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RoadTests & Reviews

309 posts
Initial Hardware Tests I've started to learn my way around this board - it has a tremendous amount of capability/functionality.  My plan is to use the VCU Design example (v2018.3) to learn the board (SOM + Carrier) and test the functionality that I will need to implement my roadtest project.   The design is well documented on GitLab:  v2018.3_vcu_uz7ev_cc-06212019 There is a pre-built SD card image which makes it easy to get up and running.   For initial hardware testing I ...
I was fortunate to have been selected to test a second Avnet UltraZed-EV Starter Kit that Randall and the sponsor added to the original roadtest.  Things got off to an inauspicious start as a train derailment somewhere between Chicago and Portland (OR) delayed the UPS shipment of my kit.   I finally received it last night (06/22/2020) at around 7pm.   I am particularly interested in testing the integrated H.264/H.265 video codec unit (VCU) component of this kit and eventually ...
Introduction Double Pulse Software Test Setup Test Results MOSFET Comparison PWM Signal Tests Conclusions Introduction  My third and final test on the Tektronix AFG31052 Arbitrary Waveform Generator is to investigate the use of the Double Pulse software for testing the performance of MOSFET and IGBT devices. Naturally, I have to try and build in some aspect of an insulation tester into as many of the blogs I write on element14 and the main voltage generation cir ...
I did not see this road test application until it was too late,   Cool Tools 2020: USB Soldering Iron     But I have a cheap, us$8.00, USB-powered soldering iron that I bought at the Microcenter store in the US.  https://www.microcenter.com/product/484630/eclipse-enterprise-portable-usb-soldering-iron My box says it is Pro's Kit brand, model # SI-168U. Microcenter lists it as Eclipse brand for some reason.  It claims to reach 480 C (+/- 10% -- 10% of what?  48 ...
Introduction  This aspect of the review is at the core of the reason I applied of this RoadTest. I have an unquenchable thirst for knowledge around partial discharge in high voltage insulation systems, that I had previously experimented with using the MDO34 and attempted to rebuild partial discharge patterns with its built in waveform generator. I had struggled to obtain satisfactory results with this, so I hoped that the increased capabilities of the AFG31052 would overcome the previous c ...
Introduction Sine wave distortion Total harmonic distortion Spurious output measurement Triangular wave linearity Output symmetry Conclusions   Introduction  This is a continuation of the verification tests on the waveform generators and comparing the AFG31052 results to other instruments.     Sine wave distortion  This is another measurement in the verification steps from Tektronix and is further supplemented by a total harmonics distorti ...
Introduction Frequency verification Phase displacement DC offset AC amplitude AC Flatness Test AM Modulation Depth Square Wave Duty Cycle Square wave rise and fall times Who Knew?   Introduction  For the first part of my review, I aim to carry out verification tests on the AFG31052, carry out the same tests on a Rigol DG1022, Uni-T UTG962 and the AWG element of the MDO34 that I also have in my possession. For some of the tests, the Picoscope 340 ...
Completed work on road testing the Tektronix AFG31052 Signal ARB/Function Generator   First, I would like to express my thank you to Tektronix and Element14  for selecting me to roadtest the AFG31052 Arbitrary Function Signal Generator.  I feel fortunate and honored to be one of the three people selected for this roadtest and I would also like to thank Element14 for organizing this roadtest.  This is an on-going blog that over the following weeks will show my step-by-step pr ...
GPIO GPIO pins are 'general purpose input/output pins', configurable as both input and outputs where needed. These pins form the most common interface to hook up your own hardware. According to the hardware description, the maaxboard has no less than 5 x 32 = 160 GPIO pins. This is also visible to the linux system, when you look at the /sys/class/gpio directory: # ls -lia /sys/class/gpio/ totaal 0 1946 drwxr-xr-x  2 root root    0 apr 20 16:53 .   10 drwxr-xr-x 64 r ...
Interfaces After playing around with the image a little, it was time to connect the maaxboard to the outside world. The first things I wanted to try was to use the i2c interface, since that was my preferred bus to hook up my sensors. I2C is a bus which allows multiple devices to share the same bus, each with its own address. Looking around the hardware I found that its 4 i2c buses were spread out: Bus 1 is on the camera connector Bus 2 is on the GPIO pin header: SDA is pin 3, SCL is pin 5 B ...
After the initial setup and installation, I have put some more time into testing of the software, covering the following topics: Linux Desktop I finally found the setting in my archaic HDMI monitor to turn off the 'overscan' feature, so I now have a workable area on my screen. The system boots in the wayland/weston desktop, which looks very nice, and seems to be working smoothly. The commands in the menu are for setting Bluetooth and Wi-Fi, and some basic things like gedit and a terminal. The la ...
pmansvelder

The Maaxboard

Posted by pmansvelder Apr 11, 2020
I have received the Maaxboard this week, and I can finally start testing. I was afraid shipping would be affected by the Corona measures, but it came by UPS, and there was no hassle at all.   The Unboxing The maaxboard came in a plain brown cardboard box, with all the specified items neatly packaged: the Maaxboard a 5V/3A power supply with several adapters for the different plugs, including (luckily) the Dutch one a 16GB micro-SD card (Neat!) a long and sturdy HMDI cable (even neate ...
I have a number of store bought cables of varying lengths I will test with. I will document those in my review. In addition, I will construct a maximum length CAT5 cable using crimping tools and connectors I have locally.   I have a basic pin out cable tester for CAT5 cables. I don’t have a Fluke network analyzer to do performance checks to prove out my cable assembly skills. I worked in cable plants for a number of years, so I consider my cable construction skills up to specificati ...
I'm doing a little white boarding for testing.   I would like to load the Pi power supply so that it draws the maximum current possible before I go to PoE. That maximum draw state becomes my test condition when operating from the PoE. This configuration would put the maximum strain on the PoE Hat under test. My thought is a maximum CAT5 cable length while under maximum draw is a good performance check for the unit.   Powering LED’s connected to all GPIO’s and taxing all C ...
After I received notice that my application was accepted, I confirmed the requirement for additional parts that would be needed in order to complete the RoadTest. A PoE power supply is not provided as part of the RoadTest. I do not have a PoE capable networking device. It was my assumption when I submitted the application I would need to purchase such a device if awarded the review. Now that I have confirmation it is off to Newark to make a purchase. I don’t have the PoE Hat unit to det ...

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