hi im a newbe so please be kind, 
  
i have three swann 750 ptz dome cams. 
  
QUESTION 
  
how do i opparate the three cams when there is only one ptz imput on my dvr, 
  
1 buy a pacific  ptz controller ie one with three ptz imputs ect (please help) 
  
at the moment im useing three diffrent cotollers witch came with each swann 750 ptz cam and it driveing me mad.