Twisted Pair/Coaxial Cable Connections
See Figure 1 below for RJ-45 pin connections.
1) Both the 465MC and the 465F have a shielded RJ-45 jack.
2) The 465MC has male 1.6/5.6 mm. coaxial connectors (i.e., center
conductor is a pin) and the 465F has female 1.6/5.6 mm. coaxial
connectors (i.e., center conductor is a receptacle).
3) Pins 1 and 2 of the RJ-45 jack are the transmit data signals.
4) Pins 4 and 5 of the RJ-45 jack are receive data signals.
5) The shield of the RX IN coax connector may be connected to RJ-45
(pin 6) by jumper JP2 (on).
6) The shield of the TX OUT coax connector is connected via JP1 to
transmit data shield, RJ-45 (pin 3) and the shield of the RJ-45 jack.
Transmit data shield on the RJ-45 (pin 3) jack is always connected to
the shield of the RJ-45 jack.
4
RJ-45 Jack
Pin No./Signal
1 - Transmit Data
2 - Transmit Data
3 - Transmit Data Shield
4 - Receive Data
5 - Receive Data
6 - Receive Data Shield
7 - no connection
8 - no connection
Figure 1. RJ-45 Pin Connections
3.0 CONFIGURATION
The following section describes configuring the Model 465 Series.
The Model 465 Series is preset to work in most applications without
additional configuration. The only user-configurable parameters are the
shield connections between the 75 Ohm coax and 120 Ohm interfaces.
The shields are connected between the modular jack and dual
1.6/5.6 connectors (see Appendix B). The shield on the RJ-45 jack
always connects to the transmit data shield (pin 3). RJ-45 (pin 3)
connects to the coax transmit shield via JP1. RJ-45 (pin 6) connects to
the coax receive shield via JP2. Remove the jumpers to break the
connection.
The factory setting leaves both jumpers JP1 and JP2 (see Table 1
above) in place, passing both shield connections through. To break one
or both of the shield connections, follow the instructions below.
1)
Insert a flat blade screwdriver into the slot on the side of
the 465 Series case and twist. The case will pop
open, exposing the PC board.
2)
Holding the PC board with the RJ-45 jack facing left,
locate jumper JP1 toward the top of the board and JP2
toward the bottom of the board. Remove the desired
jumper(s) to break one or both shield connections.
NOTE: Do not lose the jumper(s).
3)
Re-align the case halves and end inserts and snap the case
halves back together.
3
Table 1. Jumper settings
RJ-45 (120 ohm)
Jumper
Coax 1.6/5.6 mm. (75 ohm)
Pin 3 (TX Shield)
JP1
TX Out Coax Shield
Pin 6 (RX Shield)
JP2
RX In Coax Shield
Summary of Contents for 465F
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