Motorola PTP 500 User's Guide Page 181

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PTP 300 and PTP 500 Series User Guide PTP-SYNC specifications
phn-1115_006v000
Sep 2010
4-29
Table 4-27 PTP-SYNC unit timing specifications - 1PPS IN (SMA)
Category Specification
Signal type 1 Hz signal
Pulse Positive pulse, reference edge is rising edge
Maximum voltage 5 V
Threshold 0.4 V to 0.6 V
Input impedance 45 ohms to 55 ohms
Pulse width 1μs to 500ms
GPS/SYNC IN pinout description
The pinouts of the PTP-SYNC unit GPS/SYNC IN port are specified in Table 4-28.
Table 4-28 GPS/SYNC IN port pinouts
Pin no. Connector pinout
signal name
Signal description
Pin 1 12VGPS 12 V output to GPS receiver module, 250 mA max
Pin 2 GND Ground
Pin 3 GPS_1PPSA 1 Hz pulse input
Pin 4 GPS_RXDA GPS receive data
Pin 5 GPS_RXDB GPS receive data
Pin 6 GPS_1PPSB 1 Hz pulse input
Pin 7 GPS_TXDA GPS transmit data
Pin 8 GPS_TXDB GPS transmit data
NOTE
The GPS_1PPS, GPS_RXD and GPS_TXD signals conform to International
Telecommunication Union (ITU) recommendation V.11 (RS422).
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