- This topic has 9 replies, 1 voice, and was last updated 15 years ago by Rajiv Gujral.
11th March 2006 at 13:53 #44473Rajiv GujralGuest
Please suggest me what might be the problem if our link balance is in negative for Stand Alone Sites.
Could it be a H/w fault. And what if link balance is more than the threshold(8).13th March 2006 at 06:20 #44474HiGuest
Please if anyone can let ,me knnow with the reasons when our link balannce crossed the thresholds value. And what might be the reason if uplink is better than downlink. Is there a chance for the hardware fault.
Thanks for the help in advance14th March 2006 at 20:54 #44475Grewal RGuest
Possibility is that there is something wrong with the feeder cable/connectors if systen is not a full duplex.
If system is full duplex chances are with hardware.
Better if you write what make is it?
R.15th March 2006 at 06:38 #44476Tech ManGuest
Check your TRX output power/ performance alarms for that sector. Also check the VSWR for the Tx path. Are you using TMB on your antenna path??15th March 2006 at 11:07 #44477Rajiv GujralGuest
Hi Grewal & Tech Man
Thanx for the reply. The Vendor is NORTEL. We are not using TMB on the antenna path. Mostly this problem, link balance above threshold, exists in the stand alone sites. We are using HD(or By Pass) for the stand alone sites with the configuraion of 2 by 2 by 2. Please let me know what might be the prob tht im getting -ve Link balance and other greater than 8. VSWR and OP is ok.
Thanks & Regards16th March 2006 at 13:38 #44478joeGuest
where is your limitation (UL or DL) ???16th March 2006 at 15:24 #44479Rajiv GujralGuest
What do u mean by limitation, whether its a threshold ur asking for or the problem.
In couple of sites the prob is uplink and rest in downlink.18th March 2006 at 07:29 #44480joeGuest
Limitation in link budget (which is smaller).
if it UL => check your diversity,LNA & BTS RX
if it DL => check your BTS power,TMA, compiner & BTS TX.
# VSWR doesnt impalance your budget, it degrade both side UL & DL.18th March 2006 at 18:11 #44481R GrewalGuest
Joe is right
path balance=(UL PATH BALANC-DL path balance
Acordingly you can go, with this formula.19th March 2006 at 14:07 #44482Rajiv GujralGuest
Thanx Joe & Grewal
I will look for it