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.
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 3 Mbits/s or to over 16 Mbits/s with the FarSync BERT HS Tester-USB model.
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.
API access for LabVIEW or Windows applications enables the tests to be run, and the results obtained, programmatically.
Line Monitor software, which includes support for use with Wireshark, is also included in the product. Line Monitor cables are ordered separately.
Video – operation, installation, features
Download this video on using the FarSync BERT Tester (MP4, 8.6MB)
- The FarSync BERT Tester can act as either the physical DTE or DCE
- The tests can be run in loopback or point-to-point modes including interoperation with other BER Testers
- The tests can be invoked manually via the graphical user interface, via batch command files or via the API
The FarSync BER 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.
A wide variety of pseudo random and fixed test patterns may be configured on the FarSync BERT Tester used to test the line. ITU test pattern recommendations are supported.
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 consecutive 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)
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.
- 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) – number of secs during which one or more errors has been detected
- Severely Errored Secs (SES) – number of secs during which the bit error rate is >= 0.1%
- Available Secs (AS) / Error Free Secs (EFS) – number of secs during which no errors have been detected
- Loss of Sync (LOS) – number of times synchronisation has been lost
The result table shows error rates, expressed as a percentage or in scientific / engineering format.
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 LabVIEW access is handled.
LabVIEW 2010-2013 versions are supported.
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.
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 display.
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 – using cable UCV1
- X.21 (V.11) DTE – using cable UCX1
- RS232 (V.24) DTE – using cable KCR1-V2
- RS530 (RS422) DTE – using cable KCR1-V2
- RS485 (4 wire) – using cable KCR1-V2
Additional cables supporting the following other interfaces may be purchased separately if required
- RS449 (V.36) DTE – using cable KC449
- X.21 (V.11) DCE – using cable UCX1-DCE
- RS232 (V.24) DCE – using cable KCR1-DCE
- RS530 (RS422) DCE – using cable KCR1-DCE
See the Order Information section at the bottom of the page.
Supported Line Test Speeds
FarSync BERT HS – Synchronous: from 100 baud to 16 Mbits/s, Asynchronous: 15 baud to 115.2 Kbps/s
FarSync BERT – Synchronous: from 100 baud to 2 Mbits/s, Asynchronous: 15 baud to 115.2 Kbps/s
Supported Line Data Encoding
- Manchester Encoding
- Conditioned Di-phase (Differential Manchester)
Windows Line Monitor
The product is supplied with a high performance multi-channel line monitor software that allows the user to record, display and store line traffic with protocol decoding.
The software also allows the popular Wireshark Line Monitor software to be used to monitor the line.
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.
Details of the line monitor cables available are listed on the Order Information section at the end of this page.
Click to view a video on configuring and using the FarSync Line Monitor and Wireshark
|FarSync BERT Tester-USB||USB BERT (Bit Error Rate Test) line quality tester for Synchronous and Asynchronous lines with X.21, RS232, V.35, RS422, RS485 (4 wire) or RS530 network interfaces. Includes:
|FarSync BERT HS Tester-USB||High Speed USB BERT (Bit Error Rate Test) line quality tester for Synchronous and Asynchronous lines with X.21, RS232, V.35, RS422, RS485 (4 wire) or RS530 network interfaces. Includes:
Requires Laptop or PC, not supplied.
The Line Monitor software requires a special Line Monitor cable to monitor data in both directions, to order the cables see below.
Connection to a USB 2.0 or 3.0 port is required for BERT operation.
|KC449||Single RS449 DTE cable, DB37M connector, 1.5 metres||FS6019|
|KCR1-DCE||Single combined RS232 (V.24) and RS530 (RS422) DCE cable, DB25F connector, 2 metres||FS6070|
|UCX1-DCE||Single X.21 (V.11) DCE cable, DB15F connector, 2 metres||FS6075|
|KCR-MON||Line Monitor cable for RS232 (V.24) and RS530 (RS422) with DB25M to DB25F pass-through||FS6016|
|KCX-MON||Line Monitor cable for X.21 (V.11) with DB15M to DB15F pass-through||FS6017|