Patton electronics 1080A User manual

USER
MANUAL
MODEL 1080A
Universal Synchro-
nous & Asynchronous
Short Range Modem
SALES OFFICE
[phone]
TECHNICAL SUPPORT
[phone]
Part# 07M1080A
Rev. E
Revised 7/2/12
An ISO-9001Certified
Company
CERTIFIED

2
CONTENTS
1.0 Warranty Information ................................................................. 4
1.1 Radio and TV Interference............................................................ 4
1.2 CE Notice...................................................................................... 4
1.3 Service.......................................................................................... 5
2.0 General Information.................................................................... 6
2.1 Features........................................................................................ 6
2.2 Description.................................................................................... 6
3.0 Configuration Overview ............................................................. 7
3.1 Configuration Switches................................................................. 7
3.2 Configuration Switch Set “S1”....................................................... 8
Switches S1-1 through S1-4: Data Rate Setting .......................... 8
Switches S1-5 and S1-6: Clock Source........................................ 9
Switch S1-7: Asynchronous/Synchronous Mode.......................... 9
Switch S1-8: Carrier Control Method.......................................... 10
3.3 Configuration Switch Set “S2”..................................................... 10
Switches S2-1 and S2-2: Word Length ...................................... 11
Switch S2-3: Extended Signaling Rate....................................... 11
Switches S2-4 and S2-5: RTS/CTS Delay ................................. 11
Switch S2-6: V.54 Loopback Test Enable.................................. 12
Switch S2-7: 2-Wire/4-Wire Mode Selection .............................. 12
3.4 Configuration Switch Set “S3”..................................................... 12
Switches S3-1 & S3-2: Input Impedance.................................... 12
Switch S3-4: Mode Selection...................................................... 13
Switch S3-5: RS-232 Initiation of Local Loopback Test.............. 13
Switch S3-6: RS-232 Initiation of Remote Loopback Test.......... 14
Switches S3-7 and S3-8: Anti-stream Control............................ 14
4.0 Installation................................................................................. 15
4.1 Two-wire Installation................................................................... 15
Two-Wire Cable Connection Via RJ-45...................................... 16
Two-Wire Cable Connection Via Terminal Blocks...................... 17
4.2 Four-wire Installation .................................................................. 17
Four-Wire Cable Connection Via RJ-45..................................... 18
Four-Wire Cable Connection Via Terminal Blocks..................... 19
4.3 Four-wire, Multipoint Installation................................................. 19
Multipoint Twisted Pair Connection............................................ 20
4.4 RS-232 Connection .................................................................... 21
5.0 Operation................................................................................... 22
5.1 LED Status Monitors................................................................... 22
The “TD” and “RD” Indicators..................................................... 22
The “RTS” and “CD” Indicators................................................... 22
The “Test” Indicator.................................................................... 22
The “Error” Indicators ................................................................. 23
5.2 Anti-streaming Error Indicator..................................................... 24
5.3 Power-up .................................................................................... 24

3
5.4 V.54 Test Modes......................................................................... 25
Local Analog Loopback (LAL) .................................................... 25
Remote Digital Loopback (RDL)................................................. 25
Using the V.52 BER Test Independently.................................... 26
5.5 Power-down................................................................................ 26
A
Specifications ........................................................................... 27
A.1 Transmission Format ................................................................... 27
A.2 Interface ...................................................................................... 27
A.3 Transmission Line ....................................................................... 27
A.4 Data Rates .................................................................................. 27
A.5 Clocking ...................................................................................... 27
A.6 Controls ...................................................................................... 27
A.7 Applications ................................................................................ 27
A.8 Indicators .................................................................................... 27
A.9 RTS Anti-stream Timer ................................................................ 27
A.10 Diagnostics ................................................................................. 28
A.11 Transformer Isolation .................................................................. 28
A.12 Surge Protection ......................................................................... 28
A.13 Temperature ............................................................................... 28
A.14 Humidity ...................................................................................... 28
A.15 Dimensions ................................................................................. 28
A.16 Power Input (US) ......................................................................... 28
B
Factory Replacement Parts and Accessories........................ 29
C
Cable Recommendations......................................................... 30
D
Interface Pin Assignment......................................................... 31
E
Patton Model 1080A Series Block Diagram............................ 32

4
1.0 WARRANTY INFORMATION
Patton Electronics warrants all Model 1080A Series 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 the 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 performs 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 spe-
cifically 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.
Note Conformity documents of all Patton products can be viewed
online at www.patton.com under the appropriate product page.
1.1 RADIO AND TV INTERFERENCE
The Model 1080A Series 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 1080A Series has been tested and found
to comply with the limits for a Class A computing device in accordance
with specifications in Subpart B 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 1080A Series does
cause interference to radio or television reception, which can be deter-
mined 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 dif-
ferent 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 European Union (EU). A Cer-
tificate of Compliance is available by contacting Technical Support.

5
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 Materi-
als Authorization number on the outside of the shipping container. This
number may be obtained from Patton Electronics Technical Services at:
•Tel:[phone]
•Email:[e-mail]
• URL: http://www.patton.com
Note Packages received without an RMA number will not be
accepted.
Technical support is available from 8 AM to 5 PM EST (8:00 to 17:00
UTC-5), Monday through Friday.

6
2.0 GENERAL INFORMATION
Thank you for your purchase of this Patton Electronics product. This
product has been thoroughly inspected by Patton's qualified technicians.
If any questions or problems arise during installation or use of this prod-
uct, please do not hesitate to contact Patton Electronics Technical Sup-
port at [phone].
2.1 FEATURES
• Synchronous or asynchronous operation
• Supports data rates up to 57.6 kbps
• Two-wire/half duplex or four-wire/full or half duplex
• V.52 & V.54 test modes
• Automatic equalization & gain control
• Anti-streaming timer
• Distances up to 20 miles (32 km)
• Point-to-point or multipoint
• Internal, external or received loopback clocking
• Hardware and software flow control support
• Built-in transformer isolation & high speed surge protection
• External AC power
• Bi-color LED indicators
• Detects broken or inferior cable by lighting error LED
2.2 DESCRIPTION
The Model 1080A Series Universal Short Range Modem operates 2-
wire (half duplex) or 4-wire (full or half duplex), in synchronous or asyn-
chronous modes, over unconditioned telephone lines. The Model 1080A
supports bit rates up to 57.6 kbps. The 1080A operates in synchronous
mode between the local and remote modems; when connected to an
asynchronous RS-232 device, the Model 1080A Series SRM converts
the asynchronous data to synchronous data.
The Model 1080A Series has several features to enhance overall perfor-
mance: automatic equalization, automatic gain control, anti-streaming
timer, transformer isolation to guard against data loss due to ground
potential differences, and Silicon Avalanche Diode surge protection to
guard against data line transients.

7
The Model 1080A Series features V.52 compliant bit error rate pattern
tests and two V.54 test modes: local analog loopback and remote digital
loopback. The operator at the local end may test both local and remote
modems, plus the line, in the digital loopback mode. Both RDL and LAL
modes can be controlled by a manual switch or via the V.24/RS-232
interface.
3.0 CONFIGURATION OVERVIEW
The Model 1080A Series is fairly simple to install and is ruggedly
designed for excellent reliability: just set it and forget it. The following
instructions will help you set up and install the Model 1080A properly.
3.1 CONFIGURATION SWITCHES
The Model 1080A Series uses a unique set of 24 external mini DIP
switches that allow configuration to an extremely wide range of applica-
tions. These 24 DIP switches are grouped into three eight-switch sets,
and are externally accessible from the underside of the unit (see
Figure 1). Since all configuration DIP switches are externally accessible,
there is no need to open the case for configuration.
The configuration switches allow you to select data rates, clocking meth-
ods, V.52 & V.54 tests, word lengths, extended signaling rates, async. or
sync. mode, 2- or 4-wire operation, anti-stream control and input imped-
ance. The drawings, text and tables on the following pages describe all
switch locations, positions and functions.
Figure 1. Underside of Model 1080A Series, showing location of DIP switches
12345678
ON
12345678
ON
12345678
ON
FRONT
REAR
S1
S2
S3
ON
OFF

8
Each Model 1080A Series SRM has three sets of eight switches, yielding
24 total DIP switches. The three sets will be referred to as S1, S2 and
S3. As Figure 2 shows, the orientation of all DIP switches is the same
with respect to “ON” and “OFF” positions.
Figure 2. Close-up of DIP switches showing “ON” and “OFF” positions
3.2 CONFIGURATION SWITCH SET “S1”
The DIP switches on S1 set data rate, clock source, async./sync. mode
and carrier control method. The default settings are summarized in
Table 1.
Table 1: Model 1080A S1 Summary
Switches S1-1 through S1-4: Data Rate Setting
Switches S1-1 through S1-4 are set in combination to determine the
asynchronous and synchronous data rate for the Model 1080A.
OFF
ON
12345678
ON
Position Function Factory Default
S1-1 Data Rate On
S1-2 Data Rate Off
S1-3 Data Rate Off
S1-4 Data Rate On
S1-5 Clock Source On
S1-6 Clock Source On
S1-7 Async./Sync. On Async.
S1-8 Carrier Control Off Constantly On
9,600 bps
(1080A)
or
16,000 bps
(1080A-64)
Internal
}
}

9
Shown in the tables below are DIP Switch settings for Model 1080A.
Switches S1-5 and S1-6: Clock Source
Switches S1-5 and S1-6 are set in combination to determine the transmit
clock source for the Model 1080A Series.
Switch S1-7: Asynchronous/Synchronous Mode
The setting for switch S1-7 determines whether the Model 1080A Series
is in asynchronous or synchronous operating mode.
Table 2: Model 1080A Data Rate Settings
S1-1 S1-2 S1-3 S1-4 Setting
On On On On 1.2 kbps
Off On On On 1.8 kbps
On Off On On 2.4 kbps
Off Off On On 3.6 kbps
On On Off On 4.8 kbps
Off On Off On 7.2 kbps
On Off Off On 9.6 kbps
Off Off Off On 14.4 kbps
On On On Off 19.2 kbps
Off On On Off 28.8 kbps
On On Off Off 38.4 kbps
Off On Off Off 57.6 kbps
S1-5 S1-6 Setting
On On Internal transmit clock
Off On Receive recover clock
On Off External transmit clock
S1-7 Setting
On Asynchronous
Off Synchronous

10
Switch S1-8: Carrier Control Method
The setting for switch S1-8 determines whether the carrier is “constantly
on” or “controlled by RTS”. This setting allows for operation in switched
carrier, multipoint and/or hardware handshaking applications.
3.3 CONFIGURATION SWITCH SET “S2”
The DIP switches on S2 set word length, extended signaling rate,
RTS/CTS delay, V.52 and V.54 diagnostic test and 2- and 4-wire opera-
tion.
Table 3: S2 Summary
S1-8 Setting
Off Constantly on
On Controlled by RTS
Position Function Factory Default
S2-1 Word Length Off
S2-2 Word Length Off
S2-3
Extended Signaling Rate Off -2.5% to 1%
S2-4 RTS/CTS Delay On
S2-5 RTS/CTS Delay On
S2-6 V.52/V.54 Tests Off
Normal Operation
S2-7 2-Wire/4-Wire Off (4-Wire)
S2-8 Not Used N/A
}
}
7 ms
10 bits

11
Switches S2-1 and S2-2: Word Length
Switches S2-1 and S2-2 are set in combination to determine the word
length for asynchronous data.
Switch S2-3: Extended Signaling Rate
The setting for switch S2-3 determines the range of variability the Model
1080A Series “looks for” in asynchronous data rates (i.e., the actual vari-
ance from a given frequency level the Model 1080A Series will tolerate).
Switches S2-4 and S2-5: RTS/CTS Delay
The combined settings for switches S2-4 and S2-5 determine the
amount of delay between the time the unit “sees” RTS and when it sends
CTS. Options are no delay, 7 ms and 53 ms.
S2-1 S2-2 Setting
Off On 8 bits
On On 9 bits
Off Off 10 bits
On Off 11 bits
S2-3 Setting
Off -2.5% to +1%
On -2.5% to +2.3%
S2-4 S2-5 Setting
On On 7 ms
Off On 53 ms
On Off No delay
Off Off No delay

12
Switch S2-6: V.54 Loopback Test Enable
To reset the V.54 circuit, set switch S2-6 to the “ON” position, then back
to the “OFF” position.
Switch S2-7: 2-Wire/4-Wire Mode Selection
The setting for switch S2-7 determines whether the Model 1080A Series
is operating in 2-wire or 4-wire mode.
3.4 CONFIGURATION SWITCH SET “S3”
The DIP switches on S3 set the anti-stream control, local loopback
enable, remote loopback enable and receive (input) impedance levels for
the Model 1080A Series. Factory default positions of Switch S3 are
shown in Table 4.
Table 4: S3 Summary
Switches S3-1 & S3-2: Input Impedance
The setting for Switches S3-1 and S3-2 determines the 1080A Series’
input impedance. This allows you to choose the optimum impedance set-
ting for your application. In long distance applications the impedance of
the cable must match the impedance of the load (or resistor) of the
Model 1080A Series unit. Thicker gauge cables requires a lower ohm
S2-6 Setting
Off V.54 Normal Operation
On V.54 Testing Disabled
S2-7 Setting
Off 4-wire (full or half duplex)
On 2-wire (half duplex only)
Position Function Factory Default
S3-1 Input Impedance On
S3-2 Input Impedance Off
S3-3 Not yet assigned n/a
S3-4 Mode Selection On Point to Point
S3-5 Local Loopback Off Disabled
S3-6 Remote Loopback Off Disabled
S3-7 Anti-stream Control Off
S3-8 Anti-stream Control Off
200 Ohms
Disabled
}
}

13
setting, while a thinner gauge cable should receive a higher ohm setting.
If you are using higher speeds you will need a lower ohm setting, and a
higher ohm setting for the slower speeds. Refer to Table 5 for assistance
in selecting a setting.
Table 5: S3-1, S3-2 Selection Table for Model 1080A
Switch S3-4: Mode Selection
The setting for switch S3-4 allows the user to choose the appropriate set-
ting for point-to-point or multipoint applications.
Switch S3-5: RS-232 Initiation of Local Loopback Test
The setting for switch S3-5 determines whether or not the Model 1080A
Series’ local analog loopback test can be initiated by raising pin 18 on
the RS-232 interface.
S3-1 S3-2 Setting
On On 130 ohms
On Off 200 ohms
Off On 320 ohms
Off Off High impedance (minimum 2k¾)
S3-4 Setting
On Point-to-point
On Multipoint application as “Master”
Off Multipoint application as “Slave”
S3-5 Setting
On RS-232 initiation enabled
Off RS-232 initiation disabled
Gauge of
Cable
19AWG/.9mm
22AWG/.6mm
24AWG/.5mm
26AWG/.4mm
1.2
320
320
320
320
Data Rates, kb/s
1.8
320
320
320
320
2.4
200
320
320
320
3.6
200
200
320
320
4.8
200
200
200
320
7.2
200
200
200
200
9.6
200
200
200
200
14.4
130
200
200
200
19.2
130
130
200
200
28.8
130
130
130
200
38.4
130
130
130
130
57.6
130
130
130
130

14
Switch S3-6: RS-232 Initiation of Remote Loopback Test
The setting for switch S3-6 determines whether or not the Model 1080A
Series’ remote digital loopback test can be initiated by raising pin 21 on
the RS-232 interface.
Switches S3-7 and S3-8: Anti-stream Control
Switches S3-7 and S3-8 are set in combination to determine the time out
period for the Model 1080A Series’ anti-stream control timer.
S3-6 Setting
On RS-232 initiation enabled
Off RS-232 initiation disabled
S3-7 S3-8 Setting
Off Off Disabled
Off On 12.5 seconds
On Off 50.0 seconds
On On 12.5 seconds

15
4.0 INSTALLATION
The Model 1080A Series operates in four twisted pair topologies: 2-
wire/point-to-point, 2-wire/multipoint, 4-wire/point-to-point, and 4-
wire/multipoint. In each of these topologies, the twisted pair wire must be
19 - 26 AWG "dry", unconditioned metallic wire (see Appendix C for wire
recommendations). Dial-up analog circuits, such as those used with a
standard Hayes-type modem, are not acceptable. The twisted pair may
be shielded or unshielded. Both types yield favorable results.
The Model 1080A Series offers two methods of twisted pair connection:
RJ-45 jack and terminal blocks. Figure 3 shows the location of these
interfaces on the rear panel of the Model 1080A Series. Connect the wire
to each Model 1080A Series as described in the instructions that follow
the illustration. The “+” and “-” indicators are for reference only. The
Model 1080A Series is not sensitive to polarity.
Figure 3. Rear view of Model 1080A Series - AC Power
Figure 4. Rear view of Model 1080A Series - DC Power
4.1 TWO-WIRE INSTALLATION
When communicating over a single twisted pair circuit, the Model 1080A
Series operates half duplex: that is, it transmits in only one direction at a
time. This method of operation is effective for both point-to-point and
multipoint applications.
In single-pair point-to-point applications, you will need a pair of Model
1080As for each circuit—one at each end of the single pair wire. In sin-
gle-pair multipoint applications you will need three or more Model 1080A
Series units. These can be connected using a star topology, although a
daisy chain topology is usually used.
RS-232 Interface (Female)
Made In the USA
Line
RX+ RX- GND TX- TX+
12V, 2A
RS-232 Interface (Female)
Made In the USA
Line
Power
+ -
RX+ RX- GND TX- TX+

16
Two-Wire Cable Connection Via RJ-45
1. The RJ-45 jack on a Model 1080A Series Short Range Modem is
prewired for a standard TELCO wiring environment. To be sure you
have the right wiring, use the table below as a guide.
† Connection to ground is optional
2. Proper wiring of pairs between the two modems is as follows:
*Standard color codes—yours may be different
3. AT&T standard modular color codes:
RJ-45 Signal
1 ------------------ NC
2 ------------------ GND†
3 ------------------ RCV
4 ------------------ XMT
5 ------------------ XMT
6 ------------------ RCV
7 ------------------ GND
8 ------------------ NC
Signal Pin# Color* Color Pin# Signal
XMT 4Green --------- Green 4XMT
XMT 5Red --------- Red 5XMT
1 - Blue
2 - Orang
e
3 - Black
4 - Red
5 - Green
6 - Yellow
7 - Brown
8 - Slate

17
Two-Wire Cable Connection Via Terminal Blocks
If you are not going to use the modular jacks, follow the instructions
below.
1. Locate the terminal block on the back of the unit. It should look like
the following diagram:
Note The “+” and “-” indicators are for reference only. The Model
1080A Series is not sensitive to polarity.
2. Connect one wire of the pair to a Transmit lug (TX+ or TX-) on both
the local and remote Model 1080A.
3. Connect the other wire of the pair to the other Transmit lug on both
the local and remote Model 1080A.
4. If there is a shield around the telephone cable, it may be connected
to GND on the terminal block. We recommend connecting the shield
at the computer end only to avoid ground loops. A ground wire is not
necessary for proper operation of these units.
5. When you finish connecting the telephone line to units at both ends,
it should look like the following diagram:
4.2 FOUR-WIRE INSTALLATION
When communicating over a two twisted pair circuit, the Model Series
can operate full or half duplex, point-to-point or multipoint. In two pair
point-to-point applications, you will need a pair of Model 1080As for each
circuit—one at each end of the single pair wire. In two pair multipoint
applications you will need three or more Model 1080A Series units.
These can be connected using a star topology, although a daisy chain
topology is usually used.
RX+ RX- GND TX- TX+
XMT XMT
XMT XMT
GND GND
To Shield (Optional)
}
One Pa
ir

18
Four-Wire Cable Connection Via RJ-45
1. The RJ-45 jack on a Model 1080A Short Range Modem is prewired
for a standard TELCO wiring environment. To be sure you have the
right wiring, use the table below as a guide.
†Connection to ground is optional
2. Proper crossing of pairs between the two modems is as follows:
*Standard color codes—yours may be different
†Connection to ground is optional
3. AT&T standard modular color codes:
RJ-45 Signal
1 ------------------ NC
2 ------------------ GND†
3 ------------------ RCV
4 ------------------ XMT
5 ------------------ XMT
6 ------------------ RCV
7 ------------------ GND
8 ------------------ NC
Signal Pin# Color* Color Pin# Signal
GND† 2Orange --------- Brown 7GND
RCV 3Black --------- Green 5XMT
XMT 4Red --------- Yellow 6RCV
XMT 5Green --------- Black 3RCV
RCV 6Yellow --------- Red 4XMT
GND 7Brown --------- Orange 2GND
1 - Blue
2 - Orang
e
3 - Black
4 - Red
5 - Green
6 - Yellow
7 - Brown
8 - Slate

19
Four-Wire Cable Connection Via Terminal Blocks
If you are not going to use the modular jacks then follow the instructions
below.
1. Locate the terminal block on the back of the unit. It should look like
the following diagram:
* The “+” and “-” indicators are for reference only.
The Model 1080A Series is not sensitive to polarity.
2. Connect one pair of wires in the telephone cable to the Transmit
lugs (TX+ and TX-) on the terminal block.
3. Connect the other pair of wires in the telephone cable to the Receive
lugs (RX+ and RX-) on the terminal block.
4. If there is a shield around the telephone cable, it may be connected
to "G" on the terminal block. We recommend connecting the shield
at the computer end only to avoid ground loops. A ground wire is not
necessary for proper operation of these units.
5. When you finish connecting the telephone line to units at both ends,
it should look like the following diagram:
4.3 FOUR-WIRE, MULTIPOINT INSTALLATION
Multipoint operation involves the connection of several terminals to one
host port. In such an application, one local Model 1080A is used as a
master unit, and it is connected to several remote Model 1080As that are
acting as slaves. Up to 25 Model 1080A Series slaves may be connected
to one host Model 1080A Series master SRM, provided that the comput-
ing hardware and software support that many terminal drops.
In a multipoint environment the master Model 1080A transmits continu-
ally. Initiation of two-way communication is carrier-controlled by each
“slave” Model 1080A Series unit.
RX+ RX- GND TX- TX+
XMT RCV
XMT RCV
GG
RCV XMT
RCV XMT
To Shield (Optional)
}
One Pa
ir
}One Pa
ir

20
To facilitate multipoint communication, the master Model 1080A should
have its carrier control DIP switch set to “constantly ON” (S1-8=OFF).
Each slave Model 1080A Series unit should have its carrier control DIP
switch set to “controlled by RTS” (S1-8=ON). Figure 5 illustrates a typical
Model 1080A Series multipoint application.
Figure 5. Typical multipoint set-up
Multipoint Twisted Pair Connection
The Model 1080A Series supports multipoint applications using a star
topology. Maximum distance between the units will vary based upon the
number of drops, data rate, wire gauge, etc. Call Patton Technical Sup-
port for specific distance estimates. The diagrams below show how to
wire the one-pair and two-pair cables properly for a Model star topology.
Note that the ground connection is not needed.