Dears
In below article will explain in some details RET.
-Remote Electrical Tilt (RET) is a feature by which the Antenna is controlled remotely through the OMC. Either internal or external Remote Control Unit (RCU) is used in order to adjust the electrical tilt of the antenna. There is a RCU for each single band with unique serial number usually used to differentiate between different bands. Usually different RCUs of one sector are connected in a daisy chain as shown in the below diagram
-Supported Antennas
1-Internal RET
JW5880100G
JW5980000G
P65-18-XDHH-R
2-External RET
PW7785
P65-18-XXCHH-N-VF
ATR4517F1
APXVERR26-C
JW5880100G/ JW5980000G
The latest Jaybeam antennas have internal RET motors with mechanical override.
In order to manually adjust the E-tilt value, remove the ruler cap and rotate the knob.
If the cap is removed, an alarm would appear to the OMC indicating RET functionality is disabled.
There are male and female AISG ports and connecting RET cable to any of them should work.
P65-18-XDHH-R
The new Powerwave antenna has internal RET that consists of three replaceable internal RCUs.
The RCUs are connected to each other in a daisy chain scenario.
The RCUs are pre-commissioned and no need to download configuration files
Mechanical override is available by rotating the black knob by using a screw in order to manually adjust the E-tilt and pulling out the ruler to measure the E-tilt.
There are male and female AISG ports and connecting RET cable to any of them should work.
PW7785
The Powerwave antenna (PW7785) has an external RET Motor as shown above.
The motor has three slots to fit the 3 rulers of electrical tilt.
The motor has an AISG port that controls the 3 electrical tilts (GSM, DCS, 3G) of the antenna.
-Connectivity
* Directly to the RRU:
This scenario is used where Huawei RRU is Located near the antenna. One port of the RET cable is connected to the RRU (DB9 connector) and the other is connected to the antenna RCU. The below AISG cable type is used:
* Using TMA:
This scenario is used where TMA exists on the feeders. One port of the RET cable is connected to the TMA and the other is connected to the antenna RCU. The below AISG cable type is used:
BR,
