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9 Posts authored by: Instructorman Top Member
An Intelligent garage door controller I have a plan.  With the TI CC11XL dev kit that accompanied the Keysight N9322C spectrum analyzer Road Test, I  would like to develop an intelligent garage door controller.  The video below lays down the broad strokes of the design concept. The probability of successfully completing this design project before the blogging challenge deadline is not great as there will simply not be enough time available in my days to get everything done.  ...
Cosmin and Shabaz are posting excellent blogs that demonstrate the capabilities and cool features of the Keysight N9322C basic spectrum analyzer and the TI CC11XL dev kit. See Cosmin use the TI CC11XL and the N9322C to demonstrate Doppler shift in this blog post and get a good overview of the N9322C and the CC11XL in this blog post.  Shabaz provides a great tutorial on using the N9322C tracking generator to evaluate antennas in this blog post and a very straightforward demonstration of FM d ...
After playing with the Keysight N9322C for a few days I have garnered sufficient skill to make this full featured instrument reveal just a fraction of its capability.  A far more involved exploration will be posted in the Road Test review section, but for now, here is a quick illustration of just one very cool feature.   The TI CC11XL development kit comes with two TRXEB boards and several radio modules.  The pre-loaded firmware includes a mode that allows one board to send out a ...
While waiting for a calibrated microphone to arrive, I thought I'd try some simple audio spectrum tests using an Agilent 33622A and an Android spectrum analyzer app, called Speedy Spectrum, running on an Asus Nexus 7 tablet.  My intent was to play with a basic set up to get a sense of how the equipment I had at hand performed and to see if what I've read about psychoacoutsic mapping could be demonstrated in a simple and measurable way.  What came out of these exploratory tests was inte ...
After making an initial post about my research plans for psychoacoustic masking and audio steganography using the Agilent 33622A, I left for a month long trip to Europe and Iceland.  I'm back now with plenty of interesting travel experiences and a lot of bills to pay.  I am also back to full time work and we are starting undertaking major house renovations - including the addition of a purpose built electronics lab space! I will be busy, but I'm moving forward on the psychoacoustic r ...
An experimental plan to investigate message hiding in audio content May 6, 2014   In this introductory post I describe my plan for performing a series of experiments centered on the Agilent 33622A to explore audio steganography and psychoacoustic masking.  Over the spring and summer of 2014 I hope to carry out this experimental plan and report my findings here in the Test & Measurement blog space on Element 14.  I want to get the plan posted now as I will be travelling in Eu ...
Randomness doesn't always come easily As described in my  previous blog entries, I have set up a PIC18F4520 to drive the data in line on a string of WS2811 RGB LEDs.  There are 240 LEDs in the 4m long string.  Previously I wrote a function that generates a properly timed pulse train from an array of values in memory.  I have documented several of the light effects that can be created in previous blog entries.  The challenge in this blog is to write a function that will ...
I first posted this blog entry in my personal blog.  It was meant to be posted in Test and Measurement.  It is now posted in both places.   In this post I compare the trend analysis feature on three instrument:  The Agilent 34461A, the Tektronix DMM4050 and the Agilent 53230A universal frequency counter.  My findings suggest to me that all three instruments provide useful trend features, but the 34461A does so at a lower price point.   I used each instrument to tr ...
This blog entry describes my experience with the histogram function on the Agilent 34461A 6 1/2 digit multimeter. Note:  the symbol table function in the e14 blog editor is not working for me tonight, so I've compromised by using the word "ohm", etc where a symbol would normally have been inserted.   My exploration of the histogram function begins with a plan to build up a histogram of single measurements on batches of same value through-hole carbon composition  resistors all fr ...

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