Patton electronic 460 User Manual

USER
MANUAL

MODEL 460 Series

G.703 Coax to Twisted Pair
Adapter (Balun)

SALES OFFICE
[phone]
TECHNICAL SUPPORT
[phone]
http://www.patton.com

Part #07M460-E
Doc. #019021UE
Revised 02/23/00

An ISO-9001

Certified Company

1

WARRANTY

Patton Electronics warrants all Model 460 components to be free

from defects, and will—at our option—repair or replace the product
should it fail 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 fails 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
following: lost profits, lost savings 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.

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 [phone]; http://www.patton.com: or,
[e-mail]. 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: 8AM to

5PM EST, Monday through Friday.

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.

PRODUCT DESCRIPTION

The Patton Model 460 Series allow 75 Ohm coax hardware to

communicate with 120 Ohm twisted pair equipment. The Model 460
Series specifically address the ONP requirement that European PTTs
offer 120 Ohm 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 present a ready solution to this termination mismatch by
allowing a bi-directional conversion of coax (75 Ohm) to a twisted pair
(120 Ohm ), supporting data rates to E1 (2.048 Mbps). The signals

2

output by them are scaled to match the pulse shape requirements
specified by the CCITT G.703 standard.

The Model 460s come in the following versions (see below):

460

· A shielded RJ-45 jack.

· 460M:Two male coaxial connectors (i.e., center conductor is

a pin).

· 460F:Two female coaxial connectors (i.e., center conductor is
a receptacle).

460-TBP

· A 4-position terminal block.

· 460M-TBP:Two male coaxial connectors (i.e., center

conductor is a pin).

· 460F-TBP:Two female coaxial connectors (i.e., center
conductor is a receptacle).

460MC

· Two male coaxial connectors at the end of a coax pigtail

cable. (i.e., center conductor is a pin).See photo on front
cover of manual.

TX Out connector

Gaithersburg, Maryland

Model 460F-TBP

G.703 Balun

S/N:9912130009 Lot: 00774

RX In TX Out

Terminal block

RCV

XMT

RX In TX Out

G.703 Balun

S/N:9912130009 Lot: 00774

Model 460F-TBP

Gaithersburg, Maryland

Rx In connector

Gaithersburg, Maryland

Model 460

G.703 Balun

S/N:9912130035 Lot: 00784

RX In TX Out

Model 460-TBP

RJ-45 connector

Model 460

RX In TX Out

G.703 Balun

S/N:9912130009 Lot: 00774

Model 460F-TBP

Gaithersburg, Maryland

TX Out connector

Rx In connector

3

RJ-45 Jack and Terminal Block Descriptions

Shielded RJ-45 Jack:

· Pins 1 and 2 are the balanced inputs. The balanced signals

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 RJ­45 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 460M has male coaxial connectors (i.e., center

conductor is a pin) and the 460F has female coaxial
connectors (i.e., center conductor is a receptacle).

4

CONFIGURATION

NOTE: The Model 460-TBP does not require configuration; go to

section “INSTALLATION” on page 2. The following section
describes configuring the Model 460. The Model 460 Series are pre-set
to work in most applications without additional configuration. The only
parameter that is user-configurable is the shield connection between
the 75 Ohm coax and 120 Ohm interfaces. The diagram on the
following page shows how the shield is connected between the modular
jack and dual BNCs. Removing the jumper breaks the connection.

The Model 460 is most often used to bi-directionaly 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

The factory setting leaves both jumpers JP1 and JP2 (see figure
above) in place, thus passing both shield connections through. To break
one or both of the shield connections, follow the instructions on the next
page.

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 PC board.

2) Holding the PC board with the modular 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.

Twisted
Pair
Equip­ment

TX Out connector

RJ-45 connector

RX In TX Out

G.703 Balun

S/N:9912130009 Lot: 00774

Model 460F-TBP

Gaithersburg, Maryland

Shielded RJ-45 Jack

1
2

NetworkNetworkNetwork

3
4
5
6
7

NetworkNetworkNetwork

8

Twisted-

pair

CPE

Pair 1

XMTRCV
XMTRCV

TX Shield

RCVXMT

XMT RCV

RX Shield

Pair 2

Rx In connector

GND

Signal

JP1

Signal

GND

TX Out

RX In

JP2

5

INSTALLATION

The sections on the next page describe installing the following:

· Model 460

· Model 460-TBP

Refer to the appropriate section on the following page to install

your unit.

Installing the Model 460
Do the following:

1) Refer to the pin configuration below when assembling the
cable that will connect to 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

2) Plug the modular cable connector into the RJ-45 jack.

3) Connect the coaxial cables to the TX Out and RX In
connectors. Congratulations, you have finished installing the
Model 460!

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 .25 inches.

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 at upper right.

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.

6

PATTON MODEL 460 SERIES SPECIFICATIONS

Transmission Line: ITU/CCITT G.703 (unstructured)
Data Rate: 2.048 Mbps maximum

Unbalanced Coaxial
Connection: Dual coax BNC connectors, male or female

(RG 59 or 2002 coax) and Nominal Line

Impedance = 75 Ohms

Balanced Twisted Pair
Connection: Single 8-pin RJ-45 jack, shielded (two

twisted-pair), Nominal Line Impedance =
120 Ohms and 4-position, removable
terminal block

Power Supply: None required, passive device
Operating Temperature: 0-50° Celcius (32-122° Fahrenheit)
Coaxial Twisted Pair

Isolation: 1500V rms
Compliance: CE approved
Dimensions: 0.8H x 1.7W x 2.7D in. (6.86H x 4.32W x

2.03D cm.)

Equipment

Coax
Equip­ment

Twisted
Pair
Equip­ment

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

CPE

XMT

RCV

Pair 2

RCV
XMT

RX In

Twisted-pair

Coax

CPE