USER
MANUAL
MODEL 460 SERIES
G.703 Coax to T wisted
Pair Adapter (Balun)
An ISO-9001
Certified Company
Part# 07M460
Doc# 019021U Rev. G
Revised 9/15/04
SALES OFFICE
(301) 975-1000
TECHNICAL SUPPORT
(301) 975-1007
CONTENTS
1.0 Warranty Information ................................................................. 3
1.1 Service and Support..................................................................... 3
1.2 CE Notice...................................................................................... 3
2.0 Product Description ................................................................... 4
2.1 RJ-45 Jack and Terminal Block Descriptions............................... 5
3.0 Configuration .............................................................................. 6
4.0 Installation................................................................................... 8
4.1 Installing the Model 460................................................................ 8
4.2 Installing the Model 460-TBP........................................................ 8
A Specifications ........................................................................... 10
A.1 Transmission Line ....................................................................... 10
A.2 Data Rate .................................................................................... 10
A.3 Unbalanced Coaxial Connection ................................................ 10
A.4 Balanced Twisted Pair Connection ............................................. 10
A.5 Power Supply .............................................................................. 10
A.6 Operating Temperature .............................................................. 10
A.7 Coaxial Twisted Pair Isolation ..................................................... 10
A.8 Compliance ................................................................................. 10
A.9 Dimensions ................................................................................. 10
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1.0 WARRANTY INFORMATION
Patton Electronics
warrants all Model 460 components to be free from
defects, and will—at our option—repair or replace the product should it f ail
within one year from the first date of shipment. This warranty is limited to
defects in workmanship or materials, and does not cover customer damage ,
abuse or unauthorized modification. If this product f ails or does not perform
as warranted, your sole recourse shall be repair or replacement as
described above. Under no condition shall
Patton Electronics
be liable for
any damages incurred by the use of this product. These damages include,
but are not limited to, the f ollo wing: lost profits , lost sa vings and incidental or
consequential damages arising from the use of or inability to use this product.
Patton Electronics
specifically disclaims all other warranties,
expressed or implied, and the installation or use of this product shall be
deemed an acceptance of these terms by the user.
1.1 SERVICE AND SUPPORT
All warranty and non-warranty repairs must be returned freight prepaid
and insured to Patton Electronics. All returns must have a Return Materials Authorization number on the outside of the shipping container. This
number may be obtained from Patton Electronics Technical Service at
(301) 975-1007; www.patton.com
Note
Packages received without an RMA number will not be
accepted. Patton Electronics' technical staff is also available to
answer any questions that might arise concerning the installation or use of your Model 460. Technical Service hours:
5 pm EST (1300
to
; or
2200 UTC
support@patton.com
), Monday through Friday.
.
8 am
to
1.2 CE NOTICE
The CE symbol on your Patton Electronics equipment indicates that it is
in compliance with the Electromagnetic Compatibility (EMC) directive of
the European Union (EU). A Certificate of Compliance is available by
contacting Patton Technical Support.
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2.0 PRODUCT DESCRIPTION
The
Patton Model 460 Series
municate with 120-ohm twisted-pair equipment. The Model 460 Series
specifically address the ONP requirement that European PTTs offer 120ohm twisted-pair terminations to their customers. Some PTTs and private carriers are standardized on 75-ohm coax, or have customers
whose CPE has only 75-ohm coax connections. The Model 460 Series
provide a ready solution to this termination mismatch by allowing a bidirectional conversion of coax (75 ohm) to a twisted-pair (120-ohm), supporting data rates to E1 (2.048 Mbps). The signals output by them are
scaled to match the pulse shape requirements specified by the CCITT
G.703 standard.
The Model 460 is available in the following versions:
• 460F
– A shielded RJ-45 jack.
– Two female coaxial connectors
• 460M
– A shielded RJ-45 jack.
– Two male coaxial connectors
enables 75-ohm coax hardware to com-
• 460F-TBP
– A 4-position terminal block.
– Two female coaxial connectors
• 460M-TBP
– A 4-position terminal block.
– Two male coaxial connectors
• 460MC
– A shielded RJ-45 jack.
– Two 6-in. coaxial cables with male connectors
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Figure 1.
Model 460 functional diagram
2.1 RJ-45 JACK AND TERMINAL BLOCK DESCRIPTIONS
Shielded RJ-45 Jack:
• Pins 1 and 2 (see Figure 1) are the balanced inputs. The balanced sig-
nals are converted to an unbalanced signal on the center conductor of
the TX Out coax connector.
• The unbalanced signal from the RX In coax connector is converted to
balanced signals on pins of the RJ-45.
• The shield of the RX In connector may be connected to RJ-45 pin 6 by
jumper JP2 (on).
• The shield of the TX Out connector is always connected to the shield
around the RJ-45 connector. This connection may also be connected
to RJ-45 pin 3 via JP1 (on).
Terminal Block:
• Has a 4 pin terminal block for a twisted pair connection.
• The 460-TBP has coaxial connectors.
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3.0 CONFIGURATION
Note
If you have a Model 460-TBP, it does not require configuration;
refer to section 4.0, “Installation” on page 8.
The following section describes configuring the Model 460. The Model 460
Series are preset to work in most applications without additional configuration.
The only parameter that is user-configurable is whether there is a shield connection between the 75-ohm coax and 120-ohm interfaces. Figure 1 on
page 5 shows how the shield is connected between the modular jack and dual
BNCs. Removing the jumper breaks the shield connection.
The Model 460 is most often used to bi-directionally convert CPE
twisted-pair terminations to CPE coaxial terminations.
RJ-45 (120 ohm) Jumper Coax BNC (75 ohm)
Pin 3 (TX Shield) JP1 TX Out Shield
Pin 6 (RX Shield) JP2 RX In Shield
JP2
JP1
Figure 2.
JP1 and JP2 locations for 460F and 460MC
The factory setting leaves jumpers JP1 and JP2 (see Figure 2 above and
Figure 3 on page 7) in place, thus passing both shield connections
through. To change one or both of the shield connections, do the following:
1. Insert a flat-blade screwdriver into the slot on the side of the Model
460 case and twist. The case will pop open, exposing the printed circuit board.
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JP2
JP1
Figure 3.
JP1 and JP2 locations for 460M
2. Using Figure 2 as a reference, remove the desired jumper(s) to
break one or both shield connections.
Note
Do not lose the jumper(s).
3. Align the case halves and end inserts and snap the case halves
back together.
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4.0 INSTALLATION
The sections on the next page describe installing the following:
• Model 460 (see section 4.1, “Installing the Model 460” on page 8)
• Model 460-TBP (see section 4.2, “Installing the Model 460-TBP” on
page 8)
Refer to the appropriate section to install your unit.
4.1 INSTALLING THE MODEL 460
Do the following:
1. Refer to the pin configuration below when assemb ling the cab le that
will connect to the RJ-45 jack.
2. Plug the modular cable connector into the RJ-45 jack.
RJ-45 Pin(s) Function
1 and 2 TX pair
3 TX shield
4 and 5 RX pair
6 RX shield
3. Connect the coaxial cables to the TX Out and RX In connectors.
Congratulations, you have finished installing the Model 460!
4.2 INSTALLING THE MODEL 460-TBP
Do the following:
1. Strip the outer jacket insulation from the twisted pairs about 1 inch.
2. Strip back the insulation on each of the wires about 0.25 inches.
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RCV
XMT
Clamp
screws
(4 places)
Terminal block
XMT RCV
CPE
Model 460F-TBP
RCV
XMT
Gaithersburg, Maryland
RX In TX Out
G.703 Balun
S/N:9912130009 Lot: 00774
TX Out
Pair 1
XMT
Twisted-pair
CPE
RCV
Pair 2
Figure 4.
Model 460-TBP terminal block interface wiring diagram
RCV
XMT
RX In
3. Connect one pair of wires to the two XMT (transmit) positions on the
terminal block. The Model 460-TBP is not polarity sensitive so either
wire may connect to either pole. See Figure 4.
4. Connect the other pair of wires to the two RCV (receive) positions
on the terminal block.
5. Connect the coaxial cables to the TX Out and RX In connectors.
Coax
CPE
Congratulations, you have finished installing the Model 460-TBP!
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APPENDIX A
SPECIFICATIONS
A.1 TRANSMISSION LINE
ITU/CCITT G.703 (unstructured)
A.2 DATA RATE
2.048 Mbps maximum
A.3 UNBALANCED COAXIAL CONNECTION
• Dual coax female BNC connectors (RG 59 or 2002 coax)
• Nominal line impedance: 75 ohms
A.4 BALANCED TWISTED PAIR CONNECTION
• Single 8-pin RJ-45 jack, shielded (two twisted-pair)
• Nominal line impedance: 120 ohms
• 4-position, removable terminal block
A.5 POWER SUPPLY
None required, passive device
A.6 OPERATING TEMPERATURE
32–122°F (0–50°C)
A.7 COAXIAL TWISTED PAIR ISOLATION
1500 Vrms
A.8 COMPLIANCE
CE approved
A.9 DIMENSIONS
0.8H x 1.7W x 2.7D in. (6.86H x 4.32W x 2.03D cm.)
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Notes
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Notes
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Copyright © 2001, 2004
Patton Electronics Company
All Rights Reserved.
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