B&B Electronics 1140 User Manual

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Miniature Fiber Optic Modem

With V.54 Diagnostics

Model 1140

Documentation Number 11401198

B&B Electronics Mfg. Co. Inc.

707 Dayton Road --P.O. Box 1040--Ottawa, IL 61350 PH (815)433-5100--FAX (815)433-5105

Internet: http://www.bb-elec.com orders@bb-elec.com support@bb.elec.com

B&B Electronics --March 1998

Documentation Number 11401198 Manual Cover Page

B&B Electronics --PO Box 1040--Ottawa, IL 61350

PH (815) 433-5100--FAX (815)433-5105

Table of Contents

 

1.0 WARRANTY INFORMATION ................................

1

1.1 RADIO AND TV INTERFERENCE.........................................

1

1.2 SERVICE................................................................................

2

2.0 GENERAL INFORMATION ..................................

3

2.1 FEATURES ...........................................................................

3

2.2 DESCRIPTION......................................................................

3

3.0 CONFIGURATION OVERVIEW.............................

4

3.1 CONFIGURATION SWITCHES.............................................

4

3.2 CONFIGURATION SWITCH SET "S1" .................................

5

S1-1throughS1-4:Data Rate Setting......................................

6

S1-5andS1-6:Clock Source...................................................

6

S1-7:Asynchronous/Synchronous Mode .................................

6

S1-8:Carrier Control Method ...................................................

7

3.3 CONFIGURATION SWITCH SET "S2" .................................

7

S2-1andS2-2:Word Length....................................................

7

S2-3:Extended Signaling Rate ................................................

8

S2-4andS2-5:RTS/CTS Delay...............................................

8

S2-8:V.54 Loopback Test Enable............................................

8

4.0 INSTALLATION.....................................................

9

4.1 FIBER CONNECTIONS.........................................................

9

4.2 RS-232CONNECTION..........................................................

9

5.0 OPERATION........................................................

10

5.2 TEST MODES......................................................................

10

5.2.1 LOCAL ANALOG LOOP BACK (LAL) ...........................

10

5.2.2 REMOTE DIGITAL LOOPBACK (RDL).........................

11

5.2.3 USING THE V.52 BER TEST INDEPENDENTLY.........

12

5.3 POWER UP .........................................................................

12

APPENDIX A: SPECIFICATIONS ............................

13

APPENDIX B. PIN CONFIGURATIONS...................

14

Documentation Number 11401198 Manual

Table of Contents

B&B Electronics --PO Box 1040--Ottawa, IL 61350

PH (815) 433-5100--FAX (815)433-5105

1.0 WARRANTY INFORMATION

B&B Electronics warrants all Model 1140 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 B&B 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. B&B 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 1140 generates and uses radio frequency energy, and if not installed and used properly—thatis, in strict accordance with the manufacturer'sinstructions—maycause interference to radio and television reception. The Model 1140 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 1140 does cause interference to radio or television reception, which can be determined by disconnecting theRS-232interface, 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-orientingthe receiving antenna and/or plugging the receiving equipment into a different AC outlet (such that the computing equipment and receiver are on different branches).

Documentation Number 11401198 Manual

1

B&B Electronics --PO Box 1040--Ottawa, IL 61350

PH (815 433-5100--FAX (815)433-5105

1.2 SERVICE

All warranty and non-warrantyrepairs must be returned freight prepaid and insured to B&B Electronics. All returns must have a Return Materials Authorization number on the outside of the shipping container. This number may be obtained from B&B Electronics Customer Service at (815)433-5100.Packages received without an RMA number will not be accepted.

B&B Electronics' technical staff is also available to answer any questions that might arise concerning the installation or use of your Model 1140. Technical Service hours: 8AM to 5PM CST, Monday through Friday.

2 Documentation Number 11401198 Manual

B&B Electronics --PO Box 1040--Ottawa, IL 61350

PH (815) 433-5100--FAX (815)433-5105

2.0 GENERAL INFORMATION

Thank you for your purchase from B&B Electronics. 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 B&B Electronics Technical Support at (815) 433-5100.

2.1 FEATURES

Supports async. or sync. communication over dual optical fibers

V.52 and V.54 diagnostics

Data rates to 38.4 Kbps

Range to 2 miles

Immune to RFI/EMI noise, ground loops and transient surges

Easily accessible Diagnostic & Configuration Switches

Jumper-selectablecarrier control

Requires no AC power or batteries

Two easy-to-readstatus indicators

Male or female DB-25and SMA or ST connectors available

2.2 DESCRIPTION

The B&B Model 1140 miniature dual fiber optic modem brings fiber to the desktop. Combining the inviolability of fiber with the troubleshooting capabilities of V.52 and V.54 diagnostics, the Model 1140 is the best choice for your most critical RS-232links. The Model 1140 operates async. or sync., supports data rates to 38.4 Kbps and plugs directly into a workstation'sRS-232port. Like all fiber optic modems, the Model 1140 is inherently immune to RFI/EMI noise, ground loops and transient surges. The carrier may be switch selected as either "Continuously On" or "Controlled by RTS". TheRS-232connector is configured as DCE.

Two easy-to-readLED indicators monitor the Error and Test modes. Drawing all necessary power from theRS-232interface, the Model 1140 requires no AC power or batteries to operate. Measuring only 3.42" x 2.10" x .73", the Model 1140 is able to fit into tight installation spaces. On theRS-232side, the Model 1140 comes equipped with either a male or femaleDB-25connector; on the fiber side it is available with a choice of SMA or ST connectors.

Documentation Number 11401198 Manual

3

B&B Electronics --PO Box 1040--Ottawa, IL 61350

PH (815 433-5100--FAX (815)433-5105

3.0 CONFIGURATION OVERVIEW

The Model 1140 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 1140 properly. If you have any questions, don't hesitate to call B&B’s Technical Support Department at (815) 433-5100(8-5PM, CST).

3.1 CONFIGURATION SWITCHES

The Model 1140 uses a unique set of 16 external mini DIP switches that allow configuration to an extremely wide range of applications. These 16 DIP switches are grouped in two eight-switchsets, and are externally accessible from the underside of the Model 1140 (see Figure 1). Since all configuration DIP switches are externally accessible, there is no need to open the Model 1140's case for configuration.

The configuration switches allow you to select data rates, clocking methods, V.52 & V54 tests, word lengths, extended signaling rates, async. or sync. mode. The drawings, text and tables on the following pages describe all switch locations, positions and functions.

Figure 1. Model 1140 Configuration Switches External Position

4 Documentation Number 11401198 Manual

B&B Electronics --PO Box 1040--Ottawa, IL 61350

PH (815) 433-5100--FAX (815)433-5105

The Model 1140 has two sets of eight switches, yielding 16 total DIP switches. The three sets will be referred to as S1 and S2. As Figure 2 shows, the orientation of all DIP switches is the same with respect to "ON" and "OFF" positions.

Figure 2. Close-upof DIP switches showing “ON” and “OFF” positions

3.2 CONFIGURATION SWITCH SET "S1"

The DIP switches on S1 set data rate, clock source, async./sync. mode and carrier control method. The default settings are summarized in the table below.

Figure 3. Summary of DIP switch default settings for set S1

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PH (815) 433-5100--FAX (815)433-5105

S1-1throughS1-4:Data Rate Setting

Switches S1-1throughS1-4are set in combination to determine the asynchronous and synchronous data rate for the Model 1140.

S1-1

S 1-2

S1-3

S1-4

Setting

On

On

On

On

1.2 Kbps

Off

On

On

On

1.8 Kbps

On

Off

On

On

2.4 Kbps

Off

Off

On

On

3.6 Kbps

On

On

Off

On

4.8 Kbps

Off

On

Off

On

7.2 Kbps

On

Off

Off

On

9.6 Kbps

Off

Off

Off

On

14.4 Kbps

On

On

On

Off

19.2 Kbps

Off

On

On

Off

28.8 Kbps

On

On

Off

Off

38.4 Kbps

Off

On

Off

Off

57.6 Kbps

S1-5andS1-6:Clock Source

Switches S1-5andS1-6are set in combination to determine the transmit clock source for the Model 1140.

SI-5

S1-6

Setting

On

On

Internal transmit clock

Off

On

Receive recover clock

On

Off

External transmit clock

S1-7:Asynchronous/Synchronous Mode

The setting for switch S1-7determines whether the Model 1140 is in asynchronous or synchronous operating mode.

S1-7 Setting

On

Asynchronous

Off

Synchronous

6

Documentation Number 11401198 Manual

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S1-8:Carrier Control Method

The setting for switch S1-8determines whether the carrier is "constantly on" or "controlled by RTS". This setting allows for operation in switched carrier, rnultipoint and/or hardware handshaking applications.

S1-8

Setting

Off

Constantly On

On

Switched Carrier

3.3 CONFIGURATION SWITCH SET "S2"

The DIP switches on S2 set word length, extended signaling rate, RTS/CTS delay and V.52 and V.54 diagnostic test.

Figure 4. Summary of DIP switch default settings for S2

S2-1andS2-2:Word Length

Switches S2-1andS2-2are 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

 

 

 

Documentation Number 11401198 Manual

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B&B Electronics --PO Box 1040--Ottawa, IL 61350

PH (815) 433-5100--FAX (815)433-5105

S2-3:Extended Signaling Rate

The setting for switch S2-3determines the range of variability the Model 1140 "looks for" in asynchronous data rates (i.e., the actual variance from a given frequency level the Model 1140 will tolerate).

S2-3

Setting

Off

-2.5%to +1% Basic

On

-2.5%to +2.3% Extended

S2-4andS2-5:RTS/CTS Delay

The combined settings for switches S2-4andS2-5determine the amount of delay between the time the Model 1140 "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

S2-8:V.54 Loopback Test Enable

To reset the V.54 circuit, set switch S2-6to the "ON" position, then back to the "OFF" position.

S2-8

Setting

Off

V.54

Enable

On

V.54

Disable

8

Documentation Number 11401198 Manual

B&B Electronics --PO Box 1040--Ottawa, IL 61350 PH (815)433-5100--FAX (815)433-5105