Sharp VC-488NS Manuale di Servizio Pagina 16

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Chapter 1 - System Description
1PPS Pulse Format
1PPS Pulse
2.048 MHz
New second
mark
488ns
1 second
New second
mark
Figure 1-3: 1PPS Pulse
2.048 MHz
This signal may be used as a synchronization interface. The pulse is a
continuous DC biased square wave with TTL compatible levels when
driving a 50load.
488ns
VOH 2.4 Volts
VOL 0.8 Volts
VOL
VOH
Figure 1-4: 2.048 MHz Signal
Time of Day
This communication port utilizes an RS232 9-pin ‘D’ type female
connector. A full description of the output message is given on page 1-7.
GPS Timing Receiver Installation and Operation Manual
1-6
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