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The circuit shown above translates the RS422 signals used by the GSyncQ/T to RS232 Levels.
A CMOS level PPS signal is also available.
The 3 RS 485 transceivers shown can be socketed for easy replacement should this be deemed useful.
ADM1485AN or equivalent RS485 transceivers can also be used.
The circuit can also be used with other GPS receivers that use RS422 level signals.