Table 6-5. RJ-48C Pinout
1 2 3 4 5 6 7 8
Pin
Signal
1
End of line termination (120Ω to pin
2)
2
End of line termination, with pin 1
3
GND
4
TX Ring -
5
TX Tip +
6
Not Connected
7
Not Connected
8
Not Connected
Connecting a cable into a RJ-48Cport:
• If not rack mounted, place one hand on the GridTime 3000 to ensure it doesn’t move
• Gently slide the cable’s RJ-48C plug into the port. Ensure the orientation of the plug aligns with the orientation of
the port.
• Connect the other end of the cable into the relevant port in your network.
Removing a cable from a RJ-48C port:
• If not rack mounted, place one hand on the GridTime 3000 to ensure it doesn’t move
• Press down on the flaps on the cable’s RJ-48C plug
• Gently slide the cable out of the port
6.6.2.3
BNC Ports
This section describes how to form a connection to the GridTime 3000's BNC ports.
The GridTime 3000 features eight BNC ports (Ports 3-10). Each port can output the standard GridTime 3000 pulse
output signals:
• DCLS IRIG-B
• Modified Manchester IRIG-B
• Square wave pulses with a configurable frequency, duration, and phase offset (user-defined pulses)
• DCF77 simulated receiver time signal (DCF77)
The BNC ports are split into three subgroups, each with a unique additional functionality:
• the first two BNC ports (Ports 3 and 4) can also output fixed frequency sinusoidal or square wave signals
• the second four BNC ports (Ports 5-8) can also output AM-IRIG B
• the final two BNC ports (Ports 9 and 10) can also receive a 0-5 V TTL DCLS IRIG-B signal with C37.118.1
extensions as a timing reference input.
Figure 6-12. BNC ports
Fixed
Frequency
/ TTL Ports
AM IRIG / TTL
Ports
DCLS IRIG In
/ TTL Out Ports
Installation
©
2022 Microchip Technology Inc.
and its subsidiaries
Manual
DS00004572A-page 41
