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USER
MANUAL
MODEL 2010
Asynchronous to
Synchronous
Converter
SALES OFFICE
(301) 975-1000
TECHNICAL SUPPORT
(301) 975-1007
http://www.patton.com
Part# 07M2010-A
Doc# 062031UA
Revised 03/21/94
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1.0 WARRANTY INFORMATION
Patton Electronics warrants all Model 2010 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 2010 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 2010 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 2010
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 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 Service at (301) 975-1007.
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 2010. 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 (301) 975-1007.
2.1 FEATURES
• Conforms to CCITT V.14 and V.22 standards
• Adapts asynchronous terminals to synchronous modems and
multiplexers
• Allows character lengths from 8 - 11 bits
• Requires no AC power or batteries
• Data rates to 19.2 Kbps
• Automatically adjusts synchronous data rates
• Miniature size
• Accepts external clocking
• Made in the USA
2.2 DESCRIPTION
The Model 2010 converter gives asynchronous hardware access to
the high speed capabilities of synchronous modems or multiplexers.
The Model 2010 plugs directly into the asynchronous RS-232 DTE port
and connects via RS-232 cable to the synchronous DCE device.
Drawing power from the RS-232 interface, the Model 2010 needs
no AC power or batteries to operate and supports data rates to 19.2
Kbps. Because the Model 2010 automatically adjusts the synchronous
data rate to match the asynchronous DTE’s output rate, no data rate
strapping is necessary. The Model 2010 derives clocking externally
from the clock of the synchronous DCE, and imposes no limit on data
block size. Characters may be up to 11 bits long.
Measuring only 3.2” x 2.0” x .75”, the Model 2010 is housed in a
sturdy ABS plastic case. It comes fully equipped with a DB-25 male
connector and a DB-25 female connector.
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3.0 CONFIGURATION
The Model 2010 is configured using four internal switches. Figure
1 shows the switch locations with respect to other PC board
components.
3.1 SETTING INTERNAL SWITCHES
The four switches shown in Figure 2 allow selection of character
length and extended signalling rate. These switches are located
internally on the Model 2010’s PC board. To access them, use a small
flathead screwdriver to pop open the Model 2010’s case as shown in
Figure 3.
3.2 SWITCH SETTINGS
All possible settings for the Model 2010’s configuration switches
are presented in the following summary table and descriptions. If you
have additional questions regarding configuration, contact Patton
Technical Support at (301) 975-1007.
Switches SW1-1 and SW1-2: Character Length
Switches SW1-1 and SW1-2 are set in combination to determine
the character length for asynchronous data.
SW 1-1
SW 1-2
Off On 8 bit
On On 9 bit
Off Off 10 bit
On Off 11 bit
4
Configuration
Switches
Async. Female Connector
Sync. Male Connector
3
OFF
ON
OFF
OFF
ON
ON
ON
OFF
Figure 1. Switch locations on the 2010 PC board
Figure 3. Opening the Model 2010’s case with a small screwdriver
Figure 2. Close-up of the Model 2010’s configuration switches
SWITCH SUMMARY TABLE
Position Function Factory Default
Switch 1-1 Character Length Off
Switch 1-2 Character Length Off
Switch 1-3 Signalling Rate Off
-2.5% to +1%
Switch 1-4 Not Used
10 bit
}
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Switch SW1-3: Extended Signalling Rate (ESR)
The setting for switch 1-3 determines the range of variability the
Model 2010 looks for in asynchronous data rates (i.e., the actual
variance from a given frequency level the Model 2010 will tolerate).
SW 1-3
Off -2.5% to +1%
On -2.5% to +2.3%
Switch SW1-4: Not Used
4.0 INSTALLATION
The Model 2010 is designed to be used
in pairs
, with one unit
installed between an asynchronous DTE and a synchronous DCE on
either end of a synchronous communication link. Figure 4 (below)
illustrates a typical Model 2010 installation.
4.1 CONNECTING THE ASYNCHRONOUS PORT
The asynchronous port of the Model 2010 is a DB-25 female and
is configured as “DCE”. Therefore, it wants to talk to a DTE device
such as a terminal or PC. The Model 2010 may be plugged directly into
the DB-25 serial port of a DTE or connected via “straight through”
cable.
4.2 CONNECTING THE SYNCHRONOUS PORT
The synchronous port of the Model 2010 is a DB-25 male and is
configured as “DTE”. Therefore, it wants to talk to a DCE device such
as a modem or multiplexer. The Model 2010 may be plugged directly
into the DB-25 serial port of a DCE or connected via “straight through”
cable.
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Async. DTE
Model 2010
Sync. DCE
Async. DTE
Figure 4. Typical Model 2010 application
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APPENDIX A
SPECIFICATIONS
Data Rates: Up to 19.2 Kbps
Clocking: Provided by modem or multiplexer
Buffer: 4 bit RTS override feature empties buffers
before dropping RTS, making the Model
2010 usable in a polling environment
Data Transmission: Full or half duplex
Connectors: Asynchronous: DB-25 female
Synchronous: DB-25 male
Power: No external power required; uses power
from data and control signals
Temperature Range: 0-60°C (32-140°F)
Altitude: 0-15,000 feet
Humidity: 5 to 95% noncondensing
Dimensions: 3.2” x 2.0” x 0.75”
Weight: 2 oz.
APPENDIX B
ASYNCHRONOUS PORT CONNECTIONS
(CONFIGURED AS “DCE”)
Pin Name Description
1 FG Frame Ground; connected straight to synchronous port
2 TXD Transmit Data (to 2010); data input from asynchronous port;
input to the 2010 power supply
3 RXD Receive Data (from 2010); data output to asynchronous port
4 RTS Request to Send (to 2010); input to the 2010 power supply
5 CTS Clear to Send (from 2010); connected straight through to
synchronous port
6 DSR Data Set Ready (from 2010); connected straight through to
synchronous port
7 SG Signal Ground; connected straight through to synchronous port
8 CD Carrier Detect (from 2010); connected straight through to
synchronous port
9 +DCV Connected straight through to synchronous port
10 -DCV Connected straight through to synchronous port
20 DTR Data Terminal Ready (to 2010); input to 2010 power supply
22 RI Ring Indicator (from 2010); connected straight through to
synchronous port
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APPENDIX C
SYNCHRONOUS PORT CONNECTIONS
(CONFIGURED AS “DTE”)
Pin
Name Description
1 FG Frame Ground; connected straight to asynchronous port
2 TXD Transmit Data (from 2010); data output to synchronous port
3 RXD Receive Data (to 2010); data input from the synchronous port;
input to 2010 power supply
4 RTS Request to Send (from 2010); 4 bit delay from asynchronous
port (2010 waits 4 bits before dropping RTS to the
synchronous port; this facilitates use in a polling environment)
5 CTS Clear to Send (to 2010); connected straight through to
asynchronous port
6 DSR Data Set Ready (to 2010); connected straight through to
asynchronous port
7 SG Signal Ground; connected straight through to asynchronous
port
8 CD Carrier Detect (to 2010); connected straight through to
asynchronous port
9 +DCV Connected straight through to asynchronous port
10 -DCV Connected straight through to asynchronous port
15 TXC Transmit clock (to 2010); used to synchronize data conversion
from 2010 to synchronous port
17 RXC Receive clock (to 2010); used to synchronize data conversion
from 2010 to synchronous port
20 DTR Data Terminal Ready (from 2010); input to 2010 power supply
22 RI Ring Indicator (to 2010); connected straight through to
asynchronous port
APPENDIX D
BLOCK DIAGRAM
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