Patton electronics 1090 Bedienungsanleitung

USER

MANUAL

MODEL 1090

High Speed Synchronous

Short Range Modem

SALES OFFICE

(301) 975-1000

TECHNICAL SUPPORT

(301) 975-1007

http://www.patton.com

Part# 07M1090-B

Doc# 032011UB

Revised 5/26/98

CERTIFIED

An ISO-9001

Certified Company

Dear Valued Customer,

Thank you for purchasing Patton Electronics products! We do

appreciate your business. I trust that you find this user manual helpful.

We manufacture one of the widest selections of data communications

products in the world including CSU/DSU's, network termination units,

powered and self-powered short range modems, fiber optic modems, interface

converters, baluns, electronic data switches, data-line surge protectors,

multiplexers, transceivers, hubs, print servers and much more. We produce

these products at our Gaithersburg, MD, USA, facility, and can custom

manufacture products for your unique needs.

We would like to hear from you. Please contact us in any of the

following ways to tell us how you like this product and how we can meet your

product needs today and in the future.

Web: http:www.patton.com

Sales E-mail: [email protected]

Support E-mail: [email protected]

Phone - Sales (301) 975-1000

Phone - Support (301) 975-1007

Fax: (301) 869-9293

Mail: Patton Electronics Company

7622 Rickenbacker Drive

Gaithersburg, MD 20879 USA

We are committed to a quality product at a quality price. Patton

Electronics is BABT and ISO 9001 certified. We meet and exceed the highest

standards in the industry (CE, UL, etc.).

Please contact us and let us know how we may provide you with the

answers to your needs.

Thank you.

Burton A.Patton

Vice President

P.S. Please tell us where you purchased this product.

_________________________________________________________

1.0 WARRANTY INFORMATION

Patton Electronics warrants all Model 1090 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 1090 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 1090 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 1090

does cause interference to radio or television reception, which can be

determined by removing power from the unit, 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 Technical

Support.

1.2 SERVICE

All warranty and non-warranty repairs must be returned freight

prepaid and insured to Patton Electronics. All returns must have a

Return Materials Authorization number on the outside of the shipping

container. This number may be obtained from Patton Electronics

Technical Service at

telephone: (301) 975-1007,

web address: http://www.patton.com;

email: [email protected].

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 1090. Technical Service hours: 8AM to 5PM EST, Monday

through Friday.

2.0 GENERAL INFORMATION

Thank you for your purchase of this Patton Electronics product.

This product has been thoroughly inspected and tested and is

warranted for One Year parts and labor. If any questions or problems

arise during installation or use of this product, please do not hesitate to

contact Patton Electronics Technical Support at (301) 975-1007.

2.1 FEATURES

• Synchronous data rates of 48, 56, 64, 72, 80, 112, 128, 144

and 160 kbps

• Frequency Shift Key (FSK) modulation

• Full or half duplex operation over two twisted pair (4-wire)

• Point-to-point distances up to 11 miles (19 AWG @ 56 kbps)

• V.54 compliant local analog (LAL), remote digital (RDL) and local

digital loopback tests

• V.52 compliant Bit Error Rate (BER) test pattern generator

• Replaceable DTE-DCE QuickConnect™ interface modules

• V.52 compliant BER test pattern generator

• Internal, external or receive recovered clocking options

• Automatic equalization

• Made in the U.S.A.

2.2 DESCRIPTION

The Patton Model 1090 Synchronous Short Range Modem

is designed for point-to-point, high speed communication over 4-wires

(two twisted pair). Supporting switch-selectable data rates from 48 to

160 kbps, the Model 1090 is perfect for connecting two bridge/routers,

or for similar campus applications at distances up to 11 miles. The

Model 1090 incorporates built-in V.54 loopback tests, a V.52 BERT

pattern generator and seven front panel LED indicators. Data integrity

is enhanced by automatic equalization and gain control. The Model

1090 also incorporates transformer isolation and surge protection to

guard data and connected equipment against the hazards of ground

loops and transient surges. Clocking options include internal, external

and receive recover clock.

The Model 1090 is the first Patton product to feature replaceable DCE-

DTE QuickConnect™ interface modules. Several different modules are

available (call Patton Sales for details). Line connection is made by RJ-

45 jack. Internal AC power supply options include 120 or 230VAC

(switchable), 85-256VAC (universal) or 48VDC.

3.0 CONFIGURATION

The Model 1090 is equipped with one set of eight DIP switches,

and one set of four DIP switches (all externally accessible). These DIP

switches allow configuration of clock source, carrier control, loopback

tests and data rate. This section describes switch locations and

explains all possible configurations.

3.1 EXTERNAL DIP SWITCH SETTINGS

The Model 1090’s DIP switches are located on the underside of

the unit (see Figure 1, below). Figure 2 (below), shows the orientation

of the switch set. All possible settings for the Model 1090’s DIP

switches are presented in the summary table and descriptions on the

following pages. If you have additional questions regarding

configuration, contact Patton Technical Support at (301) 975-1007.

Figure 2. Close Up of Configuration Switches

1234

12345678

1234

Figure 1. Underside of Model 1090 Wish External DIP Switch Locations

S1 S2

FRONT

REAR

S1 S2

SWITCH SET S1

The configuration switches on S1 set clock source, RTS/CTS

delay, carrier control, loopback tests. The default settings are

summarized in Figure 3 (above).

S1-1 and S1-2: Clock Source

Switches S1-1 and S1-2 are set in combination to determine the

source of timing for the Model 1090.

S1-1 S1-2 Setting

On On Internal

On Off Receive recover

Off On External transmit clock

Off Off Not a valid setting

NOTE: When an X.21 QuickConnect™ module is installed in

one or both base units, one base unit must be configured for

receive recover clock source. The particular application will

dictate which unit must be configured for receive recover clock

source.

S1-3: RTS/CTS Delay

Switch S1-3 determines the amount of delay between the time RTS

is activated and the 1090 activates the CTS.

S1-3 Function

On Short delay (4-9 msec)

Off Long delay (33-71 msec)

S1-4: LDL Control

Switch S1-4 determines whether the front panel switch can activate

a Local Digital Loopback (LDL) diagnostic test.

S1-4 Function

On LDL Control Enabled

Off LDL Control Disabled

S1-5: Carrier Control

The setting for switch S1-5 determines whether the carrier is

“constantly on” or “controlled by RTS”. This setting allows for operation

in switched carrier or hardware handshaking applications.

S1-5 Setting

On Controlled by RTS

Off Constantly ON

S1-6: DTE Control of RDL

The setting for switch S1-6 determines whether DTE control of

remote-digital loopback test is enabled or disabled. If DTE control is

disabled, the RDL test can only be initiated by the front panel switch.

S1-6 Setting

On DTE control enabled

Off DTE control disabled

S1-7: DTE Control of LAL

The setting for switch S1-7 determines whether DTE control of

local analog loopback test is enabled or disabled. If DTE control is

disabled, the LAL test can only be initiated by the front panel switch.

S1-7 Setting

On DTE control enabled

Off DTE control disabled

S1 SUMMARY TABLE

Position Function Factory Default

S1-1 Clock Source* On

S1-2 Clock Source* On

S1-3 RTS/CTS Delay On Short Delay

S1-4 LDL Control Off Disabled

S1-5 Carrier Control Off Constant

S1-6 DTE Control of RDL Off Disabled

S1-7 DTE Control of LAL Off Disabled

S1-8 V.54 Enable/Disable Off Enabled

*See Note in SWITCH SET S1 (Below) for X.21 Clock Sources

Figure 3. Summary of DIP Switch Default Settings for S1

}

Internal

S1-8: V.54 Enable / Disable

The setting for switch S1-8 determines whether the Model 1090 will

respond when it receives the V.54 sequence. If you suspect the Model

1090 may be getting tricked into the loopback test by false detection of

user data, you can try setting this to “Disable.”

S1-8 Setting

On Disabled

Off Enabled

SWITCH SET S2

The settings for DIP switches S2-1 through S2-4 determine the

synchronous data rate of the Model 1090. All possible settings

(including the default) are shown below:

S2-1 S2-2 S2-3 S2-4 Setting

Off Off Off On 48 kbps

Off Off On Off 56 kbps

Off Off On On *64 kbps

Off On Off Off 72 kbps

Off On Off On 80 kbps

Off On On Off 112 kbps

Off On On On 128 kbps

On Off Off Off 144 kbps

On Off Off On 160 kbps

* Default Setting

7 8

4.0 INSTALLATION

Once the Model 1090 is properly configured, it is ready to connect

to the twisted pair interface, to the serial port, and to the power source.

This section tells you how to make these connections.

4.1 CONNECTION TO THE TWISTED PAIR INTERFACE

The Model 1090 supports communication between two terminal

devices at distances to 11 miles and data rates to 160 kbps. There are

two essential requirements for installing the Model 1090:

1. These units work in pairs. Therefore, you must have one

Model 1090 (or a compatible model) at each end of a two

twisted pair interface.

2. To function properly, the Model 1090 needs two twisted pairs

of metallic wire. These twisted pairs must be

unconditioned, dry, metallic wire, between 19 and 26 AWG

(the higher number gauges may limit distance somewhat).

Standard dial-equalization equipment, or standard, flat

modular telephone type cable, are not acceptable.

4.1.1 TWISTED PAIR CONNECTION USING RJ-45

The Model 1090 uses a modular RJ-45 jack for twisted pair line

connection. The signal/pin relationships are shown below:

RJ-45 SIGNAL

1..........................XMT+

2..........................XMT-

3..........................N/C

4..........................GND*

5..........................GND*

6..........................N/C

7..........................RCV+

8..........................RCV-

*Connection to ground is optional

When connecting two Model 1090’s, it is necessary to use a crossover

cable. The diagram below shows how a crossover cable should be

constructed.

RJ-45 Cable (4-Wire)

SIGNAL PIN# PIN# SIGNAL

XMT+ 1-----------------------8 RCV-

XMT- 2-----------------------7 RCV+

GND* 4-----------------------5 GND*

GND* 5-----------------------4 GND*

RCV+ 7-----------------------2 XMT-

RCV- 8-----------------------1 XMT+

*Connection to ground is optional

4.2 CONNECTION TO THE SERIAL PORT

The serial port interface on the Model 1090 uses interchangeable

Quick Connect Modules. Each Quick Connect Module has a 50-pin

card edge connector on one side and a serial port interface on the

other. Figure 4 (below) shows how a Quick Connect™ Module plugs

into the back of the Model 1090.

4.2.1 CHANGING QUICKCONNECT™ MODULES

When you purchase a particular version of the Model 1090, it

should be shipped to you with the appropriate QuickConnect™ Module

already installed. If you need to install a different QuickConnect™

Module, follow these steps.

Removing the Existing QuickConnect™ Module

1. Turn the power switch off. Leave the power cord plugged into a

grounded outlet to keep the unit grounded.

2. Loosen the two thumbscrews on the module by turning them

counterclockwise.

3. Grasp the two thumbscrews and gently pull the module from the

unit. Apply equal force to the thumbscrews to keep the module

straight during the removal process.

Installing the New QuickConnect™ Module

1. Make sure the power switch is off. Leave the power cord

plugged into a grounded outlet to keep the unit grounded.

2. Hold the module with the faceplate toward you and align the

module with the guide slots in the rear panel of the Model 1090.

3. While keeping the module’s faceplate parallel with the Model

1090 rear panel, slide the module straight in–so that the card

edge contacts line up with the socket inside the chassis.

Note: The card edge connector should meet the socket when it

is almost all the way into the chassis. If you encounter a lot of

resistance, remove the module and repeat Steps 2 and 3.

4. With the card edge contacts aligned with the socket, firmly seat

the module by using your thumbs to apply pressure directly to

the right and left edges of the module faceplate. Applying

moderate and

even

pressure should be sufficient to seat the

module. You should hear it snap into place.

5. To secure the module in place, push the thumbscrews into the

chassis and turn the screws clockwise to tighten.

0 OFF

1 ON

Line

Interface Port

Figure 4. Installation of Model 1090 Plug-in Serial Interface Module

4.2.2 CONNECTION TO A “DTE” DEVICE

The serial port on most QuickConnect™ interface modules (all

except the X.21 module) is hard-wired as a DCE. Therefore these

modules “want” to plug into a DTE such as a terminal, PC or host.

When making the connection to your DTE device, use a straight

through cable of the shortest possible length—we recommend 6 feet or

less. When purchasing or constructing an interface cable, please refer

to the pin diagrams in Appendix D as a guide.

4.2.3 CONNECTION TO A “DCE” DEVICE

If the Model 1090’s QuickConnect™ interface module is hard-wired

as a DCE (all except the X.21 module), you must use a

null modem

cable when connecting to a printer, modem, multiplexer or other DCE

device. This cable should be of the shortest possible length—we

recommend 6 feet or less. When purchasing or constructing a null

modem interface cable, use the pin diagrams in Appendix D as a guide.

Note:Pin-out requirements for null modem applications vary

widely between manufacturers. If you have any questions

about a specific application, contact Patton Technical Support:

(301) 975-1007; http://www.patton.com; or,

[email protected].

4.2.4 RECONFIGURING THE X.21 QUICKCONNECT™ MODULE

The serial port on the X.21 QuickConnect™ Module is default wired

as a DCE, but may be switched to a DTE. This is done by reversing the

orientation of the DCE/DTE strap, as described below:

To reverse DCE/DTE orientation, remove the module according to

the instructions in Section 4.2.1. The DCE/DTE strap is located on the

bottom side of the module’s PC board. The arrows on the top of the

strap indicate the configuration of the X.21 port (for example, if the DCE

arrows are pointing toward the DB-15 connector, the X.21 port is wired

as a DCE). Reverse the DCE/DTE orientation by pulling the strap out of

its socket, rotating it 180º, then plugging the strap back into the socket.

You will see that the DCE/DTE arrows now point in the opposite

directions, showing the new configuration of the X.21 port. Reinstall the

module according to the instructions in Section 4.2.1.

4.3 CONNECTION TO THE POWER SOURCE

The Model 1090 is available with three power supply options:

The Standard power supply option (Model 1090 or 1090-230) is

factory configured for either 115 or 230 VAC, depending on how the

product is ordered, and is available with a variety of domestic and

international power cords (see Appendix C).

The Universal Interface power supply option (Model 1090-UI)

operates in environments ranging from 85 to 265 VAC, with no re-

configuration necessary (see Appendix C for available domestic and

international power cords).

The DC power supply option (Model 1090-DC) operates in 48 VDC

environments and is equipped with a 3-pin terminal block with spring-

type contacts (please refer to the Model 1090 Service Manual for wiring

instructions).

4.3.1 AC POWER CONNECTION

The two AC power supply options–Standard and Universal–are

equipped with a male IEC-320 power connection. A domestic (US)

power supply cord is supplied with the unit at no extra charge. To

connect the standard or universal power supply, follow these steps:

1. Attach the power cord (supplied) to the shrouded male IEC-320

connector on the rear of the Model 1090.

2. Plug the power cord into a nearby AC power outlet.

3. Turn the rear power switch ON.

WARNING! There are no user-serviceable parts in the power

supply section of the Model 1090. Voltage setting changes and

fuse replacement should only be performed by qualified service

personnel. Any questions may be answered by contacting

Patton Electronics Technical support at (301) 975-1007;

[email protected]; or http://www.patton.com.

5.0 OPERATION

Once the Model 1090 is properly configured and installed, it should

operate transparently. This sections describes power-up, reading the

LED status monitors, and using the built-in loopback test modes.

5.1 POWER-UP

Before applying power to the Model 1090, first be sure that you

have read Section 4.3, and that the your power source matches the

power rating shown on the bottom label of the Model 1090. Failure to

do so could result in damage to the unit and connected

equipment, and may constitute a fire hazard. If your Model

1090 is AC powered, plug the AC power cord into both the Model 1090

and the AC outlet. Then power-up the unit using the rear power switch.

If your Model 1090 is DC powered, and has been connected to the DC

power source according to the instructions in Section 4.3, turn on the

DC power supply and then power-up the unit using the rear power

switch.

5.2 LED STATUS MONITORS

The Model 1090 features seven front panel LEDs that monitor

transmit data, receive data, request to send, carrier detect, data

terminal ready, test modes and error conditions. Figure 5 (above)

shows the front panel location of each LED. Following Figure 6 is a

description of each LED’s function.

TD and RD - Will glow red to indicate an idle condition of Binary

1 data on the respective terminal interface

signals. Green indicates Binary“0 data.

RTS - Will glow green to indicate that the Request to

Send signal from the terminal is active.

CD- Will glow red if no carrier signal is being received

from the remote modem. Green indicates that the

remote modem’s carrier is being received.

DTR - Will glow green to indicate that the Data Terminal

Ready signal from the terminal is active.

ER - Will glow red to indicate the likelihood of a Bit Error

in the received signal. During the 511 or 511/E

test, ER will flash to indicate that the Test Pattern

Detector has detected a bit error.

TM - Will glow green to indicate that the Model 1090 has

been placed in Test Mode. The unit can be

placed in test mode by the local user or by the

remote user.

5.3 DIAGNOSTICS

The Model 1090 is equipped with three sets of diagnostics to

evaluate the condition of the local and remote units, as well as the

twisted pair link between them: local analog loopback (LAL), remote

digital loopback (RDL), and local digital loopback (LDL) according to the

CCITT V.54 Standard, and bit error rate BER test according to the

CCITT V.52 Standard.

5.3.1 LOCAL ANALOG LOOPBACK (LAL)

The Local Analog Loopback (LAL) test checks the operation of the

local Model 1090. Any data sent to the local Model 1090 in this test will

be echoed (returned) back to the user device (see Figure 6, below)..

To perform an Analog Loopback test, follow these steps:

A. Activate Local Analog Loopback. This may be done in one of

two ways: First, by moving the front panel toggle switch UP to

Local. Second, by raising signal LL on the terminal interface

(for pin numbers, see Appendix D). Once LAL is activated,

the Model 1090 transmit output is connected to its own

receiver. The TM LED should be lit.

(continued)

Model 1090

KiloModem PS

High Speed Sync. Short Range Modem

RDTD RTS CD DTR ER TM Test Modes

Local -

Normal -

Remote -

- 511E

- Normal

- 511

Figure 5. Model 1090 Front Panel

1090

Figure 6. Local Analog Loop

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 using a

separate BER tester. 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 interface cable between the terminal and the

Model 1090.

5.3.2 REMOTE DIGITAL LOOPBACK (RDL)

The Remote Digital Loopback (RDL) test checks the performance of

both the local and remote Model 1090',

and

the communication link

between them. Any characters sent to the remote Model 1090 in this

test mode will be returned back to the originating device.

To perform an RDL test, follow these steps:

A. Activate RDL. This may be done in one of two ways: First, by

moving the front panel toggle switch DOWN to “Remote”. Or,

second, by raising the RL signal on the terminal interface (for

pin numbers, see Appendix D).

B. Perform a BER (bit error rate) test on the system, using BER

testers on both ends.

C. If the BER test equipment indicates a fault and the Local

Analog Loopback test was successful for both Model 1090s,

you may have a problem with the line between the Model

1090s. You should inspect the line for proper connections.

5.3.3 LOCAL DIGITAL LOOPBACK (LDL)

The Local Digital Loopback (LDL) test checks the local and remote

1090s and all communication paths. In LDL, the TX/RX circuit of the

local 1090 closes, thereby allowing characters sent from BOTH the

local terminal and remote terminal to loop back (echo) to themselves

(See Figure 8, below). To accurately perform LDL diagnostics,

technicians must send characters (or BER diagnostics) from each end.

To perform a LDL, follow the instructions below:

A. On the bottom of the unit, turn S1-4 to the ON position.

B. Enable LDL by moving the front panel toggle switch up to

“Local”, Or, by raising the signal LL on the terminal

interface(for pin numbers, see Appendix D).

C. Perform a BER (bit error rate) test on the system, using BER

testers on both ends.

D. If the BER test equipment indicates a fault and the Local

Analog Loopback test was successful for both Model 1090s,

you may have a problem with the line between the Model

1090s. You should inspect the line for proper connections.

NOTE: LDL will only work when S1-4 is ON.

Figure 7. Remote Digital Loop

Figure 8. Local Digital Loop

5.3.4 V.52 BER TEST GENERATOR

The Model 1090 has a built-in test pattern generator and detector. It

can be invoked at both ends of a link simultaneously or it can be used

with the Local Analog, Remote Digital or Local Digital Loopbacks. The

following example requires two operators: one to initiate and monitor

the test at the local Model 1090, and one at the remote Model 1090. To

use the V.52 BER test by itself, both operators should simultaneously

follow these steps.

A. Locate the 511/511E toggle switch on the front panel of the

Model 1090 and move it DOWN. This activates the V.52 BER

test mode and transmits a 511 pseudorandom test pattern to

the other unit. If any errors are received, the receiving Model

1090’s red ER LED will blink sporadically.

NOTE: For this test to function, the 511 switch on both Model

1090’s must be on.

B. If the test indicates no errors are present, move the V.52

toggle switch UP, activating the 511/E test. The 511/E test

transmits the 511 pseudorandom test pattern and injects

intentional errors about once per second. If the test is working

properly, the receiving Model 1090’s red ER LED will blink

regularly

A successful 511/E test will confirm that the link is in place,

and that the Model 1090 built-in 511 generator and detector

are working properly.

C. This test can be done by one operator by first activating the

local analog loop or remote digital loop.

APPENDIX A

1090 SPECIFICATIONS

Transmission Synchronous

Format

Transmission Line: Unconditioned twisted pair 19 - 26 AWG

Clocking: Internal, external or receive loopback

Distance: Up to 11 miles (19 AWG @ 56 kbps)

Data Rates: 48, 56, 64, 72, 80, 112, 128, 144 and 160

kbps (switch selectable)

Carrier Control: Constantly on or Controlled by RTS

RTS/CTS Delay: No delay, short delay (4 - 9 mSec), long

delay (33 - 71 mSec).

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 serial interface

LED Status TD, RD, RTS, CD, DTR, ER and TM

Indicators: (test mode)

Isolation: Minimum 3000V RMS via transformers

Surge Protection: 600W power dissipation at 1 ms

DCE/DTE Interface: Field-replaceable Quick ConnectTM

modules.

Twisted Pair 8-position modular jack (RJ-45)

Interface:

Power: 115/230 VAC (switch selectable), 50/60 Hz;

85 - 256 VAC, 50/60 Hz (universal input

option); 48 VDC (option). 5 watts.

Temperature

Range: 0-50°C (32-122°F)

Altitude: 0-15,000 feet

Humidity: 5 to 95% non-condensing

Dimensions: 7.3” x 6.6” x 1.62” (185mm x 168mm x

41mm)

Weight: 2.02 lbs. 1.0 Kg

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