How long time needed to get accurate frequency from SDH

[fl]

Hi,
I do not know SDH, thus seek help here. I am working on a project
which needs the accurate frequency information. We plan to get that
from E1/T1 dropped from SDH. As far as I know, SDH has pointer
adjustment to accommodate different signal sources or other
imperfections. I want to know the maximum SDH pointer adjustment
period for a stationary resource (which has a fixed, small frequency
offset). With that SDH time adjustment period, I can design an average
fuction to get the accurate frequency.


Thanks a lot.

[fl]

Post by fl
Hi,
I do not know SDH, thus seek help here. I am working on a project
which needs the accurate frequency information. We plan to get that
from E1/T1 dropped from SDH. As far as I know, SDH has pointer
adjustment to accommodate different signal sources or other
imperfections. I want to know the maximum SDH pointer adjustment
period for a stationary resource (which has a fixed, small frequency
offset). With that SDH time adjustment period, I can design an average
fuction to get the accurate frequency.
Thanks a lot.

A little further information adds. Once I was involved in a GSM
project, I had the impression that the time was about 15 minutes. I
am not sure about the time because it was too long ago. It onl sounds
to me in the minutes order or so.

Thanks.

[Lucifer]

Post by fl
Hi,
I do not know SDH, thus seek help here. I am working on a project
which needs the accurate frequency information. We plan to get that
from E1/T1 dropped from SDH. As far as I know, SDH has pointer
adjustment to accommodate different signal sources or other
imperfections. I want to know the maximum SDH pointer adjustment
period for a stationary resource (which has a fixed, small frequency
offset). With that SDH time adjustment period, I can design an average
fuction to get the accurate frequency.

WWV.