RF Unit ALD Current Out of Range

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Ronney   钻石会员    发表于 2014-5-25 15:37:36   最新回复:2018-06-07 12:46:21

RF Unit ALD Current Out of Range

This alarm is reported when the current supplied by the RF unit to the antenna device through feeder or multi-wire cable is beyond the normal range.



The antenna device can work normally, but some secondary functions of the antenna device fail.


Reason may behind for this alarm:

  • The preset ALD current threshold of the RF unit is incorrect.
  • The feeder connector is loose or waterlogged.
  • The feeder is deformed.
  • The jumper between the feeder and the antenna device is loose.
  • The ALD power supply circuit of the RF unit is faulty.
  • The antenna device is faulty. 

Need to check TMA is phsically installed or not.If TMA is not installed but configured in BSC, we need to deactivate the TMA.

MML commands:

* SET BTSTMAPWR.(Tributary No:0, TMA Power Supply Enabled)

* SET BTSRXUBP(Antenna Tributary 1 Flag:ON, Antenna Tributary 2 Flag: OFF, ANT_A ALD Power Switch : ON, ANT_B ALD Power Switch: OFF)


In MRFU, there are two ports for TMA .  If there is one MRFU/cell  then both port is connected to TMA . If there is two MRFU/cell then ‘port A’ of both MRFUs  are to be connected to TMA. The port  connected to TMA  will have the  status  “YES”.

In case of one MRFU/cell both ports’ status should be “YES”

In case of two MRFU/cell  “Antenna Tributary 1 Flag” status should be “YES”

If there is no TMA then both ports’ status should be “NO”



For activation:1,then 2

For deactivation: 2 then 1


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rupak   银牌会员    发表于 2014-5-30 03:21:22

thanks bro for your experience note 

s_kumar   白金会员    发表于 2014-5-26 16:20:10

if there is no TMA, then the alarm will appear or not.?
saiyan255   银牌会员    发表于 2014-5-29 01:07:39

Important alarm for TMA
s_kumar   白金会员    发表于 2014-5-29 02:02:52

documentation very useful

user_2837311   钻石会员    发表于 2018-6-7 12:46:21

useful document, thanks
Have a nice day
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