Patton 3002 User Manual

USER
MANUAL

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

MODEL 3002

RS-232 Tail Circuit
Buffer

An ISO-9001

Certified Company

Part #07M3002-A
Doc. #011021U
Rev. B
Revised 1/22/08

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1.0 WARRANTY INFORMATION

Patton Electronics warrants all Model 3002 components to be

free from defects, and will—at our option—repair or replace the
products should they 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 these products fail or do 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 these products. 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 3002 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 3002 has been tested and found to
comply with the limits for Class A computing devices 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 3002 does
cause interference to radio or television receivers, which can be
determined by disconnecting the RS-232 interfaces, the user is
encouraged to try one or more of the following measures: move the
computing equipment away from the receiver, re-orient the receiving
antenna and/or plug the receiving equipment into a different AC outlet
(such that the computing equipment and receiver are on different
branches).

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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1.3 SERVICE

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 Support: [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 3002. Technical Support hours: 8AM to 5PM EST, Monday

through Friday.

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2.0 GENERAL INFORMATION

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

• Provides DCE to DCE connection

• Two internal 64-bit buffers

• Synchronous data rates up to 64kbps

• No AC power required

• External configuration switches

• Ultra-miniature size

• Made in the USA

2.2 DESCRIPTION

The Patton Model 3002 Tail Circuit Buffer is a cost-effective

solution for the interconnection of two modem type devices that are
required to be connected in a tail ciruit configuration. Data is buffered
and re-clocked in both directions to insure data integrity when using two
modems that must be clocked independent of each other. The Model
3002 allows the user to connect a tail circuit to a DCE type device.
Modems, sharing devices or multiplexers that will not normally
accommodate a DCE type device, can have a tail-ciruit attached to a
sub-channel port through use of this device.

Clock phasing differences are compensated for by buffering the
data coming from the tail circuit into a 64 bit centered buffer. This gives
32 bits of clock slippage in both the positive and negative direcitons.

The 3002 can monitor the DCD interface lead from each of the
modem devices and optionally use the DCD signal (pin8) to recenter
the buffers to prevent the buffers from filling up during periods of
inactivity. Clocking rates up to 64kbps are possible while using the

3002. The unit is totally transparent to your data. For easy
configuration, the Model 3002 features a convenient set of external
configuration switches. These switches allow the user to control buffer
centering by enabling or disabling the carrier detect option.

Housed in an ultra-miniature ABS plastic case, the Model 3002
comes equipped with two DB-25 female connectors.

Synchronous operation in both Half Duplex and Full Duplex
operation is fully supported. Carrier Detect signaling can be used to re­center the ring buffers. All cabling crossover is done in the Model 3002,
allowing utilization of standard “Straight Through” cables for all
interconnections.

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