The GPSClock Model 200 is a clock that is accurate to a millionth of a second. It is not like the radio 'atomic' clocks that are accurate to half a second or so. For more details about how the clock works and what it is good for, read the FAQ.

Features:

• Operates anywhere on the surface of the Earth
• Compact, weatherproof, easy to mount
• Wide supply voltage range, 8V-40V
• 1W typical power consumption
• PPS pulses accurate to plus or minus 1 microsecond of UTC or better
• Fifteen-meter (fifty-foot) cable included
• Shuts off PPS output when not in synch
• Designed specifically for timing applications
• Can be configured to delay/advance PPS pulse
• Can provide position data in WGS84, WGS72, NAD83, NAD27, and other formats
• Can maintain timing accuracy with only one satellite
• Low cost
• Includes detailed manual

The GPSClock 200 has an RS-232 output that provides NMEA time codes and a PPS output signal. About a half-second before the next second, it outputs the time of the next PPS pulse in either GPRMC or GPZDA format. Within one microsecond of the beginning of the UTC second, it brings the PPS output high for about 500 ms.