Page 1
USER
MANUAL
MODEL 1080A and
MODEL 1080A-64
Universal Synchronous &
Asynchronous
Short Range Modems
Part #07M1080A-D
Doc. #072041UD
Revised 6/19/98
CERTIFIED
An ISO-9001
Certified Company
SALES OFFICE
(301) 975-1000
TECHNICAL SUPPORT
(301) 975-1007
http://www.patton.com
Page 2
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 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 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 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 1080A Series 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 Patton
Technical Support.
1
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 Service at:
tel: (301) 975-1007;
email: support@patton.com; or,
www: 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
Model 1080A Series. Technical Service hours: 8AM to 5PM EST,
Monday through Friday.
2
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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 product, please do not hesitate to contact Patton Electronics
Technical Support at (301) 975-1007.
2.1 FEATURES
• 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)
• 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 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.
The Model 1080A Series has several features to enhance overall
performance: automatic equalization, automatic gain control, antistreaming 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.
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
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 or 1080A64 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
applications. These 24 DIP switches are grouped into three eightswitch 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
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.
4
FRONT
REAR
Figure 1. Underside of Model 1080A Series, showing location of DIP switches
S1
S2
S3
ON
OFF
ON
12345678
ON
12345678
ON
12345678
Page 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.
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.
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 and
1080A-64.
5
MODEL 1080A S1 SUMMARY TABLE
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
}
}
Figure 2. Close-up of DIP switches showing “ON” and “OFF” positions
12345678
ON
OFF
ON
Shown in the tables below are DIP Switch settings for Models
1080A and 1080A-64.
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.
S1-5 S1-6 Setting
On On Internal transmit clock
Off On Receive recover clock
On Off External transmit clock
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 Setting
On Asynchronous
Off Synchronous
6
S1-1 S1-2 S1-3 S1-4 Setting
Off On Off On 16 kbps
Off Off Off On 32 kbps
Off On On Off 64 kbps
DATA RATE SETTINGS - MODEL 1080A-64
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
MODEL 1080A DATA RATE SETTINGS
Page 5
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.
S1-8 Setting
Off Constantly on
On Controlled by RTS
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
operation.
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.
S2-1
S2-2 Setting
Off On 8 bits
On On 9 bits
Off Off 10 bits
On Off 11 bits
7
S2 SUMMARY TABLE
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
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 variance from a given frequency level the Model 1080A Series
will tolerate).
S2-3 Setting
Off -2.5% to +1%
On -2.5% to +2.3%
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.
S2-4 S2-5 Setting
On On 7 ms
Off On 53 ms
On Off No delay
Off Off No delay
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.
S2-6 Setting
Off V.54 Normal Operation
On V.54 Testing Disabled
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.
S2-7 Setting
Off 4-wire (full or half duplex)
On 2-wire (half duplex only)
8
Page 6
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 the table below.
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 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.
S3-1
S3-2 Setting
On On 130 Ohms
On Off 200 Ohms
Off On 320 Ohms
Off Off High impedance (minimum 2kΩ)
9
S3 SUMMARY TABLE
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
}
}
Switch S3-4: Mode Selection
The setting for switch S3-4 allows the user to choose the
appropriate setting for point-to-point or multipoint applications.
S3-4 Setting
On Point-to-point
On Multipoint application as “Master”
Off Multipoint application as “Slave”
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.
S3-5 Setting
On RS-232 initiation enabled
Off RS-232 initiation disabled
10
S3-1, S3-2 SELECTION TABLE FOR MODEL 1080A
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
S3-1, S3-2 SELECTION TABLE FOR MODEL 1080A-64
Gauge of
Cable
19AWG/.9mm
22AWG/.6mm
24AWG/.5mm
26AWG/.4mm
16
130
200
200
200
Data Rates, kb/s
32
130
130
130
200
64
130
130
130
130
Page 7
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.
S3-6 Setting
On RS-232 initiation enabled
Off RS-232 initiation disabled
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 S3-8 Setting
Off Off Disabled
Off On 12.5 seconds
On Off 50.0 seconds
On On 12.5 seconds
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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 (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.
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 pointto-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
Figure 3. Rear view of Model 1080A Series
RS-232 Interface (Female)
Made In the USA
LinePower
Powered Short Range
Modem
RX+ RX- GND TX- TX+
Page 8
4.1.1 Two-Wire Cable Connection Via RJ-45
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.
RJ-45
SIGNAL
1 -------------NC
2 -------------GND
†
3 -------------RCV
4 -------------XMT
5 -------------XMT
6 -------------RCV
7 -------------GND
8 -------------NC
†
Connection to ground is optional
B. Proper wiring of pairs between the two modems is as follows:
SIGNAL
PIN# COLOR* COLOR PIN# SIGNAL
XMT 4 Green ------------Green 4 XMT
XMT 5 Red---------------Red 5 XMT
*Standard color codes—yours may be different
C. AT&T standard modular color codes:
13
1 - Blue
2 - Orange
3 - Black
4 - Red
5 - Green
6 - Yellow
7 - Brown
8 - Slate
4.1.2 Two-Wire Cable Connection Via Terminal Blocks
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:
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.
C. Connect the other wire of the pair to the other Transmit lug on
both the local and remote Model 1080A or 1080A/64.
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.
E. 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 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.
14
RX+ RX- GND TX- TX+
XMT XMT
XMT XMT
GND GND
To Shield (Optional)
}
One Pair
Page 9
4.2.1 Four-Wire Cable Connection Via RJ-45
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.
RJ-45
SIGNAL
1 -------------NC
2 -------------GND
†
3 -------------RCV
4 -------------XMT
5 -------------XMT
6 -------------RCV
7 -------------GND
8 -------------NC
B. Proper crossing of pairs between the two modems is as follows:
†
Connection to ground is optional
SIGNAL PIN# COLOR* COLOR PIN# SIGNAL
GND
†
2 Orange ----------Brown 7 GND
RCV 3 Black -------------Green 5 XMT
XMT 4 Red---------------Yellow 6 RCV
XMT 5 Green ------------Black 3 RCV
RCV 6 Yellow------------Red 4 XMT
GND 7 Brown ------------Orange 2 GND
*Standard color codes—yours may be different
†
Connection to ground is optional
C. AT&T standard modular color codes:
15
1 - Blue
2 - Orange
3 - Black
4 - Red
5 - Green
6 - Yellow
7 - Brown
8 - Slate
4.2.2 Four-Wire Cable Connection Via Terminal Blocks
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:
* 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.
C. Connect the other pair of wires in the telephone cable to the
Receive lugs (RX+ and RX-) on the terminal block.
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.
E. When you finish connecting the telephone line to units at both
ends, it should look like the following diagram:
16
XMT RCV
XMT RCV
GG
RCV XMT
RCV XMT
To Shield (Optional)
}
One Pair
}
One Pair
RX+ RX- GND TX- TX+
Page 10
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/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.
In a multipoint environment the master Model 1080A or 1080A-64
transmits continually. Initiation of two-way communication is carriercontrolled 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.
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
Figure 4. Typical multipoint set-up
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:
(301) 975-1007; http://www.patton.com; or, support@patton.com
for specific installation instructions.
18
HOST FIRST SLAVE SECOND SLAVE
XMT RCV
RCV
XMT RCV
RCV
RCV XMT
XMT
RCV XMT
XMT
HOST FIRST SLAVE SECOND SLAVE
XMT XMT
XMT
XMT XMT
XMT
Page 11
5.1.4 The “Error” Indicators
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.
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.
3. The use of low quality twisted pair cable to connect the
modems.
4. Broken or corroded connector.
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.
5.1.4.1 Setting Up The “Error” LED To Test Cable Quality
If there is any question as to the quality of your line we recommend
the following test:
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,
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.
4. On local modem set “Carrier Constantly On”. (S1-8 “Off”)
5. Set remote modem to RTS control (S1-8, “On”).
6. Place both front panel toggle switches to neutral position.
(Test Led will not light)
7. Connect both modems to the 4 wire twisted pair cable.
20
5.0 OPERATION
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.
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.
5.1.1 The “TD” and “RD” Indicators
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.
5.1.2 The “RTS” and “CD” Indicators
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.
5.1.3 The “Test” Indicator
The green “Test” LED indicates that V.52 or V.54 tests are running.
19
Figure 5. Front view of Model 1080A Series
Model 1080 Universal Short Range Modem
TD RD
RTS
CD
V.54 Test
Modes
Remote
Normal
Local
Error
Test
511
511E
Page 12
5.1.4.2 Reading The Test
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.
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.
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.
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
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.
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:
• TD & RD = flashing red and green
• RTS & DCD = green
• TEST = off
21
5.4 V.54 TEST MODES
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.
5.4.1 Local Analog Loopback (LAL)
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:
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.
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.
5.4.2 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:
22
Page 13
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).
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.
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:
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.
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.
5.5 POWER-DOWN
Turn off the Model 1080A Series by simply unplugging the AC
power adapter from the wall. There is no power switch.
23
24
APPENDIX A
PATTON MODEL 1080A SERIES SPECIFICATIONS
Transmission Format: Synchronous or asynchronous, 2-
wire/half duplex, or 4-wire/full or half
duplex
Interface: RS-232 (CCITT V.24) connection via
DB-25 female; twisted pair connection
via RJ-45 or terminal block
Transmission Line: 2 or 4-wire UTP, 19 - 24 AWG
Data Rates: 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;
Model 1080A-64 - Synchronous or
asynchronous at 16, 32, and 64
kbps—switch selectable
Clocking: Internal, external or receive recover
Controls: Carrier constantly “ON” or “controlled by
RTS”; RTS/CTS delay set to no delay, 7
or 53 ms
Applications: Point-to-point or multi-point
Indicators: Bi-color LED indicators for TD, RD, RTS
& DCD; single LED indicators for Test
and Error
RTS Anti-stream Timer 12.5 sec., 50 sec., or disabled (switch
selectable); tolerance: +50%, -0
Diagnostics: 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
Transformer Isolation: 1500 V RMS
Surge Protection: Immune to IEC-801-5 Level 2, 1kV
Temperature: 0-50°C / 32-122°F
Humidity: 0-95%, non-condensing
Dimensions: 6.2”w x 4.2”h x 1.5”l
Power Supply (US): Wall-mount; input: 120 V AC; output:
10-12 V AC
Page 14
APPENDIX B
PATTON MODEL 1080A SERIES FACTORY REPLACEMENT
PARTS AND ACCESSORIES
Patton Model #
Description
080510ACB.....................120V Wall Mount AC Adapter
08059ACI ........................230V AC Adapter (No Power Cord)
07M1080A.......................Model 1080A Series User Manual
25
APPENDIX C
PATTON MODEL 1080A SERIES CABLE RECOMMENDATIONS
All Patton Electronics Company Short Range Modems are tested to the
distances published in our Catalogs and Specification Sheets on twistedpair cable with the following characteristics:
W
ire Gauge Capacitance Resistance
19 AWG(.9mm) 83nF/mi or 15.72 pF/ft. .0163Ω/ft.
22 AWG(.6mm) 83nF/mi or 15.72 pF/ft. .0326Ω/ft.
24 AWG(.5mm) 83nF/mi or 15.72 pF/ft. .05165Ω/ft.
26 AWG(.4mm) 83nF/mi or 15.72 pF/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.
26
Data
Rate (bps)
57,600 12.0(19.3) 7.0(11.2) 5.3(8.5) 4.0(6.4)
38,400 13.0(20.9) 7.5(12.1) 6.2(10.0) 4.2(6.8)
28,800 14.0(22.5) 8.0(12.9) 6.6(10.6) 4.6(7.4)
19,200 16.0(25.8) 8.5(13.7) 7.0(11.3) 5.1(8.2)
14,400 17.0(27.4) 11.0(17.7) 9.2(14.9) 6.5(10.5)
9,600 18.5(29.8) 13.0(20.9) 10.4(16.7) 7.5(12.1)
7,200 19.0(30.6) 13.5(21.7) 10.9(17.5) 8.0(12.9)
4,800 19.5(31.4) 14.0(22.5) 11.3(18.2) 8.8(14.2)
3,600 20.0(32.2) 14.5(23.3) 11.5(18.5) 8.8(14.2)
2,400 20.5(33.0) 15.0(24.2) 11.6(18.7) 9.0(14.5)
1,800 20.5(33.0) 15.0(24.2) 11.5(18.5) 8.9(14.3)
1,200 20.0(32.2) 15.0(24.2) 11.4(18.4) 8.9(14.3)
Model 1080A Distance Table in miles (km)
AWG Wire Gauge (mm)
19 (.9) 22 (.6) 24 (.5) 26 (.4)
Data
Rate (bps)
64,000 11.0(17.7) 6.5(10.5) 5.0(8.1) 3.8(6.1)
32,000 13.5(21.7) 7.5(12.1) 6.4(10.3) 4.4(7.1)
16,000 16.5(26.6) 10.0(16.1) 8.4(13.5) 6.0(9.6)
Model 1080A-64 Distance Table in miles (km)
AWG Wire Gauge (mm)
19 (.9) 22 (.6) 24 (.5) 26 (.4)
Page 15
APPENDIX C
PATTON MODEL 1080A SERIES INTERFACE PIN ASSIGNMENT
RS-232 FEMALE, D-SUB 25 CONNECTOR
(DCE ORIENTATION)
1- (FG) Frame Ground
2- (TD) Transmit Data To 1080A
3- (RD) Receive Data From 1080A
4- (RTS) Request to Send To 1080A
5- (CTS) Clear to Send From 1080A
6- (DSR) Data Set Ready From 1080A
7- (SG) Signal Ground
8- (DCD) Data Carrier Detect From 1080A
To 1080A Analog Loop - 18
To 1080A Data Term. Ready (DTR) - 20
To 1080A Digital Loop - 21
From 1080A Test Mode - 25
DIRECTION STANDARD RS-232C/V.24 “DCE” SETTING DIRECTION
27
APPENDIX D
PATTON MODEL 1080A SERIES BLOCK DIAGRAM
Copyright © 1998
Patton Electronics Company
All Rights Reserved
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