Ant	High performance antenna for challenging EMI environments. Available with GPS option only.
DC	DC Operation: Requires the unit to be powered from a DC source exclusively, typically +12 to +35 VDC.
EXT	External Time Base: Available when a user prefers to reference the clock of an existing source of 1 MHz, 5 MHz or 10 MHz. Frequency is auto-detected.
LED	LED:Provides a front panel mounted "Time Code Lock" green LED.
OCXO	OCXO: Provides an Oven Controlled Crystal Oscillator.
Red	Red LED Displays
UL	"UL" Approved Power Supply: The unit is supplied with a UL/CSA approved wall mount power supply.