Patton 1012ARC, Asynchronous User Manual

Dear Valued Customer,

Thank you for purchasing Patton Electronics products! We do

appreciate your business. I trust that you find this user manual helpful.

We manufacture one of the widest selections of data
communications products in the world including CSU/DSU's, network
termination units, powered and self-powered short range modems, fiber optic
modems, interface converters, baluns, electronic data switches, data-line surge
protectors, multiplexers, transceivers, hubs, print servers and much more. We
produce these products at our Gaithersburg, MD, USA, facility, and can
custom manufacture products for your unique needs.

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Web: http://www.patton.com

Sales E-mail: [e-mail]

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Phone - Support [phone]

Fax: [phone]

Mail: Patton Electronics Company

7622 Rickenbacker Drive
Gaithersburg, MD 20879 USA

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Electronics is BABT and ISO 9001 certified. We meet and exceed the highest
standards in the industry (CE, UL, etc.).

It is our business to serve you. If you are not satisfied with any
aspect of this product or the service provided from Patton Electronics or its
distributors, please let us know.

USER
MANUAL

MODEL 1012ARC

Asynchronous,
Two-Channel
Short Range Modem
Rack Card

Thank you.

Burton A.Patton
Vice President

P.S. Please tell us where you purchased this product:
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CERTIFIED

An ISO-9001

Certified Company

Part #07M1012ARC-C
Doc #040041UC
Revised 9/10/97

SALES OFFICE
[phone]
TECHNICAL SUPPORT
[phone]

1.0 WARRANTY INFORMATION

Patton Electronics warrants all Model 1012ARC 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.

1.1 RADIO AND TV INTERFERENCE

The Model 1012ARC generates and uses radio frequency energy,
and if not installed and used properly—that is, in strict accordance with
the manufacturer’s instructions—may cause interference to radio and
television reception. The Model 1012ARC has been tested and found
to comply with the limits for a Class A computing device in accordance
with the specifications in Subpart J of Part 15 of FCC rules, which are
designed to provide reasonable protection from such interference in a
commercial installation. However, there is no guarantee that
interference will not occur in a particular installation. If the Model
1012ARC does cause interference to radio or television reception,
which can be determined by disconnecting the unit, the user is
encouraged to try to correct the interference by one or more of the
following measures: moving the computing equipment away from the
receiver, re-orienting the receiving antenna and/or plugging the
receiving equipment into a different AC outlet (such that the computing
equipment and receiver are on different branches). In the event the
user detects intermittent or continuous product malfunction due to
nearby high power transmitting radio frequency equipment, the user is
strongly advised to take the following steps: use only data cables with
an external outer shield bonded to a metal or metalized connector; and,
configure the rear card as shown in section 3.3 of this manual.

1.3 SERVICE

All warranty and nonwarranty 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 Support: [phone]; http://www.patton.com; or,
[e-mail]. Notice: 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 1012ARC. Technical Service hours: 8AM to 5PM EST,

Monday through Friday.

1.2 CE NOTICE

The CE symbol on your Patton Electronics equipment indicates
that it is in compliance with the Electromagnetic Compatibility (EMC)
directive and the Low Voltage Directive (LVD) of the Union European
(EU). A Certificate of Compliance is available by contacting Technical
Support.

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2.0 GENERAL INFORMATION

3.0 CONFIGURATION

Thank you for your purchase of this Patton Electronics product.
This product has been thoroughly inspected and tested and is
warranted for One Year parts and labor. If any questions or problems
arise during installation or use of this product, please do not hesitate to
contact Patton Electronics Technical Support at [phone].

2.1 FEATURES

• Houses two short range modems

• Full or half duplex

• Asynchronous data rates to 38.4 Kbps

• Point-to-point or multipoint

• Automatic equalization and gain control

• Software and hardware handshaking

• Distances to 6 miles over two unconditioned twisted pair

• Transformer isolation

• Silicon Avalanche Diode surge protection

• Mounts in Patton’s rack chassis

• Made in USA

2.2 DESCRIPTION

The Patton Model 1012ARC is a miniature rack card designed to

house two asynchronous short range modems. Operating full or half
duplex at data rates to 38.4 Kbps, the Model 1012ARC supports point­to-point or multidrop applications and offers automatic equalization and
gain control. The Model 1012ARC supports distances up to 6 miles
over two twisted pair. Built-in transformer isolation and surge
protection provide protection against ground potential differences and
AC/DC over-voltages, making the Model 1012ARC ideal for
connections between two buildings.

The Model 1012ARC is designed to mount in Patton’s Model
1000R16P rack chassis. This 16-card chassis has a switchable
120/240 volt power supply and uses mid-plane architecture: The front
card can be plugged into different rear cards. This means that the
1012ARC can have several interface options, and can be switched with
other Patton short haul cards. The rear card is available with an RJ-45
connection for each RS-232 channel and either RJ-11 or RJ-45
connections for twisted pair.

The Model 1012ARC rack card is easy to set up since there are
only two configuration straps. Figure 1 (below) shows the location of
these straps on the Model 1012ARC PC board.

RTS Channel A

RTS Channel B

Figure 1. Model 1012ARC, showing straps locations

3.1 MOVING THE CONFIGURATION STRAPS

Figure 2 shows how to move the configuration straps. Note that the
Model 1012ARC only has two pegs, thus the straps can only be
“installed” or “removed”. The rear card uses three pegs, and can be on
either pegs 1 and 2, or pegs 2 and 3.

123 123 123

Figure 2. Orientation of interface card straps

3.2 SETTING THE RTS/DCD STRAPS

Each RTS/DCD strap affects one of your modems. Their setting
determines how the respective transmitters (i.e., carrier) are activated.
When these straps are installed, the Model 1012ARC transmitter is
CONTROLLED CARRIER. When these straps are removed, the
transmitter is CONSTANT CARRIER. Each strap may be configured
separately.

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