Service Manuals, User Guides, Schematic Diagrams or docs for : Agilent English _ 2012-10-01 _ PDF 344 KB 5991-1128EN c20121025 [4]
<< Back | HomeMost service manuals and schematics are PDF files, so You will need Adobre Acrobat Reader to view : Acrobat Download Some of the files are DjVu format. Readers and resources available here : DjVu Resources
For the compressed files, most common are zip and rar. Please, extract files with Your favorite compression software ( WinZip, WinRAR ... ) before viewing. If a document has multiple parts, You should download all, before extracting.
Good luck. Repair on Your own risk. Make sure You know what You are doing.
Image preview - the first page of the document
![English _ 2012-10-01 _ PDF 344 KB 5991-1128EN c20121025 [4]](/pics/5c4d6d5c3a49a.gif)
>> Download English _ 2012-10-01 _ PDF 344 KB 5991-1128EN c20121025 [4] documenatation <<
Text preview - extract from the document
Agilent 33500 Series
Waveform Generators
PRBS Pattern Generation
Technical Overview
Testing digital devices typically requires sending a series
of alternating high and low voltage values (bits) to the
device under test (DUT). If these bits are easily predict-
able, the test coverage will be limited to a small set of
possible scenarios. For this reason, it is often helpful
to send a near-random stream of bits, such as the one
shown in Figure 1, to the DUT.
To generate this type of bit stream, the Agilent 33500
Series waveform generators include a pseudo-random
binary sequence (PRBS) waveform generator. A PRBS
waveform is generated by a linear feedback shift register
(LFSR) like the one shown in Figure 2.
Figure 1. A near-random stream of bits
The branches after register cells 5 and 9 are called taps,
and the configuration of the LFSR and its taps determines
the PRBS waveform.
Figure 2. A linear feedback shift register
How to generate a PRBS waveform from the
front panel
From the front panel, press [Waveforms] > More > PRBS
> [Parameters]. You can then specify the polynomial
function used to generate the sequence (7, 9, 11, 15, 20 or
23 register cells), the bit rate at which the sequence plays
(up to 50 Mbps), and an edge transition time that is used
for both rising and falling edges.
Figure 3. PRBS menu
FUNCtion:PRBS:DATA The number after the PN
How to generate a PRBS waveform using SCPI {PN7|PN9|PN11|PN15|PN20|PN23} specifies the LSFR length.
An LFSR of length L results
You also can generate PRBS waveforms using the Standard in a bit sequence of length
Commands for Programmable Instruments (SCPI) program- 2L-1.
ming language. The equivalent SCPI commands are:
FUNCtion:PRBS:BRATe The can range
from 1 Mbit/s to 50 Mbit/
sec
FUNCtion:PRBS:TRANsition[:BOTH] The edge transition time for
leading and falling edges,
from 8.4 ns to 1 s.
Summary
Use the PRBS waveform to improve the robustness of your
digital device tests. By sending a near-random bit stream to
your device, you can test your device under a wide variety
of conditions.
2
3
www.agilent.com
www.agilent.com/find/trueform
For more information on Agilent Technologies' products,
Agilent Advantage Services is committed to your success
applications or services, please contact your local Agilent office.
throughout your equipment's lifetime. To keep you competi- The complete list is available at:
tive, we continually invest in tools and processes that
www.agilent.com/find/contactus
speed up calibration and repair and reduce your cost of
ownership. You can also use Infoline Web Services to man-
Americas
age equipment and services more effectively. By sharing
Canada (877) 894 4414
our measurement and service expertise, we help you create
Brazil (11) 4197 3600
the products that change our world. Mexico 01800 5064 800
United States (800) 829 4444
www.agilent.com/find/advantageservices
Agilent Electronic Measurement Group
Asia Pacific
DEKRA Certified Australia 1 800 629 485
ISO 9001:2008 Quality Management Sys
System
China 800 810 0189
Hong Kong 800 938 693
www.agilent.com/quality
India 1 800 112 929
Japan 0120 (421) 345
Korea 080 769 0800
Agilent Email Updates Malaysia 1 800 888 848
www.agilent.com/find/emailupdates Singapore 1 800 375 8100
Get the latest information on the products and Taiwan 0800 047 866
applications you select. Other AP Countries (65) 375 8100
Europe & Middle East
Belgium 32 (0) 2 404 93 40
www.axiestandard.org Denmark 45 45 80 12 15
AdvancedTCA ◦ Jabse Service Manual Search 2024 ◦ Jabse Pravopis ◦ onTap.bg ◦ Other service manual resources online : Fixya ◦ eServiceinfo