Cisco ASR 903 Installation Guide

DescriptionDirectionSignal
Name
Pin
Not used——6
Not used——7
Not used——8
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 26: GPS Port Pinout
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 ohms50 ohmsImpedance
26 microseconds50% duty cyclePulse Width
40 nanosecondsInput—AC coupled
Output—5 nanoseconds
Rise Time
Table 27: 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 ohms50 ohmsImpedance
26 microseconds50% duty cyclePulse Width
Cisco ASR 903 and ASR 903U Aggregation Services Router Hardware Installation Guide
162
Troubleshooting
GPS Port Pinout

Cisco ASR 903 Specifications

General

Brand	Cisco
Model	ASR 903
Category	Network Router
Language	English