NaviTEK NT 153800 Iss 1User Guide Page 22Specifications - NaviTEK NTConnectorsTest PortsRJ45Used for - Cable Test- Ethernet TestConnector type - Lifejack with user-replaceable contactsSystem PortsUSBUsed for - Software UpdateClass - HostConnector type - AUSB type – 1.1PowerUsed for – Battery charging- Mains powering via adaptorConnector type – 2.5mm pin power jackPolarity – Centre pin positiveVoltage – 12vCurrent – 2 ampLocation – Bottom of optional power module(Not present in standard alkaline battery pack)ControlsON/OFFPush buttonUsed for – Power ON/OFFFunction KeysF1 to F3Used for – Screen-defined functionsNavigation KeysCursor and ENTERUsed for – User interface navigationEscapeUsed for – Return to previous menuAutotestUsed for – Launch of automatic test functionResetPush buttonUsed for – Escape from exceptional lockup condition