USER
MANUAL
MODEL 460RC
Rack-Mounted G.703 Coax to
Twisted Pair
Adapters (BALUNs)
SALES OFFICE
(301) 975-1000
TECHNICAL SUPPORT
(301) 975-1007
Part # 07M460RC-A
Doc. #019081UA
Revised 3/13/98
An ISO-9001
Certified Company
3.0 CONFIGURATION
3.1.1 Jumper Straps JP1, JP2, JP3, JP4, and JP7
Each Model 460RC/F Module is equipped with four jumpers that
you may use to configure several grounding options. This section
shows the jumper locations and describes their functions.
The jumper straps allow you to set shielding and grounding options
for the Model 460RC/F. The settings for each jumper strap are shown
briefly in the table below. Following this table are more detailed
explanations of each jumper.
3.1 SETTING THE JUMPER STRAPS
INTERFACE CARD STRAP SUMMARY TABLE #1
There are five configuration jumpers on the back side of the Model
460RC/F printed circuit board. These jumpers are labeled below and
on the PC board as “JP1”, “JP2”, “JP3”, “JP4”, and “JP7”. Figure 1,
below, shows their positions on the pc board as well as the relative pin
numbers on the jumpers.
Strap
Function
Position 1&2 Position 2&3
JP1
Coax TX Shield & RJ45 Pin 3
Open*
Connected
Open
JP2 Coax TX Shield & RJ-45 Shield
JP3 Coax RX Shield & RJ-45 Shield
Connected*
Connected*
Open*
Open
JP4
Coax RX Shield & RJ-45 Pin 6
Connected
Open
JP7 RJ-45 Shield & Chassis Ground
Connected*
1
2
3
* Indicates default setting
JP3
JP4
1
2
3
Jumper JP1: 75 Ohm TX Shield to 120 Ohm TX Pair Shield (Pin 3)
1
2
3
JP2
JP1
In the default “Connected” setting, the 75 Ohm transmit out coaxial
shield connects to RJ-45 pin 3, the transmit pair shield.
1
2
3
JP7
JP1
Setting
Description
1
2
3
Position 1 & 2
Not Connected
75 Ohm TX shield not
connected to RJ-45 TX
pair shield (Pin 3).
Figure 1. Individual Model 460RC/F Card
Position 2 & 3
Connected
75 Ohm TX shield
connected to RJ-45 TX
pair shield (Pin 3).
Figure 2 (below) shows the orientation of the rear interface card
straps. Observe that the strap can either be on posts 1 and 2, or on
posts 2 and 3.
Jumper JP2: 75 Ohm Shield to 120 Ohm Overall Shield
In the default “Connected” setting, the 75 Ohm transmit out coaxial
shield connects to the RJ-45 overall foil shield.
JP2
Setting
Description
Position 1 & 2
Connected
75 Ohm TX shield
connected to the RJ-45
overall foil shield.
Figure 2. Possible Positions for Model 460RC/F Jumpers
Position 2 & 3
Not Connected
75 Ohm TX shield not
connected to the RJ-45
overall foil shield.
4.0 INSTALLATION
Jumper JP3: 75 Ohm RX Shield to 120 Ohm Overall Shield
This section describes the functions of the Model 460RC16 rack
chassis, tells how to install front and rear Model 460RC/F Series cards
into the chassis, and how to connect to the twisted pair interface and
the serial interface.
In the default “Connected” setting, the 75 Ohm receive in coaxial
shield connects to RJ-45 pin 6, the receive pair shield.
JP3
Setting
Description
Position 1 & 2
Connected
75 Ohm RX shield
connected to the RJ-45
overall foil shield
4.1 THE MODEL 460R16 RACK CHASSIS
The Model 460R16 Rack Chassis (Figure 3, below) can
accomodate up to 16 G.703 75 Ohm coax to 120 Ohm RJ-45 baluns.
Measuring only 3.5” high, the Model 460R16 is designed to occupy only
2U in a 19” rack. Sturdy front handles allow the Model 460R16 to be
extracted and transported conveniently.
Position 2 & 3
Not Connected
75 Ohm RX shield not
connected to the RJ-45
overall foil shield
Jumper JP4: 75 Ohm RX Shield to 120 Ohm Rx Pair Shield (Pin 6)
In the default “Connected” setting, the 75 Ohm coaxial shield
connects to the RJ-45 overall foil shield.
JP4
Setting
Description
Position 1 & 2
Not Connected
75 Ohm RX shield not
connected to the RJ-45
RX pair shield (Pin 6)
Figure 3. Fully Populated Model 460RC16 Rack Chassis
Position 2 & 3
Connected
75 Ohm RX shield
connected to the RJ-45
RX pair shield (Pin 6)
4.2 INSTALLING THE MODEL 460RC/F MODULE INTO THE
CHASSIS
The Model 460RC16 comprised of a 2U high rack chassis and
individually mountable G.703 balun modules. You may purchase a fully
populated 16 port rack or you may purchase individual modules. Refer
to Figure 4 as a guide and follow the steps below to install each Model
additional 460RC/F module into the rack chassis:
Jumper JP7: RJ-45 Shield to Chassis Ground
In the default “Connected” setting, the RJ-45 overall shield
connects to chassis ground.
1. Slide the two star washers over the screws on each end of the
mount space.
JP7
Position 1 & 2
Setting
Connected
Description
RJ-45 shield connects
to Frame Ground.
2. Slide the Model 460RC/F pc board over the screws with the
BNC connectors facing downward. Then push the BNC
connectors and RJ-45 connector through the matching slots in
the front of the rack assembly.
Position 2 & 3
Not Connected
RJ-45 shield does not
connect to Frame
Ground.
3. Slide a plastic spacer over each screw to secure the pc board.
4. Install the lexan shield over the spacers.
4.4 CONNECTING THE 120 OHM RJ-45 PORTS
The pin configuration of the 120 Ohm twisted pair port is shown
below:
Star Washer (behind
460RC/F Module)
RJ-45 Pin(s)
Function
1 ................................TX Output
2 ................................TX Output
3 ................................TX Shield
4 ................................RX Input
5 ................................RX Input
6 ................................RX shield
7 ................................no connection
8 ................................no connection
Spacer
Simply install the twisted pair wires by making the following
connections.
Lexan Shield
Lock Washer
460RC/F Modules
Hex Nut
G.703
Model 460RC/F
Instrument
TX Output
TX Output
RJ-45 Pin No.
Figure 4. Mounting a Model 460RC/F Module to the Rack
4
5
5. Secure the 460RC/F card assembly by connecting a lock
washer and hex nut on each screw.
TX Shield
3
RX Input
RX Input
1
2
4.3 CONNECTING THE 75 OHM BNC PORTS
RX Shield
6
The 75 Ohm BNC ports on the front of the 460R16 are labeled
“TX” (Transmit Data Output) and “RX” (Receive Data Input). Simply
connect the G.703 lines as follows*:
*NOTE: The total allowable cable lengths are subject to the
constraints of the ITU/CCITT G.703 recommendation. However,
we recommend a total patch cable length, including coaxial and
twisted pair cabling, of no more than 320 feet (200m).
G.703 Network
Model 460RC/F
BNC Connector
BNC Connectors
TX
RX
RX
TX
*NOTE: The total allowable cable lengths are subject to the
constraints of the ITU/CCITT G.703 recommendation. However,
we recommend a total patch cable length, including coaxial and
twisted pair cabling, of no more than 320 feet (200m).
APPENDIX A
APPENDIX B
PATTON ELECTRONICS MODEL 460RC
SPECIFICATIONS
PATTON ELECTRONICS MODEL 460RC
FACTORY REPLACEMENT PARTS
AND ACCESSORIES
Transmission Line:
CCITT G.703 (unstructured)
2.048 Mbps
Model #
Description
Data Rate:
460R16 ......................Empty Balun Rack Panel
460RC/F ....................G.703 Balun Rack Module
05R16S460RC...........Lexan Shield
056345.......................Star Washer
75 Ohm Connection:
Dual coax BNC connectors, male or
female (RG 59 or 2002 coax)
0562-06......................Spacer
0561LW......................Lock Washer
055.............................Hex Nut
120 Ohm Connection:
Power Supply:
Shielded RJ-45 jack
none required
07M460RC.................Model 460RC User Manual
Link-to-Data Isolation:
Temperature Range:
500 volts AC/DC
32-122°F (0-50°C)
Dimensions (w/o handles): 19" Wide x 3.5" High x 1.9” Deep
(48.3 x 8.9 x 4.8 cm)
APPENDIX C
APPENDIX D
PATTON ELECTRONICS MODEL 460RC/F
PIN ASSIGNMENTS
PATTON ELECTRONICS MODEL 460RC/F
BLOCK DIAGRAM
120 OHM TWISTED PAIR INTERFACE
RJ-45 Jack
Pin No./Signal
1 - Transmit Data Out
2 - Transmit Data Out
3 - Transmit Data Shield
4 - Receive Data In
5 - Receive Data In
6 - Receive Data Shield
7 - no connection
8 - no connection
© Copyright 1998
Patton Electronics Company
All Rights Reserved
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