In the last blog post, I did a teardown of a UNI-T MSO2304X 300 MHz – a quad channel mixed signal oscilloscope. And in this post, let’s take a look at what’s inside of an MSO3054X, a 500 MHz oscilloscope from UNI-T. A review video of this MSO3054X oscilloscope is linked below.

As I expected, the main board is pretty much identical to that in the MSO2304X, here are the two main boards side by side. The main board for the MSO2304X is on the left, and the main board for the MSO3054X is on the right. Can you spot any differences?

Here are the pictures of the four input channels. I was somewhat surprised to find that UNI-T used almost the exact components as in the MSO2304X. Here you can find the same LMH6518 which is a 900 MHz digitally controlled variable gain amplifier, it has very fast rime time of less than 500 ps. The high speed opamp, the BUF802 is also the same. It has a gain bandwidth of 3.1 GHz.

The only difference seems to be the 8 pin chip marked below, in each of the channels, the chip in the MSO2304X is marked as TI38 4HV (left) whereas the chip in the MSO3054X is mared as TI41 4HV (right). These pictures are for channel four.

The picture to the left below is the circuitry between the signal generator section and the oscilloscope channel one input section. Like the MSO2000X series, in the MSO3000X series, the scope probe compensation test signals can be configured to output different frequencies. Each of the test output ports can be configured to output 10 Hz, 100 Hz, 10 kHz and 100 kHz square waves. The picture to the right below is the signal generator output sections for the two independent arbitrary waveform generators. This section is identical between the 2000X and the 3000X series.

The MSO3054X also uses the same ADC (ADC08D1000) and the clock jitter attenuator chip (HMC7044).

The same Xlinx KINTEX-7 XC7K325T FPGA is used. The sample memory in the MSO3054X is also identical to what’s included in the MSO2304X. I was somewhat surprised by that as the MSO3054X is specified with higher waveform depth. So may be the hardware is identical, but the memory depth was limited in the firmware of the MSO2304X.

The only real difference between the MSO2000X and the MSO3000X seems to be the wifi module.

Here are the four ADCMP562 PECL high speed comparators on the top side of the board. There are four additional ones at the bottom side of the board and these are used for the digital channels.

The same Rockchip RK3568 is used in the MSO3054X.

Here is the cooling fan used in the MSO3054X, it is used for the main FPGA. The fan seems to be the same in many UNI-T products, including the UT8805E and UT8806E bench multimeters and the MSO2304X. The fan is unfortunately on the louder side, but this particular fan in the MSO3054X seems to be reasonably quiet.

Here are a few pictures showing the reverse side of the PCB. Again, it looks identical to the MSO2304X.

Here is a close-up of the TCXO:

Here is the encoder board:

And here is the keypad board. Both the encoder board and the keypad board are the same as the ones used in the MSO2304X.

The BNC board is different in the MSO3054X as in this model, it has the probe interface and supports active probes.

Here is the teardown video: