The N2101B PXIT 10.3125 Gb/s Bit Error Ratio Tester
(BERT) consists of a high accuracy clock source,
data pattern generator, and error detector. It will
automatically perform bit error ratio analysis to
characterize the quality of devices at 12 standard
internal rates from 155 Mb/s to 8.5 Gb/s.
In conjunction with a synthesizer such as
the Agilent N2099A, the N2101B BERT can
operate at any rate up to 10.3125 Gb/s.
To realize the most complete value of the
N2101B it can be combined with the other
Agilent PXIT family of products such as
the N2100B PXIT Digital Communication
Analyzer and the N2102B Pattern Generator.
PXIT 10.3125 Gb/s
Bit Error Ratio Tester
Data Sheet
The user friendly configuration screen.
• Single instrument 3-slot wide PXI card containing pattern generation with
error detection
• Easily combined with DCA, Synthesizer, Pattern Generator or multiple
BERT modules in a PXI chassis
• Bit Error Rate in three modes - History (GUI only), Continuous, and Time Window
• Automatic clock data align
• Eye opening measured and/or extrapolated to a defined error rate
• Jitter Bathtub display and analysis
• Error injection: single error or error rate injection
• Significantly smaller than a conventional BERT
• Differential data generation and analysis
• User selectable data patterns:
▫ PRBS 2n -1, n=7, 9, 11,15, 23, 31
▫ K28.5, K28.7 and CR Pat
• User defined patterns
▫ 2048 bits maximum length
▫ 16 Kbytes if pattern length is integer multiple of 64
• Pattern generation and BER measurements using the internal clock source
for the following rates:
▫ 155 Mb/s
▫ 622 Mb/s
▫ 1.0625 Gb/s
(1xFibre Channel)
▫ 1.25 Gb/s
(Gigabit Ethernet)
▫ 2.125 Gb/s
(2xFibre Channel)
▫ 2.488 Gb/s
▫ 2.500 Gb/s
(Parallel Optics, PCI-Express)
▫ 3.125 Gb/s
▫ 4.25 Gb/s
(4xFibre Channel)
▫ 5.0 Gb/s
(Parallel Optics, PCI-Express II)
▫ 6.25 Gb/s
(Double XAUI)
▫ 8.5 Gb/s
(8xFibre Channel)
• Pattern generation and BER measurements using an external clock at any
rates from 622 Mb/s up to 10.3125 Gb/s. Therefore the N2101B can generate
patterns and perform BER measurements on these standard rates.
▫ 9.95 Gb/s
▫ 10.3125 Gb/s
(10 Gigabit Ethernet)
Bit Error Rate: History Mode.
Bit Error Rate: Continuous Mode
Pattern generator
Output jitter
Rise/Fall times (20-80%)
Output voltage range (single-ended)
Amplitude resolution
2.5 ps RMS (Max) 1.5 ps RMS characteristic
25 ps (Max) 22 ps characteristic
250 mV to 1 V
5 mV
Error detector
Input range (differential)
Input sensitivity (differential)
Input impedance (single ended)
Input impedance (differential)
Phase margin sweep range < 8 Gb/s
Phase margin sweep range > 8 Gb/s
50 mV to 2 V
50 mV
50 Ohm (characteristic)
100 Ohm (characteristic)
> 2 UI
200 ps
Divided clock rate outputs
Pattern trigger
Pattern trigger/clock output voltage
Clock voltage output (dc coupled)
External clock input voltage range
External clock input frequency range
1,2,4,8 & 128 (output on separate port)*
Triggers every 64th pattern for PRBS
1 V pp (characteristic)
400 mV to 1.1 V (characteristic)
500 mV to 1 V (characteristic)
500 MHz to 10.7 GHz
* For 155 Mb/s there is only one clock output option available (the divide by 1)
Note: Unless stated otherwise signals are AC coupled and 50 ohm terminations are expected.
Jitter Bathtub display with corresponding eye width,
total Jitter, and deterministic Jitter measurements.
The N2101B BERT and its accompanying software fully complies with PXI
specifications. To fulfill this a Windows® application and DLL are provided. The
Windows application enables the user to control the instrument without any
user development required. The DLL provides an API through which custom
applications can be easily developed to integrate the BERT. For further ease of
programming and compatibility, example code is supplied. In addition to the DLL
API, ActiveX Control extends programmability to any ActiveX container or COM
compliant programming environment. This includes Visual C++, Visual Basic,
C#, Excel, LabView and many other environments.
Online assistance:
Software features include:
Phone or Fax
A DLL providing the functions of the API.
An ActiveX Control wrapper for the DLL providing the same functions.
A Windows application control panel.
The following sample code is also provided:
• C++ sample code shows how to use the DLL directly.
• Visual Basic sample code shows how to use the ActiveX Control.
• C# sample code also shows how to use the ActiveX Control.
N2101B PXIT BERT Option 300 155 Mb/s to 10.3125 Gb/s module
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National Instruments Corporation.
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Revised: 11/8/06
Product specifications and descriptions
in this document subject to change
without notice.
© Agilent Technologies, Inc. 2007
Printed in USA, May 13, 2008