H.264 Super Digital Video Recorder User Manual46Note: using PTZ linkage, need to set preset, cruise between points and scan etc. parameters in “desktopshortcut menu” “PTZ control”“setting”.Picture 4.25 PTZ activationDelay: After alarm stop, the extended period of time to stop alarm recording, the range is 10~300 seconds.Show Message: Pop the alarm information dialog box in the local host computer screen.Send Email: means sending an email to user when the alarm is turned on.Note: if sending email, need to do relative setting in “main menu” “network setting” “networkservice”Buzzer: Alarm occurs, the equipment issue "Didi" the sounds of two long ring.FTP upload: Alarm occurred while sending alarm events to the FTP server.Note: if FTP sending, need to do relative setting in “main menu” “network” “net service”4.5.2 Video BlindWhen the video image is influenced by outer environment or bad brightness and reaches the set sensitiveparameter, the video blind function is turned on and the linkage function is turned on.Picture 4.26 Video Blind