Q & A with Vaunix: Using Lab Brick Phase Shifters Over Wide and Varying Temperature Ranges

Posted by Scott Blanchard on Dec 1, 2015 10:00:00 AM

In our Q & A blog series, we’ve addressed some of the most important and technical questions about our Lab Bricks. We hope these answers give you a better understanding of how our products work.

Q. We would like to connect 48 Lab Brick LPS-402 phase shifters to a computer via an Ethernet-to-USB hub while operating over a wide range of temperatures. What are the operating temperatures and environmental constraints for the LPS-402, what is their operating lifetime, and how fast can they be switched?

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Topics: Phase Shifters, Lab Brick, Q & A

Q & A with Vaunix: Phase and Accuracy of Lab Brick Phase Shifters

Posted by Scott Blanchard on Nov 17, 2015 10:00:00 AM

In our Q & A blog series, we’ve addressed some of the most important and technical questions about our Lab Bricks. We hope these answers give you a better understanding of how our products work.

Q. What is the phase accuracy and repeatability of Lab Brick phase shifters?

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Topics: Phase Shifters, Lab Brick, Q & A

Q & A with Vaunix: Controlling Lab Brick Phase Shifters Using Linux

Posted by Scott Blanchard on Nov 3, 2015 10:00:00 AM

In our Q & A blog series, we’ve addressed some of the most important and technical questions about our Lab Bricks. We hope these answers give you a better understanding of how our products work.

Q. Can Lab Brick phase shifters be controlled using Linux?

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Topics: Phase Shifters, Lab Brick, Q & A

Q & A with Vaunix: Antenna Testing using Lab Brick Phase Shifters

Posted by Scott Blanchard on Oct 20, 2015 10:00:00 AM

In our Q & A blog series, we’ve addressed some of the most important and technical questions about our Lab Bricks. We hope these answers give you a better understanding of how our products work.

Q. We would like to use Lab Brick phase shifters to measure the radiation pattern of a four-element antenna array in a beam forming configuration. The set-up would include one signal generator, one 1-to-4 splitter, four phase shifters, and a four-port antenna. Vaunix specifies phase shift accuracy as +-2.5 deg., so in our scenario using four phase shifters does each one apply a phase shift with an error of +-2.5 deg. or will all have the same error (that is, all having +1.3 deg.)? Also, is phase stable over time or does it oscillate around the programmed value by +-2.5 deg., and will all four oscillate equally? Finally, does the phase shifter introduce a delay? If so, is it the same for all devices? 

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Topics: Phase Shifters, Lab Brick, Q & A

Q & A with Vaunix: Using Lab Brick Signal Generators with External Clock References

Posted by Scott Blanchard on Sep 22, 2015 10:00:00 AM

In our Q & A blog series, we’ve addressed some of the most important and technical questions about our Lab Bricks. We hope these answers give you a better understanding of how our products work.

Q. Can I lock three Lab Brick LMS-203 signal generators to an external reference or daisy chain them to one internal reference. Can I also modify the RF output power?

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Topics: Signal Generators, Lab Brick, Q & A

Q & A with Vaunix: Controlling Lab Brick Products Using Python

Posted by Scott Blanchard on Sep 1, 2015 10:00:00 AM

In our Q & A blog series, we’ve addressed some of the most important and technical questions about our Lab Bricks. We hope these answers give you a better understanding of how our products work.

Note: Many customers control their Lab Brick products using Python. If you’re one of them, please make sure to use the attenuator SDK with ANSI-C style function names from the Vaunix FTP site. It should be straightforward to call the functions from Python using the “types” extension. The following question is one that you may also have:

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Topics: Lab Brick, Q & A

Q & A with Vaunix: If you don’t see it here…

Posted by Scott Blanchard on Aug 18, 2015 10:00:00 AM

In our Q & A blog series, we’ve addressed some of the most important and technical questions about our Lab Bricks. We hope these answers give you a better understanding of how our products work.

We sometimes get requests for a special capability or feature that our Lab Brick signal generators do not have as standard features, which is understandable, as their optional capabilities don’t just jump out at you on our website. However, pulse modulation and external sweep triggering capabilities are optionally available for our LMS Series signal generators and an external reference input and an RF output of +13 dBm can be specified for the LSG Series signal generators.

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Topics: Lab Brick, digital attenuators, Q & A

Q & A with Vaunix: New Attenuator GUI Expands Dwell Time

Posted by Scott Blanchard on Aug 4, 2015 10:00:00 AM

In our Q & A blog series, we’ve addressed some of the most important and technical questions about our Lab Bricks. We hope these answers give you a better understanding of how our products work.

Customers and potential customers have asked us about increasing attenuator dwell time. We listened. The latest version of the attenuator user interface allows dwell time to be set at up to 500 s. If anyone needs even longer dwell times, we would be happy to entertain your request.

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Topics: digital attenuators, Q & A

Q & A with Vaunix: Controlling Multiple Attenuators

Posted by Scott Blanchard on Jul 21, 2015 10:00:00 AM

In our Q & A blog series, we’ve addressed some of the most important and technical questions about our Lab Bricks. We hope these answers give you a better understanding of how our products work.

Q. If I plug four LDA-602N attenuators into four USB ports on a PC, can I address them with the attenuator software individually and change their attenuation separately as well as simultaneously?

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Topics: digital attenuators, Q & A

Q & A with Vaunix: Lab Brick Attenuators, Windows, and USB

Posted by Scott Blanchard on Jul 7, 2015 10:00:00 AM

In our Q & A blog series, we’ve addressed some of the most important and technical questions about our Lab Bricks. We hope these answers give you a better understanding of how our products work.

Q. Can the LDA-302P-2 run from Windows and if so is it possible to guarantee its switching speed or does the Windows GUI just set up the profile and the microcontroller operate on the data? Is it also possible to vary the duty cycle between iterations? For example, at 1 ms we would like 0-dB attenuation and 4 ms at maximum attenuation, repeatedly continuously.

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Topics: Lab Brick, digital attenuators, Q & A