CRC error check

Pls, on my yahclick installation with hn9600, i locked the satellite with a very good signal strenght and having passed all the test DAPT and OVT, my provider is saying that they are seeing CRC errors on my link. Even when using a 2m cable lenght they are still seeing errors. What could be the cause of the error and how will solve it?

Just to add my two cents, when we face CRC errors, sometimes indeed it is because of cable and point issue, as Eric mentioned. On C band, sometimes it related to terrestrial interference. However, most of the times we face CRC on the inbound (the site uplink), we manage to fix it only by replacing the BUC, after eliminating anything else. I just share my personal experience...

It would be helpful to clarify where the CRC errors are being detected, either in your modem when receiving the outlink from the hub, or at the hub regarding the burst transmissions from your remote site.

If the errors occur in your modem when receiving the outlink from the hub then local interference might be the cause. Is there any local possible source ? It seems unlikely at Ka band, but look about. Is there radar nearby, electrical equipment, lights etc. Do the errors occur at particular times of the day ? If the CRC errors occur only at the instant when you transmit a burst, the fault could be DC current cable problems, BUC, Modem, LNB or your power supply.

More likely the CRC errors are detected on the packets you transmit to the hub, in which case your transmit bursts are low level or distorted. If your outlink received signal is very strong this makes it extra difficult to the point the dish accurately. It is possible to have a perfect and excellent receive signal for a wide range of physical movement of the dish pointing.

I don't know what is "DAPT/pointing test (center test)" but I doubt that it includes de-pointing the dish in 4 directions to equal degraded levels, marking these points and physically halving the distances.

Dish pointing, cable connections, BUC faulty or weak power supply are all possibilities.

If the hub examine your bursts with a spectrum analyser in zero span they can see if the burst amplitude is correct, if the amplitude remains stable during the burst and if the burst has clear guard time gaps from the preceding and following bursts and is not overlapping. Your lat and long should be stored in the hub for initial acquisition but, once working, the hub should adjust your burst timing dynamically to keep it clear of other bursts.