Patton electronic 1080A-64 User Manual

USER
MANUAL

MODEL 1080A

Universal Synchro­nous & Asynchronous
Short Range Modem

CERTIFIED

An ISO-9001Certified

Company

Part# 07M1080A

Rev. E
Revised 7/2/12

SALES OFFICE
[phone]
TECHNICAL SUPPORT
[phone]

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

2

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

3

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 limite d to defects in workmanship or mate rial s, a nd doe s
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 damage s incurr ed by the use of this
product. These da mages incl ude, b ut ar e not limit ed to, t he fol lowi ng: los t
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 INTER FERENCE

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 Mode l 1080A Seri es has be en teste d and foun d
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 br anches).

-

-

-

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 Vo ltage Directive (LVD ) of the Euro pea n Unio n ( EU) . A Cer
tificate of Compliance is available by contacting Technical Support.

4

-

1.3 SERVICE

All warranty and non-warranty repairs must be returned freight prepaid
and insured to Patton Electro nic s. All retu rns mus t hav e a Ret urn M ate ri
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.

-

5

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 ques tion s or prob lem s ar ise dur ing i nstal lat ion o r us e of this pr od­uct, please do not hesitate to contact Patton Electronics Technical Sup­port 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 2­wire (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 syn chronous data .

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.

6

-

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 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 imped

­ance. The drawings, text and tables on the following pages describe all
switch locations, positions and functions.

FRONT

ON

ON

12345678

ON

12345678

ON

12345678

OFF

REAR

Figure 1. Underside of Model 1080A Series, showing location of DIP switches

S1

S2

S3

7

Each Model 1080 A Se ries SRM h as three sets of eight swit ch es, y iel ding
24 total DIP switches. The three sets will be referred to as S1, S2 and
S3. As
with respect to “ON” and “OFF” positions.

Figure 2 shows, the orientation of all DIP switches is the same

ON

12345678

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.

Tab le 1 : Model 1080A S1 Summ ar y

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

ON

OFF

9,600 bps
(1080A)

16,000 bps

}

(1080A-64)

Internal

}

or

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.

8

Shown in the tables below are DIP Switch settings for Model 1080A.

Tab l e 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

Switches S1-5 and S1-6: Clock Source

Switches S1-5 and S1-6 are se t in co mbination 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

9

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 opera
tion.

Table 3: S2 Summary

Position Function Factory Default

S2-1 Word Length Off
S2-2 Word Length Off
S2-3
S2-4 RTS/CTS Delay On
S2-5 RTS/CTS Delay On
S2-6 V .52/V.54 Tests Off
S2-7 2-Wire/4-Wire Off (4-Wire)
S2-8 Not Used N/A

Extended Signaling Rate

10 bits

}

Off -2.5% to 1%

7 ms

}

Normal Operation

-

10

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

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).

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 betw e en the time the unit “sees” RTS an d whe n i t s ends
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

11

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)

3.4 CONFIGURATION SWITCH SET “S3”

The DIP switches on S3 set the anti-stream control, local loopback
enable, remote loopb ack en able an d recei ve (inpu t) imped ance l evels for
the Model 1080A Series. Factory default positions of Switch S3 are
shown in

Table 4.

Table 4: S3 Summary

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

Switches S3-1 & S3-2: Input Impedance

The setting for Switches S3-1 and S3-2 determines the 1080A Series’
input impedance. This al lo ws you to ch oose the optimum imped ance s et
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

12

200 Ohms

}

Disabled

}

-

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.

S3-1 S3-2 Setting

On On 130 ohms
On Off 200 ohms
Off On 320 ohms
Off Off High impedance (minimum 2k¾)

Tab le 5: 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

1.8

320
320
320
320

2.4

200
320
320
320

Data Rates, kb/s

3.6

4.8

200

200

200

200

320

200

320

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

Switch S3-4: Mode Selection

The setting for switch S3 -4 allo ws th e user to choo se the approp riate s et­ting 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

13

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 co mb ina tio n 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

14

4.0 INSTALLATION

The Model 1080A Series operates in four twisted pair topologies: 2­wire/point-to-point, 2-wire/multipoint, 4-wire/point-to-point, and 4­wire/multipoint. In eac h of th ese t opo log ie s, the twi st ed p a ir w ire mus t 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 pan el of the Mo del 108 0A 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.

Made In the USA

RX+ RX- GND TX- TX+

12V, 2A

Figure 3. Rear view of Model 1080A Series - AC Power

Power

+ -

Figure 4. Rear view of Model 1080A Series - DC Power

RS-232 Interface (Female)

RX+ RX- GND TX- TX+

RS-232 Interface (Female)

Line

Made In the USA

Line

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.

15

-

Two-Wire Cable Connection Via RJ-45

e

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 guid e.

RJ-45 Signal

1 ------------------ NC
2 ------------------ GND†
3 ------------------ RCV
4 ------------------ XMT
5 ------------------ XMT
6 ------------------ RCV
7 ------------------ GND
8 ------------------ NC

† Connection to ground is optional

2. 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

3. AT&T standard modular color codes:

1 - Blue
2 - Orang
3 - Black
4 - Red
5 - Green
6 - Yellow
7 - Brown
8 - Slate

16

Two-Wire Cable Connection Via Terminal Blocks

}

ir

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 :

RX+ RX- GND TX- TX+

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. W e recommend connectin g the shield
at the computer end only to avoi d ground loop s. A ground wire is not
necessary for proper operation of these units.

5. When you finish connecti ng the tel ep hone line to units at both end s,
it should look like the following diagram:

XMT XMT
XMT XMT
GND GND

To Shield (Optional)

One Pa

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 108 0As for ea ch
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.

17

Four-Wire Cable Connection Via RJ-45

e

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.

RJ-45 Signal

1 ------------------ NC
2 ------------------ GND†
3 ------------------ RCV
4 ------------------ XMT
5 ------------------ XMT
6 ------------------ RCV
7 ------------------ GND
8 ------------------ NC

†Connection to ground is optional

2. Proper crossing of pairs between the two modems is as follows:

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

3. AT&T standard modular color codes:

18

1 - Blue
2 - Orang
3 - Black
4 - Red
5 - Green
6 - Yellow
7 - Brown
8 - Slate

Four-Wire Cable Connection Via Terminal Blocks

}

ir

ir

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:

RX+ RX- GND TX- TX+

* 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 Recei ve
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 on ly to avoid ground loop s. A ground w ire is not
necessary for proper operation of these units.

5. When you finish connec ting th e t elephone line to units at b oth ends,
it should look like the following diagram:

XMT RCV
XMT RCV
GG
RCV XMT
RCV XMT

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 con nec te d to several remote Model 1080As that a re
acting as slaves. Up to 25 Mode l 1080A Ser ies sla ves m ay be co nnecte d
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 continu­ally. Initiation of two-way communication is carrier-controlled by each
“slave” Model 1080A Series unit.

To Shield (Optional)

19

}

One Pa

One Pa

-

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 “control le d by RTS” (S1-8=ON).

Figure 5 illustrates a t ypi ca l

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 .

20

-

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

4.4 RS-232 CONNECTION

Connect the synchro nous or a synchron ous out put o f your RS-232 devic e
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:
[phone]; http://www.p atton.com; or support@patt on.com
for specific installation instructions.

21

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 t he units. This section desc ribe s 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 conditio n of the m odem and co mmun icatio n link . Figure 6 shows
the front panel location of each LED. Following Figure 6 is a description
of each LED’s function.

Model 1080 Universal Short Range Modem

V.54 Test

Modes

Test

TD RD

RTS

Figure 6. Front view of Model 1080A Series

CD

Error

511

511E

Remote
Normal
Local

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.

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.

The “Test” Indicator

The green “Test” LED indicates that V.52 or V.54 tests are running.

22

The “Error” Indicators

The “Error” indicator LED has three functions:

1. When the 1080A Series unit is in te st mod e (g reen “T es t” LE D is li t),
the error LED glows red when bit errors occur.

2. 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.

3. The “Error” LED is also used to detect line quality, such:
— The improper use of flat (non-twisted p ai r) cab le to co nne ct the

modems.
— One or more broken wire in the 4 wire twisted pair cable.
— The use of low quality twisted pair cable to connect the

modems.
— 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.

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 200¾. (S3-1 “On”, S3-2
“Off”).

3. For Model 1080A, set data rate on both modems for 9.6 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.

Reading The Test

23

1. 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.

2. 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.

3. If one wire from the 4 wire twisted p air is br oken “Error” L ED 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 anti­stream circuit will force RTS low. The “Error” LED will light red, indicating a
streaming condition (RTS continua lly on). This fea tu re preve nt s a m alfunc
tioning terminal from tying-up a computer port in a multi-drop or polling
environment. When the DTE drops RTS, the anti-streaming timer is auto
matically 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, and then into
an acceptable AC power outlet. There is no power switch on the Model
1080A; and the remote/normal/loopback switch should be set to “nor
mal”. When the local and remote Model 1080As 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

24

-

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.

Local Analog Loopback (LAL)

The Local Analog Loopback (LAL) test checks the operation of the local
Model 1080 A S eri e s u n it, a nd i s pe r for m ed separ a te ly on e a ch uni t . A ny
data sent to the local Model 1080A 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:

1. Activate LAL. This may be done in one of two w ays: First, by mo ving
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 i s
OFF, and DIP switch S3-5 is ON). Once LAL is activate d, the Model
1080A Series’ transmit output is connected to its own receiver. The
"test" LED should be lit.

2. Verify that the da ta term inal e quipment is op erating p roperly a nd can
be used for a test. If a fault is indicated, call a technician or replace
the unit.

3. Perform a BER (bit error rate) test on each unit. If the BER test
equipment indic ates no fa ult s, but th e dat a te rminal i ndica tes a fault,
follow the manufactur er's checko ut procedu res for the dat a terminal.
Also, check the RS-232 interface cable between the terminal and
the Model 1080A.

Remote Digital Loopback (RDL)

The Remote Digital Loopba ck (RD L) test che cks th e performan ce of bo th
the local and remote Model 1080As, and the communication link
between them. Any characters sent to the remote 1080A in this test
mode will be returned back to the originating device. For example, char

­acters typed on the keyboa rd of the local ter minal will ap pear on the local
terminal s creen after having been passed to the remote Model 1080A
and looped back. To perform an RDL test, follow these steps:

1. Activate RDL. This may be done in two ways: First, by moving the

front panel toggle swi tch UP to "Remote". Second, by raising pin 21
on the RS-232 interface.

25

Note Make sure DIP switch S3-6 is ON; and DIP switch S2-6 is OFF.

2. Perform a BER (bit error rate) test on the system.

3. 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 con

-

nections and continuity.

Using the V.52 BER Test Independently

The V.52 BER test can be us ed ind epend ently of the V.54 loopback test s .
This requires two operators: one to initiate and monitor the test at the
local 1080A, and one at the remote 1080A. To use the V.52 BER test by
itself, both operators should simultaneously follow these steps:

1. Locate the “511/5 11E” toggle switch on the front pa nel 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 con
firm that the link is in pla ce, and t hat the M odel 1080 A Series’ b uilt-in
“511” generator and detector are working properly.

-

5.5 POWER-DOWN

Turn off the Model 1080A Series by simply unplugging the AC or DC
power sourc e from the wall. There is no power switch.

26

APPENDIX A

SPECIFICATIONS

A.1 TRANSMISSION FORMAT

Synchronous or asynchronous, 2-wire/half duplex, or 4-wire/full or half
duplex

A.2 INTERFACE

RS-232 (CCITT V.24) connection via DB-25 female; twisted pair connec­tion via RJ-45 or terminal block

A.3 TRANSMISSION LINE

2 or 4-wire UTP, 19 - 24 AWG

A.4 DATA RATES

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

A.5 CLOCKING

Internal, external or receive recover

A.6 CONTROLS

Carrier constantly “ON” or “controlled by RTS”; RTS/CTS delay set to no
delay, 7 or 53 ms

A.7 APPLICATIONS

Point-to-point or multi-point

A.8 INDICATORS

Bi-color LED indicators for TD, RD, RTS & DCD; single LED indicators
for Test and Error

A.9 RTS ANTI-STREAM TIMER

12.5 sec., 50 sec., or disabled (switch selectable); tolerance: +50%, -0%

27

A.10 DIAGNOSTICS

V.52 compliant bit error rate pattern (511/511E pattern) generator and
detector with error injection mode; V.54 compliant—Local Analog Loop
back and Remote Digi tal Loopback, activated by front p anel switch or via
RS-232 interface

A.11 TRANSFORMER ISOLATION

1500 V RMS

A.12 SURGE PROTECTION

Immune to IEC-801-5 Level 2, 1kV

A.13 TEMPERATURE

32–122°F (0–50°C)

A.14 HUMIDITY

0–95%, non-condensing

A.15 DIMENSIONS

6.2W x 4.2H x 1.5L in. (15.7W x 10.7H x 3.8L cm)

A.16 POWER INPUT (US)

12, 24, or 48 VDC

-

AC

28

APPENDIX B

FACTORY REPLACEMENT PARTS AND ACCESSORIES

Patton Model # Description

PS-03671H1-002 AC/DC Universal Wall Mount Adapter - 12V, 2A
12-132 AUS Plug
12-131 UK Plug
12-130 EU Plug
12-129 NA Plug
07M1080A Model 1080A Series User Manual

29

APPENDIX C

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:

Wire Gauge Capacitance Resistance

19 AWG(.9mm) 83nF/mi or 15.72 pF/ft. .0163¾/ft.
22 AWG(.6mm) 83nF/mi or 15.72 pF/ft. .0326¾/ft.
24 AWG(.5mm) 83nF/mi or 15.72 pF/ft. .05165¾/ft.
26 AWG(.4mm) 83nF/mi or 15.72 pF/ft. .08235¾/ft.

We fully expect that the Short Range Modems will operate on lines with
specifications different from those tested, but to redu ce the p ote ntial diffi
culties 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 Modem s however, distances may vary from those pu blished 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 Satisf ac tion a nd sh ould be taken seriously. Certain m od els a r e
better suited for particular applicat ions and environments than others.

Model 1080A Distance Table in miles (km)

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)

19 (.9) 22 (.6) 24 (.5) 26 (.4)

AWG Wire Gauge (mm)

30

APPENDIX D

INTERFACE PIN ASSIGNMENT

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 To 1080A
3- (RD) Receive Data From 1080A
4- (RTS) Request to Send To 1080A

To 1080A Analog Loop - 18

To 1080A Data Term. Ready (DTR) - 20
To 1080A Digital Loop - 21

From 1080A Test Mode - 25

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

31

APPENDIX E

PATTON MODEL 1080A SERIES BLOCK DIAGRAM

Copyright © 1998, 2012.

Patton Electronics Company

All Rights Reserved.

32