Chapter 3 Connecting Cables
RFD01F Series Installation Manual v1.0
84
© Samsung Proprietary and Confidential
Checking RF Cable Connection
After connecting the RF cables, perform the continuity test and feeder cable return
loss to check if the RF cable is changed and measure VSWR of antenna and RF
cable.
Measure all cables of section
①
~
②
. The measured VSWR should be the
specification value or less. If the VSWR exceeds the specification value,
disassemble the connector and measure each section separately.
If the VSWR value for minimum cable bend radius and length of RF cable is not
applied, system may not work properly because RF signals cannot transmit or
receive smoothly. So, the VSWR value for minimum cable bend radius and length
of RF cable must be checked and applied.
When measuring VSWR, if operator opens the antenna port when the transmission
output is not completely off, a spike signal may flow into the reception path, which
may cause damage to LNA. Make sure the transmission output is completely off
when measuring VSWR.
When RF cable connection integrated RET signal and DC power is applied using
ANT0 port of RRU, RET cable should be installed separated from RF cable to RF
Antenna.
Depending on the supplier or manufacturer of antenna/arrestor the connector type may be
different. Also, the detail specifications of a connector may be different depending on cable
type even for the same connector type. Therefore, check the detail specifications of a
connector before preparing parts.
Ex) DIN Type-Male: for 1/2 in. Feeder line, for 7/8 in. Feeder Line
RF Cable Identification Tag Installation
Attach the identification tape in the below table to the RF cable.
Table 28. RF Cable Identification Tag
Category
Description
Installation position
Attach the identification tag to the both ends of the antenna.
Materials
Use the material of aluminum coated by vinyl for the identification tag.
Fixing method
Antenna side: Attach the tag to the feeder line using binding strings
through the two holes on the tag.
Equipment Side: Cover up the feeder line with the tag and fix it using
Connection Part of System External
Interface Connector
Antenna
①
②