USER
MANUAL
MODEL 1080A and
MODEL 1080A-64
Universal Synchronous &
Asynchronous
Short Range Modems
Part #07M1080A-D
Doc. #072041UD
Revised 6/19/98
SALES OFFICE
(301) 975-1000
TECHNICAL SUPPORT
(301) 975-1007
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An ISO-9001
Certified Company
2.0 GENERAL INFORMATION
3.0 CONFIGURATION OVERVIEW
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 product, please do not hesitate to contact Patton Electronics
Technical Support at (301) 975-1007.
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 or 1080A-
64 properly.
3.1 CONFIGURATION SWITCHES
2.1 FEATURES
The Model 1080A Series uses a unique set of 24 external mini DIP
switches that allow configuration to an extremely wide range of
applications. 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.
• Synchronous or asynchronous operation
• Model 1080A supports data rates up to 57.6 kbps
• Model 1080A-64 supports data rates up to 64 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)
The configuration switches allow you to select data rates, clocking
methods, V.52 & V.54 tests, word lengths, extended signaling rates,
async. or sync. mode, 2- or 4-wire operation, anti-stream control and
input impedance. The drawings, text and tables on the following pages
describe all switch locations, positions and functions.
• 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
FRONT
The Model 1080A Series Universal Short Range Modem
operates 2-wire (half duplex) or 4-wire (full or half duplex), in
synchronous or asynchronous modes, over unconditioned telephone
lines. The Model 1080A supports bit rates up to 57.6 kbps. The Model
1080A-64 supports rates up to 64 kbps. Both operate 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.
ON
ON
S1
1
2
3
4
5
6
7
8
The Model 1080A Series has several features to enhance overall
performance: 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.
ON
1
S2
S3
2
3
4
5
6
7
8
ON
1
2
3
4
5
6
7
8
OFF
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.
REAR
Figure 1. Underside of Model 1080A Series, showing location of DIP switches
3
4
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.
Shown in the tables below are DIP Switch settings for Models
1080A and 1080A-64.
MODEL 1080A DATA RATE SETTINGS
S1-1
On
Off
On
Off
On
Off
On
Off
On
Off
On
Off
S1-2
On
On
Off
Off
On
On
Off
Off
On
On
On
On
S1-3
On
On
On
On
Off
Off
Off
Off
On
On
Off
Off
S1-4
On
On
On
On
On
On
On
On
Off
Off
Off
Off
Setting
1.2 kbps
1.8 kbps
2.4 kbps
3.6 kbps
4.8 kbps
7.2 kbps
9.6 kbps
14.4 kbps
19.2 kbps
28.8 kbps
38.4 kbps
57.6 kbps
ON
ON
1
2
3
4
5
6
7
8
OFF
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 the table below.
MODEL 1080A S1 SUMMARY TABLE
DATA RATE SETTINGS - MODEL 1080A-64
Position
S1-1
S1-2
S1-3
S1-4
S1-5
S1-6
S1-7
S1-8
Function
Data Rate
Factory Default
S1-1
Off
Off
S1-2
On
Off
S1-3
Off
Off
S1-4
On
On
Setting
16 kbps
32 kbps
64 kbps
On
Off
Off
On
On
On
On
Off
9,600 bps
Data Rate
(1080A) or
Off
On
On
Off
Data Rate
16,000 bps
(1080A-64)
}
Data Rate
Switches S1-5 and S1-6: Clock Source
Clock Source
Clock Source
Async./Sync.
Carrier Control
Internal
}
Switches S1-5 and S1-6 are set in combination to determine the
transmit clock source for the Model 1080A Series.
Async.
Constantly On
S1-5
On
Off
S1-6
On
On
Setting
Internal transmit clock
Receive recover clock
External transmit clock
Switches S1-1 through S1-4: Data Rate Setting
On
Off
Switches S1-1 through S1-4 are set in combination to determine
the asynchronous and synchronous data rate for the Model 1080A and
1080A-64.
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.
S1-7
On
Off
Setting
Asynchronous
Synchronous
5
6
Switch S2-3: Extended Signaling Rate
Switch S1-8: Carrier Control Method
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 variance from a given frequency level the Model 1080A Series
will tolerate).
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.
S2-3
Off
On
Setting
-2.5% to +1%
-2.5% to +2.3%
S1-8
Off
On
Setting
Constantly on
Controlled by RTS
3.3 CONFIGURATION SWITCH SET “S2”
Switches S2-4 and S2-5: RTS/CTS Delay
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
operation.
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 SUMMARY TABLE
S2-4
On
Off
On
Off
S2-5
On
On
Off
Off
Setting
7 ms
53 ms
No delay
No delay
Position
S2-1
S2-2
S2-3
S2-4
S2-5
S2-6
S2-7
S2-8
Function
Word Length
Factory Default
Off
10 bits
}
Word Length
Off
Extended Signaling Rate
RTS/CTS Delay
RTS/CTS Delay
V.52/V.54 Tests
2-Wire/4-Wire
Not Used
Off -2.5% to 1%
On
Switch S2-6: V.54 Loopback Test Enable
7 ms
}
On
To reset the V.54 circuit, set switch S2-6 to the “ON” position, then
back to the “OFF” position.
Off Normal Operation
Off
(4-Wire)
S2-6
Off
On
Setting
V.54 Normal Operation
V.54 Testing Disabled
N/A
Switches S2-1 and S2-2: Word Length
Switch S2-7: 2-Wire/4-Wire Mode Selection
Switches S2-1 and S2-2 are set in combination to determine the
word length for asynchronous data.
The setting for switch S2-7 determines whether the Model 1080A
Series is operating in 2-wire or 4-wire mode.
S2-1
Off
On
Off
On
S2-2
On
On
Off
Off
Setting
8 bits
9 bits
10 bits
11 bits
S2-7
Off
Setting
4-wire (full or half duplex)
2-wire (half duplex only)
On
8
7
3.4 CONFIGURATION SWITCH SET “S3”
S3-1, S3-2 SELECTION TABLE FOR MODEL 1080A
Data Rates, kb/s
Gauge of
Cable
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 the table below.
1.2 1.8 2.4 3.6 4.8 7.2 9.6 14.4 19.2 28.8 38.4 57.6
320 320 200 200 200 200 200 130 130 130 130 130
320 320 320 200 200 200 200 200 130 130 130 130
320 320 320 320 200 200 200 200 200 130 130 130
320 320 320 320 320 200 200 200 200 200 130 130
19AWG/.9mm
22AWG/.6mm
24AWG/.5mm
26AWG/.4mm
S3 SUMMARY TABLE
Position
S3-1
S3-2
S3-3
S3-4
S3-5
S3-6
S3-7
S3-8
Function
Factory Default
Input Impedance
Input Impedance
Not yet assigned
Mode Selection
Local Loopback
Remote Loopback
Anti-stream Control
Anti-stream Control
On
200 Ohms
}
Off
S3-1, S3-2 SELECTION TABLE FOR MODEL 1080A-64
n/a
Data Rates, kb/s
Gauge of
Cable
On Point to Point
16
32
64
Off
Off
Off
Off
Disabled
Disabled
130 130
200 130
200 130
200 200
130
130
130
130
19AWG/.9mm
22AWG/.6mm
24AWG/.5mm
26AWG/.4mm
Disabled
}
Switches S3-1 & S3-2: Input Impedance
Switch S3-4: Mode Selection
The setting for Switches S3-1 and S3-2 determines the 1080A
Series’ input impedance. This allows you to choose the optimum
impedance setting 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 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 the table on the following page for assistance in
selecting a setting.
The setting for switch S3-4 allows the user to choose the
appropriate setting for point-to-point or multipoint applications.
S3-4
On
Setting
Point-to-point
On
Off
Multipoint application as “Master”
Multipoint application as “Slave”
Switch S3-5: RS-232 Initiation of Local Loopback Test
S3-1
On
On
S3-2
On
Off
Setting
130 Ohms
200 Ohms
320 Ohms
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.
Off
On
Off
Off
High impedance (minimum 2kΩ)
S3-5
On
Off
Setting
RS-232 initiation enabled
RS-232 initiation disabled
9
10
4.0 INSTALLATION
Switch S3-6: RS-232 Initiation of Remote Loopback Test
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 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.
S3-6
On
Setting
RS-232 initiation enabled
RS-232 initiation disabled
Off
The Model 1080A Series offers two methods of twisted pair
connection: RJ-45 jack and terminal blocks. Figure 3 (below) 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.
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.
S3-7
Off
S3-8
Off
Setting
Disabled
Off
On
On
On
Off
On
12.5 seconds
50.0 seconds
12.5 seconds
Made In the USA
Powered Short Range
Modem
RX+ RX- GND TX- TX+
Power
RS-232 Interface (Female)
Line
Figure 3. Rear view of Model 1080A Series
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 1080A or 1080A-64s for each circuit—one at each end of the
single pair wire. In single-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.
12
11
4.1.1 Two-Wire Cable Connection Via RJ-45
4.1.2 Two-Wire Cable Connection Via Terminal Blocks
A. 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.
If you are not going to use the modular jacks, follow the
instructions below.
A. Locate the terminal block on the back of the unit. It should
look like the following diagram:
RJ-45
SIGNAL
1 -------------NC
2 -------------GND†
3 -------------RCV
4 -------------XMT
5 -------------XMT
6 -------------RCV
7 -------------GND
8 -------------NC
RX+ RX- GND TX- TX+
NOTE: * The “+” and “-” indicators are for reference only. The Model 1080A Series is
not sensitive to polarity.
B. Connect one wire of the pair to a Transmit lug (TX+ or TX-) on
both the local and remote Model 1080A or 1080A-64.
†Connection to ground is optional
C. Connect the other wire of the pair to the other Transmit lug on
both the local and remote Model 1080A or 1080A/64.
B. Proper wiring of pairs between the two modems is as follows:
SIGNAL PIN#
COLOR*
COLOR PIN#
SIGNAL
D. 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.
XMT
XMT
4
5
Green ------------Green
Red ---------------Red
4
5
XMT
XMT
*Standard color codes—yours may be different
E. When you finish connecting the telephone line to units at both
ends, it should look like the following diagram:
C. AT&T standard modular color codes:
XMT
XMT
GND
XMT
XMT
GND
One Pair
}
To Shield (Optional)
1 - Blue
2 - Orange
3 - Black
4 - Red
5 - Green
6 - Yellow
7 - Brown
8 - Slate
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 or 1080A-64s 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.
13
14
4.2.1 Four-Wire Cable Connection Via RJ-45
4.2.2 Four-Wire Cable Connection Via Terminal Blocks
A. The RJ-45 jack on a Model 1080A/1080A-64 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.
If you are not going to use the modular jacks then follow the
instructions below.
A. Locate the terminal block on the back of the unit. It should
look like the following diagram:
RJ-45
SIGNAL
1 -------------NC
2 -------------GND†
3 -------------RCV
4 -------------XMT
5 -------------XMT
6 -------------RCV
7 -------------GND
8 -------------NC
RX+ RX- GND TX- TX+
* The “+” and “-” indicators are for reference only. The Model 1080A Series is
not sensitive to polarity.
B. Connect one pair of wires in the telephone cable to the
Transmit lugs (TX+ and TX-) on the terminal block.
B. Proper crossing of pairs between the two modems is as follows:
†Connection to ground is optional
C. Connect the other pair of wires in the telephone cable to the
Receive lugs (RX+ and RX-) on the terminal block.
SIGNAL PIN#
COLOR*
COLOR PIN#
SIGNAL
D. 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.
GND†
RCV
XMT
XMT
RCV
GND
2
3
4
5
6
7
Orange ----------Brown
Black -------------Green
Red ---------------Yellow
Green ------------Black
Yellow------------Red
Brown------------Orange
7
5
6
3
4
2
GND
XMT
RCV
RCV
XMT
GND
E. When you finish connecting the telephone line to units at both
ends, it should look like the following diagram:
*Standard color codes—yours may be different
†Connection to ground is optional
XMT
XMT
G
RCV
RCV
RCV
RCV
G
XMT
XMT
One Pair
One Pair
}
}
To Shield (Optional)
C. AT&T standard modular color codes:
1 - Blue
2 - Orange
3 - Black
4 - Red
5 - Green
6 - Yellow
7 - Brown
8 - Slate
15
16
4.3 FOUR-WIRE, MULTIPOINT INSTALLATION
HOST
FIRST SLAVE
SECOND SLAVE
Multipoint operation involves the connection of several terminals to
one host port. In such an application, one local Model 1080A/1080A-64
is used as a master unit, and it is connected to several remote Model
1080A/1080A-64s 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 computing hardware and software
support that many terminal drops.
XMT
RCV
RCV
RCV
XMT
XMT
XMT
RCV
RCV
RCV
XMT
XMT
In a multipoint environment the master Model 1080A or 1080A-64
transmits continually. Initiation of two-way communication is carrier-
controlled by each “slave” Model 1080A Series unit. To facilitate
multipoint communication, the master Model 1080A-64 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 4 illustrates a
typical Model 1080A Series multipoint application.
HOST
FIRST SLAVE
SECOND SLAVE
XMT
XMT
XMT
XMT
XMT
XMT
4.4 RS-232 CONNECTION
Connect the synchronous or asynchronous output of your RS-232
device to the DB-25 interface on the rear panel of the Model 1080A
Series. Note: The Model 1080A Series is wired to connect to a DTE.
If your RS-232 output device is DCE, call Patton Technical Support at:
for specific installation instructions.
Figure 4. Typical multipoint set-up
4.3.1 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 Support for specific distance estimates. Figures 11 and 12
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.
17
18
5.0 OPERATION
5.1.4 The “Error” Indicators
Once you have configured each Model 1080A Series unit properly
and connected the twisted pair and RS-232 cables (see Section 4.0),
you are ready to operate the units. This section describes reading the
LED status monitors, powering-up and using the built-in V.52 and V.54
test modes.
The “Error” indicator LED has three functions:
A. When the 1080A Series unit is in test mode (green “Test” LED is
lit), the error LED glows red when bit errors occur.
B. When not in test mode (green “Test” LED is off), the error LED is
used to indicate an RTS streaming condition. (See Section 5.2) for
information on the anti-streaming circuitry.
5.1 LED STATUS MONITORS
The Model 1080A Series features six front panel status LEDs that
indicate the condition of the modem and communication link. Figure 5
shows the front panel location of each LED. Following Figure 5 is a
description of each LED's function.
C. The “Error” LED is also used to detect line quality, such:
1. The improper use of flat (non-twisted pair) cable to connect
the modems.
2. One or more broken wire in the 4 wire twisted pair cable.
Model 1080 Universal Short Range Modem
3. The use of low quality twisted pair cable to connect the
modems.
V.54 Test
Modes
Test
TD
RD
CD
Error
RTS
4. Broken or corroded connector.
511
Remote
Normal
Local
511E
NOTE: In detecting line quality the “Error” LED indicator is designed for
4 wire twisted pair cable only, and may not function properly with two
wire cable.
Figure 5. Front view of Model 1080A Series
5.1.4.1 Setting Up The “Error” LED To Test Cable Quality
5.1.1 The “TD” and “RD” Indicators
If there is any question as to the quality of your line we recommend
the following test:
The “TD” and “RD” indicators blink red and green with data activity.
Red indicates a low RS-232 logic level, green indicates a high RS-232
logic level. Note: RS-232 devices idle in a low state, so the LED will
glow red if the connections are correct and the RS-232 device is in an
idle state.
1. Disconnect both local and remote modems from their RS-232
interface. Make sure “TD”, “RD” and “RTS” LEDs are lit red.
2. Set input impedance of both modems to 200Ω. (S3-1 “On”,
S3-2 “Off”). NOTE: When testing Model 1080A-64, use
22AWG, 24AWG, or 26AWG cable only,
5.1.2 The “RTS” and “CD” Indicators
3. For Model 1080A, set data rate on both modems for 9.6kbps
For Model 1080A-64, set data rate on both modems at 16
kbps.
The “RTS” and “CD” indicators are bi-color and will glow red for a
“low” signal or green for a “high” signal. RTS lights for an incoming
signal on RS-232 pin 4. CD lights for an incoming signal on the line
side, and the resulting output signal on RS-232 pin 8.
4. On local modem set “Carrier Constantly On”. (S1-8 “Off”)
5. Set remote modem to RTS control (S1-8, “On”).
5.1.3 The “Test” Indicator
6. Place both front panel toggle switches to neutral position.
(Test Led will not light)
The green “Test” LED indicates that V.52 or V.54 tests are running.
7. Connect both modems to the 4 wire twisted pair cable.
20
19
5.1.4.2 Reading The Test
5.4 V.54 TEST MODES
A. If line quality is good, “Error” LED on local modem will not light
and “CD” LED will be red. On remote modem “Error” LED will not light
and “CD” LED will light green.
The Model Series offers two V.54 test modes to evaluate the
condition of the modems and the communication link. These tests can
be activated physically from the front panel, or via the RS-232 interface.
Note: V.54 test modes are available for point-to-point applications only.
B. If flat cable is used or parts of the line are flat cable, “Error” LED
on local modem will light red and “CD” LED will light green. On remote
modem “Error” LED will not light and “CD” LED will light green.
5.4.1 Local Analog Loopback (LAL)
C. If one wire from the 4 wire twisted pair is broken “Error” LED will
light red and “CD” LED will light green on at least one modem.
The Local Analog Loopback (LAL) test checks the operation of the
local Model 1080A Series unit, and is performed separately on each
unit. Any data sent to the local Model 1080A or 1080A-64 in this test
mode will be echoed (returned) back to the user device. For example,
characters typed on the keyboard of a terminal will appear on the
terminal screen. To perform a LAL test, follow these steps:
Note: We cannot guarantee accurate detection if small pieces of flat
cable are present in the line beyond 1500ft of the local modem.
5.2 ANTI-STREAMING ERROR INDICATOR
A. Activate LAL. This may be done in one of two ways: First, by
moving the front panel toggle switch DOWN to "Local". Second, by
raising pin 18 on the RS-232 interface (Note: Make sure DIP switch
S2-6 is OFF, and DIP switch S3-5 is ON). Once LAL is activated, the
Model 1080A Series’ transmit output is connected to its own receiver.
The "test" LED should be lit.
When not in test mode (green “Test” LED is off), the front panel
“Error” LED is used to indicate a streaming error. When the Model
1080A Series’ anti-streaming circuitry is enabled, the RTS signal from
the DTE is timer controlled. The timer begins to count when the DTE
raises RTS. If the time period that RTS remains high exceeds the
preset time out period, the anti-stream circuit will force RTS low. The
“Error” LED will light red, indicating a streaming condition (RTS
continually on). This feature prevents a malfunctioning terminal from
tying-up a computer port in a multi-drop or polling environment. When
the DTE drops RTS, the anti-streaming timer is automatically reset and
the front panel “Error” LED turns off. The time out period is DIP switch
selectable for 12.5 or 50 seconds.
B. Verify that the data terminal equipment is operating properly and
can be used for a test. If a fault is indicated, call a technician or replace
the unit.
C. Perform a BER (bit error rate) test on each unit. If the BER test
equipment indicates no faults, but the data terminal indicates a fault,
follow the manufacturer's checkout procedures for the data terminal.
Also, check the RS-232 interface cable between the terminal and the
Model 1080A/1080A-64.
5.3 POWER-UP
Apply AC power to the Model 1080A Series by plugging the
separate AC power adapter first into the rear panel of the Model
1080A/1080A-64, and then into an acceptable AC power outlet. There
is no power switch on the Model 1080A/1080A-64; and the
remote/normal/loopback switch should be set to “normal”. When the
local and remote Model 1080A/1080A-64s are both powered up, and
passing data normally, the following LED conditions will exist:
5.4.2 Remote Digital Loopback (RDL)
The Remote Digital Loopback (RDL) test checks the performance of
both the local and remote Model 1080A/1080A-64s, and the
communication link between them. Any characters sent to the remote
1080A or 1080A-64 in this test mode will be returned back to the
originating device. For example, characters typed on the keyboard of
the local terminal will appear on the local terminal screen after having
been passed to the remote Model 1080A/1080A-64 and looped back.
To perform an RDL test, follow these steps:
• TD & RD = flashing red and green
• RTS & DCD = green
• TEST = off
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APPENDIX A
A. Activate RDL. This may be done in two ways: First, by moving
the front panel toggle switch UP to "Remote". Second, by raising pin 21
on the RS-232 interface (Note: Make sure DIP switch S3-6 is ON; and
DIP switch S2-6 is OFF).
PATTON MODEL 1080A SERIES SPECIFICATIONS
Transmission Format:
Synchronous or asynchronous, 2-
wire/half duplex, or 4-wire/full or half
duplex
B. Perform a BER (bit error rate) test on the system.
C. If the BER test equipment indicates a fault, and the Local Analog
Loopback test was successful for both Model 1080A Series units, you
may have a problem with the twisted pair line between the modems.
You should then test the twisted pair line for proper connections and
continuity.
Interface:
RS-232 (CCITT V.24) connection via
DB-25 female; twisted pair connection
via RJ-45 or terminal block
Transmission Line:
Data Rates:
2 or 4-wire UTP, 19 - 24 AWG
Model 1080A - Synchronous or
asynchronous at 1.2, 1.8, 2.4, 3.6, 4.8,
7.2, 9.6, 14.4, 19.2, 28.8, 38.4, and 57.6
kbps—switch selectable;
5.4.3 Using the V.52 BER Test Independently
The V.52 BER test can be used independently of the V.54 loopback
tests. This requires two operators: one to initiate and monitor the test
at the local 1080A/1080A-64, and one at the remote 1080A/1080A-64.
To use the V.52 BER test by itself, both operators should
simultaneously follow these steps:
Model 1080A-64 - Synchronous or
asynchronous at 16, 32, and 64
kbps—switch selectable
Clocking:
Controls:
Internal, external or receive recover
Carrier constantly “ON” or “controlled by
RTS”; RTS/CTS delay set to no delay, 7
or 53 ms
1. Locate the “511/511E” toggle switch on the front panel of the unit
and move it UP. This activates the V.52 BER test mode and
transmits a “511” test pattern to the other unit. If any errors are
present, the receiving modem's red “ERROR” LED will blink
sporadically. Note: For this test to function, the “511” switch on
both 1080A Series units must be on.
Applications:
Indicators:
Point-to-point or multi-point
Bi-color LED indicators for TD, RD, RTS
& DCD; single LED indicators for Test
and Error
RTS Anti-stream Timer
Diagnostics:
12.5 sec., 50 sec., or disabled (switch
selectable); tolerance: +50%, -0
2. If the test indicates no errors are present, move the V.52 toggle
switch DOWN, activating the “511/E” test with periodic errors
present. If the test is working properly, the receiving modem’s red
“ERROR” LED will blink regularly. A successful “511/E” test will
confirm that the link is in place, and that the Model 1080A Series’
built-in “511” generator and detector are working properly.
V.52 compliant bit error rate pattern
(511/511E pattern) generator and
detector with error injection mode;
V.54 compliant—Local Analog Loopback
and Remote Digital Loopback, activated
by front panel switch or via RS-232
interface
5.5 POWER-DOWN
Transformer Isolation:
Surge Protection:
Temperature:
1500 V RMS
Turn off the Model 1080A Series by simply unplugging the AC
power adapter from the wall. There is no power switch.
Immune to IEC-801-5 Level 2, 1kV
0-50°C / 32-122°F
Humidity:
0-95%, non-condensing
6.2”w x 4.2”h x 1.5”l
Dimensions:
Power Supply (US):
Wall-mount; input: 120 V AC; output:
10-12 V AC
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APPENDIX C
APPENDIX B
PATTON MODEL 1080A SERIES CABLE RECOMMENDATIONS
PATTON MODEL 1080A SERIES FACTORY REPLACEMENT
PARTS AND ACCESSORIES
All Patton Electronics Company Short Range Modems are tested to the
distances published in our Catalogs and Specification Sheets on twisted-
pair cable with the following characteristics:
Patton Model #
Description
Wire Gauge
Capacitance
Resistance
080510ACB.....................120V Wall Mount AC Adapter
08059ACI ........................230V AC Adapter (No Power Cord)
07M1080A.......................Model 1080A Series User Manual
19 AWG(.9mm) 83nF/mi or 15.72 pF/ft.
22 AWG(.6mm) 83nF/mi or 15.72 pF/ft.
24 AWG(.5mm) 83nF/mi or 15.72 pF/ft.
26 AWG(.4mm) 83nF/mi or 15.72 pF/ft.
.0163Ω/ft.
.0326Ω/ft.
.05165Ω/ft.
.08235Ω/ft.
We fully expect that the Short Range Modems will operate on lines with
specifications different from those tested, but to reduce the potential
difficulties in the field, one should ensure that the cable being used has
similar or better characteristics (lower capacitance or lower resistance).
Wire with capacitance of 20pF/ft. or less is suitable for all our Short
Range Modems however, distances may vary from those published in our
catalog. Resistance will also affect distance but not functionality. Wire
should be 26 AWG (.4mm) or larger (smaller AWG#).
Patton products are designed to withstand normal environmental noise
and conditions however, other environmental factors too numerous to
discuss in this format may affect proper operation of the SRM’s.
Selection of the proper SRM for an application is critical to maintaining
Customer Satisfaction and should be taken seriously. Certain models are
better suited for particular applications and environments than others.
Model 1080A Distance Table in miles (km)
Data
AWG Wire Gauge (mm)
Rate (bps)
19 (.9)
22 (.6)
24 (.5)
26 (.4)
57,600
38,400
28,800
19,200
14,400
9,600
7,200
4,800
3,600
2,400
1,800
1,200
12.0(19.3) 7.0(11.2)
5.3(8.5)
4.0(6.4)
13.0(20.9) 7.5(12.1) 6.2(10.0) 4.2(6.8)
14.0(22.5) 8.0(12.9) 6.6(10.6) 4.6(7.4)
16.0(25.8) 8.5(13.7) 7.0(11.3) 5.1(8.2)
17.0(27.4) 11.0(17.7) 9.2(14.9) 6.5(10.5)
18.5(29.8) 13.0(20.9) 10.4(16.7) 7.5(12.1)
19.0(30.6) 13.5(21.7) 10.9(17.5) 8.0(12.9)
19.5(31.4) 14.0(22.5) 11.3(18.2) 8.8(14.2)
20.0(32.2) 14.5(23.3) 11.5(18.5) 8.8(14.2)
20.5(33.0) 15.0(24.2) 11.6(18.7) 9.0(14.5)
20.5(33.0) 15.0(24.2) 11.5(18.5) 8.9(14.3)
20.0(32.2) 15.0(24.2) 11.4(18.4) 8.9(14.3)
Model 1080A-64 Distance Table in miles (km)
Data
AWG Wire Gauge (mm)
Rate (bps)
19 (.9)
22 (.6)
24 (.5)
26 (.4)
64,000
32,000
16,000
11.0(17.7) 6.5(10.5)
13.5(21.7) 7.5(12.1) 6.4(10.3) 4.4(7.1)
16.5(26.6) 10.0(16.1) 8.4(13.5) 6.0(9.6)
5.0(8.1)
3.8(6.1)
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APPENDIX C
APPENDIX D
PATTON MODEL 1080A SERIES INTERFACE PIN ASSIGNMENT
PATTON MODEL 1080A SERIES BLOCK DIAGRAM
RS-232 FEMALE, D-SUB 25 CONNECTOR
(DCE ORIENTATION)
DIRECTION
STANDARD RS-232C/V.24 “DCE” SETTING
DIRECTION
1- (FG) Frame Ground
2- (TD) Transmit Data
3- (RD) Receive Data
4- (RTS) Request to Send
To 1080A
From 1080A
To 1080A
5- (CTS) Clear to Send
Analog Loop - 18
From 1080A
From 1080A
To 1080A
6- (DSR) Data Set Ready
7- (SG) Signal Ground
8- (DCD) Data Carrier Detect
From 1080A
To 1080A
To 1080A
Data Term. Ready (DTR) - 20
Digital Loop - 21
From 1080A
Test Mode - 25
Copyright © 1998
Patton Electronics Company
All Rights Reserved
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