24▪ SIGNAL : Select on/off to use alarm by channel.▪ ALARM SET : Check the alarm connection to ensure it is working properly.Press the [SET] button then alarm device will be activated.▪ ALARM CLEAR : Press the [CLEAR] button then alarm will be cleared.[HDD] - When HDD is selected under [TYPE], HDD information will be displayed.[INSTALL] - Formats HDD.5.1.2 ALARM OUT5.1.3 DISK