Cisco ASR 902, Hardware Installation Manual

Page: 136 / 160

GPS Port Pinouts
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 19: GPS Port Pinouts
1PPS (Input and Output) 10 MHz (Input and Output)
Input — Rectangular pulse
Output — Rectangular pulse
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
Table 20: GPS Port Pinout for ASR 900 RSP3
1PPS (input and output) 10 Mhz (input and output)
Input — Rectangular pulse
Output — Rectangular pulse
Input — Sine wave
Output — Sine and 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
Cisco ASR 902 and ASR 902U Aggregation Services Router Hardware Installation Guide
122
Troubleshooting
GPS Port Pinouts