power and AISG
control signals onto the coaxial feeder line. The “xxx” designation is used for defining the gender of the three connectors (two for the
coaxial feeder and jumper lines and one for AISG control and power) on each Bias-T. If a TMA is not used, two Bias-
T’s are typically
required
—one at the bottom of the tower and one at the top. Some BTS manufacturers integrate this Bias-T function into their NodeB,
eliminating the need for the bottom Smart Bias-T cable. Please talk to your BTS representative to see if this feature is available.
Figure 1.1 shows a MODEM100, which contains two female coax connectors and a male AISG connector. Please see the MODEMxxx
specification sheet and ordering guide for more information. The Modem100 series will always have a male AISG connector, which will
always be used at the bottom of the tower. The Modem200 series will have a female AISG connector, and will be used at the top of the
tower.
Figure 1.1. Modem 100 Smart Bias-T
.
