BT have raised my SNR margin, despite my line being stable

[#1]

@James:  Please can you supply me with the information mentioned in Anotherone's last post (exact dates and times of analysis & whether the resync was due to the test).
@Anotherone: I spent months looking for sources of interference within my house.  I could not find any.  Despite the speed problems on my line I have very few resyncs and none in recent history (apart from the one that may be caused by the recent test) [I am not counting manual reboots and ones triggered by noise margin changes].  There may be too many errors according to BT to keep my target margin low, but I have no idea how many that would be.

[#2]

Hi mapletree,
The test would have been run a few minutes before the ticket was updated, so about 5pm is right - and it looks like partial results from a one shot check, which may well have knocked the sync out briefly. I'm not 100% sure but it is the most likely reason, and was run at around the right time.

[#3]

Thanks for the info.  Is there any news on the other point (date/time of the analysis period on my ticket)?

[#4]

The default period is the past 3 days, I'm fairly sure that even if we specify a different time period in the test it still checks the past 3 days anyway. We don't often change those dates so it's a fairly safe bet the analysis period was for the 3 days before and including the test date.
Sorry I missed that off,

[#5]

The table that contains the analysis data also shows the date of 26th September, which is more than three days before the test.  Therefore I think the analysis data must be from earlier.  Doesn't anyone actually know?

[#6]

I'll try and find out.

[#7]

It's the RRT test (Reactive Repair Tool).
It looks back 14 days.

[#8]

So it would have covered the period where my target margin was changed.
Upstream margin is constant at 17dB even into the evening.

[#9]

It's going from bad to worse again.  A few drops and an even lower sync speed now 
Does this make sense to anyone:

Counters        Down            Up
SF:             24307           24306
SFErr:          0               0
RS:             826458          205598
RSCorr:         44              0
RSUnCorr:       0               0
HEC:            0               0
OCD:            0               0
LCD:            0               0
Total Cells:    2152032     
Data Cells:     13703       
Drop Cells:     0
Bit Errors:     0               0
ES:             618             0
SES:            3               0
UAS:            164             0
AS:             414
INP:            0.73            1.00
PER:            1.91            1.96
delay:          4.36            4.50
OR:             29.30           28.44
Bitswap:        0               0
Total time = 1 days 6hours 15min 25sec
SF  = 11474901   CRC = 2147
LOS = 3   LOF = 27   ES = 618
Latest 1 day time = 6hours 15min 25sec
SF  = 1322483   CRC = 540
LOS = 1   LOF = 9   ES = 81
Previous 1 day time = 24hours 0sec
SF  = 5082319   CRC = 333
LOS = 0   LOF = 0   ES = 260