Patton electronics 1020, 1020S User Manual

USER
MANUAL

MODEL 1020
and 1020S

Synchronous Short
Range Modem with
Transformer Isolation

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

Part #07M1020-C
Doc. #041011UC
Revised 4/20/98

CERTIFIED

An ISO-9001

Certified Company

1.0 WARRANTY INFORMATION

Patton Electronics warrants all Model 1020 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 1020 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 1020 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 1020
does cause interference to radio or television reception, which can be
determined by disconnecting the RS-232 interface, 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).

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
Services.

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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 Services at:

telephone: [phone]

email: [e-mail]

web address: http://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
Patton Model 1020. Technical Service 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

• Supports point-to-point data rates from 1.2 to 19.2 Kbps

• Internal, crystal controlled clock

• Transformer isolation guards against ground looping

• Range to 11 miles

• Full duplex operation

• Custom VLSI chip with separate filter for each data rate

• No AC power or batteries required

• Miniature size

• High speed surge protection (Model 1020S only)

2.2 DESCRIPTION

The Patton Electronics Model 1020 miniature, synchronous short

range modem uses the latest in VLSI technology to combine high­quality data transmission with compact size. The Model 1020 does not
require any AC power or batteries to operate, and communicates up to
11 miles in point-to-point environments.

Supporting full duplex transmission over two twisted pairs, the
Model 1020 has a crystal controlled internal clock. Data rates are
switch selectable from 1200 to 19,200 bps. The Model 1020’s custom
VLSI chip uses a separate filter for each data rate, rather than a single
“compromise” filter. Transformer isolation allows the Model 1020 to
operate between buildings without data disruption due to ground
potential differences.

The Model 1020S is a surge protected version of the Model 1020,
incorporating Silicon Avalanche Diodes that provide 600 watts of
protection per wire.

3.0 CONFIGURATION

The Model 1020 provides four configuration switches which allow
selection of RTS/CTS delay and data rates. This section describes
switch locations and explains all possible switch configurations.

3.1 SWITCH LOCATIONS

For your convenience, all configuration switches are located on a
SIP (single in-line package) mounted on the PC board. Figure 1 shows
the location of the SIP with respect to other PC board components. For
instructions on opening the Model 1020 case, see Section 4.1.2.

Figure 2 shows the orientation of the configuration switches,

including the ON/OFF position.

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PATTO N

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1 234

ON

OFF

Figure 1. Model 1020 PC board showing switches

Figure 2. Close-up of configuration switches

Control

Switches

Terminal Block

Patton

VLSI chip

Isolating

Transformers