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3.5 One-Pulse-Per-Second Output

The one-pulse-per-second output is provided for applications requiring precise timing

measurements. The output pulse is 1usec in duration. The rising edge of the output

pulse is accurate to +/-1usec with respect to the start of each GPS second. The

accuracy of the one-pulse-per-second output is maintained only when the receiver has

valid position fix.

3.6 RTCM Differential Data

By using differential GPS (DGPS) correction data in RTCM SC-104 format with message types

of 1, 2, 3, and 9, position accuracy of less than 5 meters can be achieved. RXD1, pin-8 of the

10-pin Molex connector shown in figure 2, or pin-11of the 16-pin header shown in figure 3,is

used as the DGPS input. Differential correction is applied automatically when the correction

data is received at 9600baud.

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Deluo TRISTAR25 Bedienungsanleitung Seite 11