Alarm buzzer and GNSS antenna connections ContentsExternal alarm connectionAn external alarm can be connected to the ALARM | VIDEO 1 connector located on the rear of the display, using the Video In/Alarm out cable accessory (part number: A80235). The alarm buzzer sounds an audible alert tone when an alarm is triggered on the display.GNSS (GPS) antenna connectionA passive GNSS antenna is required to obtain a position fix using the display’s built-in GNSS (GPS) receiver. The antenna is connected to the GPS ANTENNA connector located on the rear of the display.Previous topic: Audio connectionsNext topic: Maintaining your display