Symmetricom XL-GPS - Manual (Page 15)

997-01530-01, Rev. C-25, Jan 2008 5
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S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S
Network Port 10/100
The Ethernet port interface is:
J1 - Optional TI/ET
The TI/ET configuration is via the Keypad, Serial I/O, and Network port. J1 accepts an external 1 PPS or
Event input signal and measures it against the system-derived time. The a minimum pulse width of the
input signal is 100 nS. The input impedance is selectable at 100 k
Ω or 50 Ω. The rising edge of the pulse
is measured with 5 nS resolution relative to the system clock time.
J2 - Rate Out
The Rate output is default 10 MPPS and configuration is via the Keypad, Serial I/O, and Network port.
Type: Standard RJ-45 8 pin connector, 10 Base-T and 100 Base-T standards.
Frame format: IEEE 802.3
Pulse width: 100 nS, min.
Active Edge: Rising
High Level: Logic Hi >1.25 V < 10V
Low Level: Logic Low < 1.25 V >0V
Impedance: 100 k Ω or 50 Ω
Resolution: 5 nS, single shot
Accuracy: Refer to “Time and Frequency Accuracy” on page 3
Qty: 1
Connector: BNC female
Rate: 1 PPS, 10 PPS, 100 PPS, 1 kPPS, 10 kPPS, 100 kPPS, 1 MPPS,
5 MPPS, 10 MPPS
Accuracy: Refer to “Time and Frequency Accuracy” on page 3
Duty cycle: 60/40%+/-10%
Amplitude (TTL): TTL Levels into 50 Ω
Qty: 1
Connector: BNC female