Cisco ASR 907, Руководство по установке оборудования

Страница: 168 / 204

GPS Port Pinout
The platform is capable of receiving or sourcing GPS signals of 1 PPS & 10 MHz. These interfaces are
provided by two mini-coax 50-Ohm, 1.0/2.3 DIN series connector on the front panel. Similarly there are two
mini-coax 50-Ohm connectors provided in the front panel to output this 1PPS and 10MHz.
The table below summarizes the GPS port pinouts.
Table 15: GPS Port Pinout
1PPS (input and output) 10 Mhz (input and output)
Input—Pulse shape
Output—Pulse shape
Input—Sine wave
Output—Square wave
Waveform
Input— > 2.4 volts TTL compatible
Output— > 2.4 volts TTL compatible
Input— > 1.7 volt p-p(+8 to +10 dBm)
Output— > 2.4 volts TTL compatible
Amplitude
50 ohms 50 ohms Impedance
26 microseconds 50% duty cycle Pulse
Width
40 nanoseconds Input—AC coupled
Output—5 nanoseconds
Rise Time
Time of Day Pinout
The table below summarizes the ToD pinouts.
Table 16: ToD pinouts
Description Direction Signal
Name Pin
Do Not Connect Output or
Inputs RESERVED 1
Output or
Inputs RESERVED 2
1PPS RS422 signal Output 1PPS_N 3
— — GND 4
— — 5
1PPS RS422 signal
Input 1PPS_P 6
Time of Day R422 output or input signal Output or input TOD_N 7
Time of Day R422 output or input signal Output or input TOD_P 8
Cisco ASR 907 Router Hardware Installation Guide
158
Troubleshooting
GPS Port Pinout