Sharp VC-488NS Manual de Serviço descarregar pdf (Página 16)

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 50Ω load.

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

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