FarSync BERT - FarSite Communications

FarSync BERT - FarSite Communications
FarSync BERT Tester - USB
BER line quality testers for your Windows Laptop
Key Features
Complete set of BERT (Bit Error Rate Test) line
test patterns
Tests synchronous and asynchronous lines in
loopback and point-to-point configurations
BER testing from your laptop with a durable
USB adapter
Connects to RS232, V.35, RS530, RS422, X.21,
RS485 and RS449 network interfaces
Tests NRZ, FM0, FM1, Manchester Encoding,
NRZI & Conditioned Di-phase line signalling
User controlled error injection facility
LabVIEW 32 / 64 bit and Windows APIs for test
Speed range from 15 baud up to 2 Mbits/s or up
to 16 Mbits/s (High Speed model)
The FarSync BERT provides a comprehensive, simple to use, all in one, line testing utility for testing asynchronous
and synchronous lines from your Laptop PC. There are no extra expensive modules to buy to test different line types.
All the popular standard BERT test patterns can be selected; the test period can be controlled; real time error counters
and full line test statistics are provided as well as support for user controlled error injection. The BER test patterns and
test support are implemented in hardware and thus operate independent of host activity/loading.
Lines with network interfaces RS232 (V.24), V.35, RS530 (EIA530), RS422, X.21 (V.11), RS449 and RS485 (4 wire)
can be tested with line speeds ranging from 15 baud up to 2 Mbits/s or to over 16 Mbits/s using the High Speed (HS)
The FarSync Flex adapter is simply plugged into any of your Laptop’s USB ports; select one of the cables provided to
connect to the line to be tested; the BERT application can then be started and the line quality results are displayed in
real time.
There is API access for LabVIEW or Windows applications,
this allows programmatic control of when tests are run,
the tests to be run, and the results obtained.
Line Monitor software, which includes support for use
with Wireshark, is also included in the product. Line
Monitor cables are ordered separately.
Test Modes
The FarSync BERT Tester can act as either the physical DTE or
The tests can be run in point-to-point modes or loopback
USB Adapter for BERT line testing and Line Monitoring
The tests can be invoked manually via either the graphical
user interface, batch command files or via the API
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Datasheet version 1.6
User Interface
The FarSync BERT Tester has a full graphical user interface (screen shot at the top of the page) that enables the
user to select and configure the test to be run. The final test results are displayed via the user interface. The status
of each test is reported in real-time via the GUI whilst each test is being run. A drop down window provides
additional detailed test results.
Test Patterns
A wide variety of pseudo random and fixed test patterns may be configured on the FarSync BERT Tester used to
test the line. ITU compliant test pattern recommendations are supported, these are compatible with other industry
standard BER Testers.
Synchronous Lines
The following pseudo random patterns are ITU-T compliant, they are used to test synchronous lines:
63: 26-1- including a max of 5 sequential zeros and 6 sequential ones
511: 29-1- including a max of 8 sequential zeros and 9 sequential ones
2047: 211-1- including a max of 10 sequential zeros and 11 sequential ones
215 -1 including a max of 14 sequential zeros and 15 sequential ones
220 -1 including a max of 19 sequential zeros and 20 sequential ones
223 -1 including a max of 22 sequential zeros and 23 sequential ones
QRSS: 220 -1 modified to transmit a maximum of 14 sequential zeros
The following fixed patterns can be used to test synchronous lines:
1:7 (1/8, 1-in-8) - 1 mark followed by 7 spaces
1/16 (1:15, 1-in-16) - 1 mark followed by 15 spaces
2/8 (2:6, 2-in-8) - 2 marks in 8 bits (0100 0010...)
3/24, 3-in-24 - 3 marks in 24 bits (0010 0010 0010 0000 0000 0000...)
MK - all 1s
SP - all 0s
1:1 - alternating 1s and 0s
FOX (see ITU recommendation R.52 for definition)
Asynchronous Lines
On asynchronous lines 5, 6, 7 and 8 bit operation can be tested. The following patterns are recommended to
be used:
63: 26 -1
511: 29-1
2047: 211-1
Line Error Reporting
The line test results displays industry-standard count values (e.g. ITU-T G.821) which help indicate the quality of the
line under test. The result table shows error rates, expressed as a percentage or in scientific/engineering format.
Bits - number of bits received
Blocks - number of blocks received
Block Errors - number of blocks received with errors
Framing Errors - number of incorrectly framed asynchronous characters received
Parity Errors - number of asynchronous characters received with incorrect parity
Errored Secs (ES) / Unavailable Secs (US) - seconds during which one or more errors has been detected
Severely Errored Secs (SES) - number of seconds during which the bit error rate is >= 0.1%
Available Secs (AS) / Error Free Secs (EFS) - seconds during which no errors have been detected
Loss of Sync (LOS) - number of times synchronisation has been lost
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The LabVIEW API allows the BERT functions to be invoked,
and results to be read, by LabVIEW programs (VIs). A
sample VI program is provided to illustrate the use of the
API. All the features available from the GUI are supported
by the LabVIEW API. Both 64bit and 32 bit versions of
LabVIEW are supported.
The adjacent diagram shows an synchronous V.24 (RS232)
LabVIEW 2010-2013 versions are supported.
Windows API
The BERT’s COM API allows its functions to be invoked, and results supplied back, programmatically from
Windows applications. All the features available from the GUI are supported by the COM API.
The FarSync BERT can also be used in command line/script mode with the configuration being specified by
command line parameters - the results are written to a log file.
Other Features
Single or multiple bit errors can be injected at the user’s request.
Line data can be inverted to support lines where the balanced pair data lines may have been swapped over or the
data supplied has been inverted. Inverted receive data can be automatically detected and converted as required.
Using the supplied loopback connector, the FarSync BERT Tester may be self tested prior to use.
Audible Alerts on errors and loss of sync.
Line clock speed estimator.
Supported Network Interfaces
The FarSync BERT Tester products is supplied with the following cables as these are the most common network
connector types used on synchronous and asynchronous lines.
V.35 DTE (M34M connector)- use cable UCV1
X.21 (V.11) DTE (DB15M connector) - use cable UCX1
RS232 (V.24) DTE (DB25M connector) - use cable KCR1-V2
RS530 (RS422) DTE (DB25M connector) - use cable KCR1-V2
RS485 (4 wire) - use cable KCR1-V2
Additional cables supporting the following other interfaces may also be purchased if required.
X.21 (V.11) DCE (DB15F connector) - cable name UCX1-DCE
RS232 (V.24) DCE (DB25F connector) - cable name KCR1-DCE
RS530 (RS422) DCE (DB25F connector) - cable name KCR1-DCE
RS449 (V.36) DTE (DB37M connector) - cable name KC449
See the Order Information section on the last page of this datasheet.
Supported Line Test Speed Range
FarSync BERT Tester-USB: Synchronous 100 baud to 2 Mbits/s, Asynchronous 15 baud to 115.2 Kbps/s
FarSync BERT HS Tester-USB: Synchronous: 100 baud to 16 Mbits/s, Asynchronous: 15 baud to 115.2 Kbps/s
Supported Types of Line Data Encoding
Manchester Encoding
Differential Manchester (Conditioned Di-phase)
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Windows Line Monitor
The product is supplied with a high
performance multi-channel line monitor
that allows the user to record and display,
store line traffic with protocol decoding.
The software also allows the popular
Wireshark Line Monitor software to be
To monitor both data directions on the line,
special line monitor cables are required.
These cables are not included in the
FarSync BERT Tester product but can be
ordered separately. See details of the line
monitor cables available as listed in the
Order Information section below.
Order Information
FarSync BERT USB BERT line quality tester for Synchronous (to 2 Mbits/s) & Asynchronous lines with X.21,
Tester - USB
RS232, V.35, RS422, RS485(4 wire) or RS530 network interfaces *
FarSync BERT High Speed USB BERT line quality tester for Synchronous (to 16Mbits/s) & Asynchronous
HS Tester -USB lines with X.21, RS232, V.35, RS422, RS485(4 wire) or RS530 network interfaces *
* Includes: FarSync Flex V2 - USB adapter with BERT Module
Line Monitor and BERT application software for Windows 8, 7, Vista and XP.
KCR1–V2 - RS232, RS530, RS485 DTE connection (DB25M) cable
UCX1 - X.21 connection DTE (DB5M) cable
UCV1 - V.35 connection DTE (V.35M) cable
Loopback connector for self test.
Requires a Laptop or Notebook, not supplied.
Line Monitor software requires a special cable to monitor data in both directions, to order see below.
Connection to a USB 2.0 or 3.0 port is required for BERT operation.
Additional cables available
Single RS449 DTE cable, DB37M connector,1.5 metres
Single combined RS232 (V.24) and RS530 (RS422) DCE cable, DB25F connector, 2 metres
Single X.21 (V.11) DCE cable, DB15F connector, 2 metres
Line Monitor cable for RS232 (V.24) and RS530 (RS422) with DB25M to DB25F pass-through
Line Monitor cable for X.21 (V.11) with DB15M to DB15F pass-through
FarSync ® is a UK registered trademark of FarSite Communications Ltd. All registered trademarks are acknowledged.
Microsoft, Windows are trademarks or registered trademarks of Microsoft Corporation in the United States and/or other countries.
Changes are periodically made to the information herein; these changes will be incorporated into new editions of the publication.
FarSite Communications may make improvements and/or changes in the products and/or programs described in this publication at any time.
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+44 (0)1256 336740
+44 (0)1256 854931
© Copyright FarSite Communications Ltd, 2009-14. All rights reserved.
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