HELP Regarding my dish antenna

Pramain

Frequent Flyer
hi
i have videocon hd and my dish antenna is 65cm and dishtv brand.
it has some stain on the dish because i live near sea, please check the image below


i used to have good signal strength and quality, this was last year. please check the image below


please check my current signal strength and quality,


should i change my dish antenna to get good signals. the reason is sometimes hd channels are getting stuck and next few screens move slow motion after it will resume normal.
i have changed the lnb but no help. same results.

if you think i have to change the dish antenna, please help me with that.
should i replace the same dishtv brand antenna or videocon d2h antenna, eurostar antenna ?

thanks :)
 
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