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RoadTests & Reviews

5 Posts authored by: waleedelmughrabi
Part 4 of R&S NGP814 Power Supply - Review   This part of the review focuses on transient behaviour, the Rigol DL3021 electronic load is used to generate the various load conditions used in the experiments. The table below is from the NGP814 datasheet, the T90 rise time value is below 10ms.     To get a feel of the rise time over the rated power range the following tests were done using Channel 1 at various percentages of the rated power (200W). [Note: all measurements ...
Part 3 of R&S NGP814 Power Supply - Review   Static Load:   Two chassis mount resistive loads from TE were used for these tests. They are wirewound resistors in a large ceramic core, they have many uses, I have a few that I use as a dump load while testing capacitor banks, rail-gap switches and inverters. The first resistor is supposed to be 1ohm with 5% tolerence but it is measured at 1.3 ohm, the second is 47 ohm 5% measured at 48.05765 ohm as seen in the photos below.  ...
Part 2 of R&S NGP814 Power Supply - Review   It is important for any power supply to be able to maintain the output level independant of the load variation. The NGP814 load regulation test is shown below.   Channel 1 @32V, 6.25A:   A- Using the built in multimeter in the DL3021 = [(31.9943V - 31.8313V) / (31.8313V) ] x 100% = 0.5120746%   B- Using DMM6500 = [ (32.00127V - 32.00333V) / (32.00333V) ] x 100% = - 0.00643683% The negative value indicates a lead ...
Part 1 of R&S NGP814 Power Supply - Review   Overview and User Interface   Compared to many other devices I have used the user interface of the NGP814 is by far the most user friendly. It offers easy access to all settings and designed with ease of navigation between menus in mind. I tried to cover most of the menus in the photos below (some menus are seen twice, while I scrolled down to show all the option to select from).   A- Device menus First is the generic device s ...
Getting started with the STM32H7B3I-DK Posted to support the STM32H7B3I-DK -  DISCOVERY KIT roadtest.   The following items are recommended by ST to explore and test the various features of the STM32H7B3I-DK: Java 8.241 STM32CubeIDE 1.3.0 STM32CubeMX 5.6.0 STM32CubeProgrammer 2.4.0 TouchGFX Designer 4.13.0 STM32Cube_FW_H7_V1.7.0 X-CUBE-TOUCHGFX   TouchGFX Designer It is a user friendly software to facilitate creating graphics, especially for touchscreen displays. It ...

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