RS-232 Output:
±5V
DC
minimum
±5.4 V
DC
typical
Output impedance 300 Ω, minimum
-13.2 V
DC
to +13.2 V
DC
1PPS Output:
Signal level: 0V to 4.3 V (TTL compatible) into 50 Ω
Output impedance of buffer is ~7 to 10 Ω
Rise/fall times of ~20 nsec.
Pin Assignments
Figure 5-57: DB-9 connector "J2"
Pin No. Signal Name Function
Top row of 5 pins
1 PPS_OUT 1PPS output
2 SERIAL_OUT_TX RS-232 Transmit data
3 SERIAL_OUT_RX RS-232 Receive data
4 NC No connection
5 GND Ground
Bottom row of 4 pins
6 NC No connection
7 NC No connection
8 NC No connection
9 NC No connection
494 SecureSync 2400 User Manual
APPENDIX
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