hi i have an annke dvr 
i have 
 1    1080p cvi camera by the front door 25fps 
1   960p camera by the back door 25fps 
1   960p camera on the car25fps 
i replaced the one on the car with a 1080p cvi sony starvis camera and now the fps on the front door cvi camera has dropped to 7fps and wont go higher than 7fps, 
silly thing. 
if i remove the new 1080p cvi camera i can change front door camera to 25fps , but not with the new camera conected. 
hope someone can help as i am pulling my hair out and annke are useless . 
  
here is a link to my dvr . 
http://www.annke.com/annke-4ch-1080p-ahd-security-system-dg41nc.html