We disassembled a dual-channel triple-core domestic portable oscilloscope

aleksib

We disassembled a dual-channel triple-core domestic portable oscilloscope [Copy link]

FNIRSI-1013D is a cost-effective dual-channel flat panel oscilloscope launched by FNIRSI with comprehensive functions for the maintenance industry and R&D industry. Although it has been sold to the public for some time, I still decided to buy one, disassemble it, and introduce this oscilloscope to you from the hardware perspective.

From the official introduction of FNIRSI, this oscilloscope uses words such as "small and portable" in its promotion, so I guess the oscilloscope should have a built-in lithium battery for continuous power supply; the oscilloscope uses a TFT LCD screen for display, so I guess there is a dedicated processor inside to be responsible for the display, and there is also another processor dedicated to processing digital signals. We don’t know the real internal structure yet, and we have to wait until we disassemble it to find out.

Unboxing

FNIRSI 1013D Package Contents:

1 FNIRSI 1013D oscilloscope
2 100MHz probes (optional 1X and 10X)
1 USB data cable
1 charging adapter
1 instruction manual

FNIRSI-1013D uses a fully laminated 7-inch 800*480 resolution color TFT LCD screen, and also uses a capacitive touch screen to replace the old fingernail-style resistive touch screen, which also makes the touch screen operation more agile.

There are two input channels on the top of FNIRSI-1013D. Both input channels have built-in high-voltage protection modules, which can carry voltage inputs up to 400V. The oscilloscope can measure two different signals at the same time and compare and judge the two signals on the display screen, such as comparing and analyzing the input and output signals of the power amplifier unit. Compared with the single-channel design, the dual-channel design has a wider range of applications.

Next to the input channel is the USB Type-c port for power supply and the switch button, which are also the only few external interfaces and buttons of this portable oscilloscope.

Disassembly

The FNIRSI 1013D is equipped with a 6000 mAh lithium-ion battery, and the product manual states that a full charge can provide 4 hours of continuous use.

The hardware architecture uses the same ARM+FPGA+high-speed ADC solution as the desktop computer to replace the low-cost CPU direct procurement solution. As I guessed before, the oscilloscope uses the ANLOGIC/Anlu Technology FPGA chip EF2L45LG144B and two ADCs with the silk screen polished off to process digital signals. However, according to the comments on EEVBlog (overseas electronic forum), we can know that this is AD9288, and the display part uses Allwinner F1C100s to drive the TFT screen.

Allwinner F1C100s is a classic IC. There are many mature mass-produced products in solutions that need to drive screens, such as story machines, speakers with screens, and smart handheld game consoles. At the same time, F1C100s is also a low-cost IC solution that geeks love to choose when doing DIY. F1C100s can often be seen in DIY products such as handheld game consoles and business cards.

Practical Use

FNIRSI-1013D provides a one-key automatic adjustment function, avoiding tedious manual adjustment. The dual-channel display also facilitates real-time comparison of waveforms. In addition, the oscilloscope also provides three different trigger modes: automatic, single, and normal. The automatic mode can be used to process sudden non-periodic mutation signals, the single mode is used to process non-periodic digital logic signals, and the normal mode is used to process periodic analog signals.

According to the comments below the post, we know that the purple line on the screen when testing the waveform is actually the FFT spectrum, and you can control whether to display the FFT spectrum on the oscilloscope as needed.

Another comment pointed out the problem of measuring the bandwidth and sampling rate of the oscilloscope. According to the actual measurement videos of other bloggers, the actual bandwidth and sampling rate of the oscilloscope are slightly different from the official parameters. Even if the parameters are slightly insufficient, many developers will still choose to buy this oscilloscope when compared with other portable oscilloscopes.

FNIRSI-1013D has built-in 1GB of storage space. You only need to click on the screenshot on the screen to save the currently displayed waveform. You can also export the waveform image on the computer via USB connection.

lugl4313820

This is pretty good. What’s the price range? Is it affordable?

秦天qintian0303

It feels pretty good, portable

中国商风

FAE is more convenient to use for temporary on-site support

laker2008

This is a must-have for every hardware person on a business trip. Unfortunately, the battery is not very durable. It will break down after a while. It can only be used with a plug.

colorjun

I guess the bandwidth is not high, and it should be OK to use a clock signal of tens of MHz