IntroductionWARNINGSee the Important Safety and Product Information guide in theproduct box for product warnings and other importantinformation.Setting Up the Astro SystemBefore you can use all the features of the DC 50 device, youshould update your Astro to the latest software version. See theAstro 320 with DC 50 Owner's Manual.You must set up the Astro handheld device and the DC 50 dogcollar device before you can use the devices.1 Install batteries in the handheld device (Installing Batteries).2 Charge the dog collar device (Charging the Dog CollarDevice).3 Turn on the devices (Turning On the Devices).4 If necessary, add the dog collar device to the handhelddevice (Adding a Dog).5 Acquire satellite signals (Acquiring Satellite Signals).Device OverviewsAstro 320 Handheld DeviceNOTICEAvoid using a high-powered radio (greater than 5 watts) in closeproximity to the handheld device. It may cause irreversibledamage to the handheld device.À GPS antennaÁ VHF antenna Power keyà DisplayÄ KeypadÅ USB port (under weather cap)Æ microSD™ card slot (under battery door)Ç Mounting spineÈ Battery cover D-ringKeypadIN Select to zoom in on the map.OUT Select to zoom out on the map.MAP Select to view the map.MENU Select to open the menu for the active page.Select twice to open the main menu.ENTER Select to select options and acknowledge messages.BACK Select to cancel data entry or return to the previous menuor page.MARK Select to mark your current location.DOG Select to view the dog tracking page.Select to view or scroll through options and to move themap pointer.Locking the Keypad1 Select .2 Select OUT.DC 50 Dog Collar DeviceÀ VHF antennaÁ Collar GPS antennaà Power keyGetting More InformationYou can find more information about this product on theGarmin® website.• Go to www.garmin.com/astro.• Go to www.garmin.com/outdoor.• Go to http://buy.garmin.com, or contact your Garmin dealerfor more information about optional accessories andreplacement parts.Getting the Owner's ManualYou can get the latest owner's manual from the web.1 Go to www.garmin.com/support.2