Standard LAN and USB interfaces

Standard LAN and USB interfaces
Standard LAN and USB interfaces

A short review of the miniature oscilloscope DSO168 / FNIRSI-168, with good (for its price) frequency characteristics

In short: quite good, the declared characteristics are close to the measured ones, but there are problems with capturing a non-periodic signal and the settings are not saved when turned off.

Parameters - declared and measured

Analog band width: 20MHz (acceptable sine up to 15MHz, square wave 4-5MHz)
Maximum real time sampling rate: 50MS/s (correct)
Vertical sensitivity: 50mV/div ~ 200V/div
Horizontal time base range: 100mS/div ~ 100nS/div (more than 10mS/div is almost useless - brakes)
Maximum input voltage: 40V (1X probe), 800V (10X probe)
Storage depth: 384KB
Input resistance: 1M
ADC precision: 8 bits
Coupling mode: AC/DC
Trigger mode: continuous
Trigger edge: ascending / descending edge
External trigger voltage 0-40V
Display: TFT color display (resolution is similar to 128*160)
Power supply: 800mAh lithium battery (actually filled with 500mAh, current 0.2A. Operating time 3-4 hours)
Size: 73mm x 55mm x 10mm
Weight: 50g

Purchase/Delivery

Bought with a $4 coupon for 2400 rubles. Came quickly, in two weeks. Packed well, in a foam box and bubble wrap.
In addition to the oscilloscope itself, the kit includes a P6020 20MHz x10/x1 probe with a 3.5mm/BNC adapter, a mini USB charging cable and instructions in English and Chinese. In the instructions it is called DSO NANO3. And he's really small))

Appearance

The oscilloscope is assembled in a case from an mp3 player, which entailed some strange solutions - a 3.5 mm jack is used for the input, there is a hole on the back cover (it looks like it was left from an SD card slot) and inscriptions on the “menu” and “vol” buttons not relevant, in an oscilloscope it's just up and down.
However, in this price category the presence of a case is already not bad)) see for example.



Element base


Having unscrewed the screw and removed the back cover, we see the following - at the input there is an operational amplifier marked “OAAI”, perhaps this is , then a good ADC for “8-Bit, 50, 80, and 100 MSPS”, CPC1008N solid-state relays, 384KB buffer memory and processor “ARM® 32-bit Cortex®-M3 CPU Core – 72 MHz”.

The screen here is a regular TFT 1.8 inches 128*160, viewing angles are again usually mediocre. When using it, we will most often look at it from below at an angle and here the image remains acceptable (but on the right everything is bad).

Control

There are few modes, so it turned out quite acceptable. The central button switches between modes: main -> moving the oscillogram -> trigger settings.
In the main mode, the buttons up, down - adjust sensitivity, right, left - time characteristics.
It turns on by pressing the central button for a few seconds. It turns off by simultaneously pressing the center button and the down button.

Read more from the instructions

Measurements

About the parameters

“50MS/s” is 50 million samples per second, the number of times the ADC reads the signal. The oscilloscope will be able to show a sine wave with half this frequency, i.e. 25 MHz. But to show the shape of a complex signal, the harmonics must be visible, and here the signal frequency must be ten times less than the sampling frequency, no more than 5 MHz.

“Analog band width: 20MHz” shows the conditionally limiting frequency of the analog path - where the attenuation is 3dB. Instead of 1V we will see 0.7V.


For testing, DDS generator boards AD9850 - sine and square wave and Si5351A - only square wave but up to 200 MHz are used.

Let's start with low frequencies- everything is fine here.




Let's continue the test with a square wave of 1 and 4 MHz with a divider of 1/10. As you can see, 1 MHz is acceptable, although a bit noisy, but it is also the most sensitive mode. 4 MHz is worse, but you can guess the meander:




And even higher. The analog 7MHz output from the pixie looks good. A 10 MHz square wave is predictably indistinguishable from a sine wave. Well, as the frequency increases further, after 25 MHz we move into the second Nyquist zone (in fact, this is a mirror band) and the displayed sine wave begins to expand, so that 45 MHz looks similar to 5 MHz.







As you can see, with the periodic signal everything is fine and more or less corresponds to what was stated.

But with an aperiodic signal, everything is much worse. For the test we looked at the i2c bus. A packet with a duration of 10 ms was not always displayed and clearly not in the first increment, as the trigger was set. In the 0.5 ms mode it was shown in most cases, and at 10 ms in about half. There’s something the Chinese haven’t finished with the trigger...

As for the conclusion - despite the shortcomings, for its price it looks like the best option a small signal viewer (oscilloscope probe).

I'm planning to buy +22 Add to favorites I liked the review +58 +79

High sensitivity, versatility and excellent price - this is what distinguishes the oscilloscope RTC1000.

The oscilloscope's extensive feature set addresses a wide range of users, from electronics designers to service engineers and educators. Modern, high-performance technology in an extremely quiet design meets the high demands of today's customers. The oscilloscope series includes a wide range of upgrade options, providing true investment protection for the future.

Oscilloscope RTC1000 is an X-in-one instrument, combining the functions of an oscilloscope, logic analyzer, protocol analyzer, spectrum analyzer, digital pattern generator, function generator, digital voltmeter and component tester into one device.

Features of the RTC1002 oscilloscope:

High-end data capture hardware for accurate measurement results:

  • Sampling rate up to 2 Gsample/s;
  • Memory depth up to 2 million samples;
  • Measurement with low level noise thanks to the most modern ADCs.

Versatile measuring functions and fast receipt results:

  • Wide choose automatic measurement functions;
  • QuickView: Key results at the touch of a button;
  • Mask testing: easily create a new mask with a few keystrokes;
  • FFT: a simple way to analyze the spectrum of signals.

10-in-1 Oscilloscope:

  • Oscilloscope;
  • Logic analyzer;
  • Protocol Analyzer;
  • Signal and digital sequence generator;
  • Digital voltmeter;
  • Component tester;
  • Frequency analysis mode;
  • Mask compliance test.

Future-proof and scalable:

  • Free firmware updates;
  • Bandwidth upgrade as needed;
  • Serial bus analysis options via software keys.

Two displays instead of one:

  • 20 vertical divisions using a virtual screen to directly display up to 13 signals;
  • Minimized software menus to increase the horizontal viewing area of ​​oscillograms.

Embedded logic analyzer (MSO):

  • 8 additional digital channels;
  • Synchronous and time-correlated analysis of analog and digital components electronic systems;
  • Possibility of complete modernization.

Standard LAN and USB interfaces:

  • Seamless integration via MTP;
  • Remote display via local network.

Excellent Features:

  • Standard feature of component tester;
  • Loading time 7 seconds.

Frequency FFT analysis:

  • Standard function, 128 thousand points.

QuickView: Results at the touch of a button:

  • Graphic display of key measurement results for the active signal.

Auto-tuning function:

  • Automatic selection of vertical, horizontal and trigger settings for optimal viewing of active signals.

Document results at the touch of a button.

Built-in signal and digital sequence generator (up to 50 Mbit/s):

  • Outputs sine, square/pulse, ramp and noise signals;
  • Output of 4-bit digital sequences.

10-in-1 Oscilloscope:

Oscilloscope

Offering up to 2 MSample/s sampling rates and up to 2 MSample memory depth, the oscilloscope RTC1000 superior to any other device in its class. Data update rates exceeding 10,000 waveforms/s indicate a highly sensitive instrument that is guaranteed to capture any signal failures. The measuring functions of the device provide quick results(QuickView function), mask matching testing, FFT calculations, measurements using math and cursor functions, and automatic measurements (including statistical ones).

Logic analyzer

Option RTC-B1 transforms any device model RTC1000 to an intuitive mixed signal oscilloscope (MSO) with 8 additional digital channels. The oscilloscope captures and analyzes signals from analog and digital components of electronic systems - synchronously and with time correlation between channels. For example, using cursor measurements, you can easily determine the delay time between the input and output of an ADC.

Protocol Analyzer

Protocols such as I 2 C, SPI and CAN/LIN are often used to transfer control messages between integrated circuits. For oscilloscopes RTC1000 Universal options are available to provide synchronization and decoding for specific serial protocols. It is possible to selectively capture data and analyze relevant events and data. The hardware implementation ensures smooth operation and high refresh rates even for long samples. This is advantageous, for example, when capturing multi-packet serial bus signals.

Signal and digital sequence generator

Built-in signal and digital sequence generator RTC-B6 with a formation speed of up to 50 Mbit/s will be useful for training purposes and the implementation of prototype equipment. Besides standard forms: sine, square, pulse, triangle, sawtooth, it allows you to output 4-bit digital sequences, including arbitrary ones. Digital sequences can be imported or created directly on the oscilloscope. Before playing signals, you can preview them to quickly check that they are correct. Predefined digital sequences are available, for example for I 2 C, SPI, UART and CAN/LIN bus signals.

Digital voltmeter

For simultaneous measurements, an oscilloscope RTC1000 equipped with a three-digit digital voltmeter (DVM) and a six-digit frequency meter for each channel. Supported measurement functions include DC voltage, AC and DC RMS, and AC RMS.

Component Tester

Users will also benefit from the built-in component tester. Measurement frequencies of 50 Hz and 200 Hz are available to support potentially time-consuming troubleshooting of faulty components. And since a picture can tell more than a thousand words - or rather, a thousand meanings - you can immediately see the result of the error analysis.

Frequency analysis mode

Hard-to-detect glitches are often the result of interactions between timing and frequency signals. Instrument FFT function RTC1000 activated by pressing a button and entering the center frequency and span values. Due to the high performance of the FFT function in oscilloscopes RTC1000 Signals up to 128 thousand points in size can be analyzed. To others practical tools include cursor measurements and an automatic measurement setup function in the frequency domain.

Mask Compliance Test

Mask tests provide rapid identification of whether a specific signal is within specified tolerance limits. Masks serve to evaluate the quality and stability of the device under test based on statistical analysis matches or does not match the mask. The result is rapid detection of signal anomalies and unexpected results. If the mask is violated, the measurement stops. Each violation generates a pulse, which is output to the AUX-OUT output connector of the device RTC1000. This output signal can be used to trigger various actions in the measurement setup.

A short review of the miniature oscilloscope DSO168 / FNIRSI-168, with good (for its price) frequency characteristics

In short: quite good, the declared characteristics are close to the measured ones, but there are problems with capturing a non-periodic signal and the settings are not saved when turned off.

Parameters - declared and measured

Analog band width: 20MHz (acceptable sine up to 15MHz, square wave 4-5MHz)
Maximum real time sampling rate: 50MS/s (correct)
Vertical sensitivity: 50mV/div ~ 200V/div
Horizontal time base range: 100mS/div ~ 100nS/div (more than 10mS/div is almost useless - brakes)
Maximum input voltage: 40V (1X probe), 800V (10X probe)
Storage depth: 384KB
Input resistance: 1M
ADC precision: 8 bits
Coupling mode: AC/DC
Trigger mode: continuous
Trigger edge: ascending / descending edge
External trigger voltage 0-40V
Display: TFT color display (resolution is similar to 128*160)
Power supply: 800mAh lithium battery (500mAh actually filled, current 0.2A. Operating time 3-4 hours)
Size: 73mm x 55mm x 10mm
Weight: 50g

Purchase/Delivery

Bought with a $4 coupon for 2400 rubles. Came quickly, in two weeks. Packed well, in a foam box and bubble wrap.
In addition to the oscilloscope itself, the kit includes a P6020 20MHz x10/x1 probe with a 3.5mm/BNC adapter, a mini USB charging cable and instructions in English and Chinese. In the instructions it is called DSO NANO3. And he's really small))

Appearance

The oscilloscope is assembled in a case from an mp3 player, which entailed some strange solutions - a 3.5 mm jack is used for the input, there is a hole on the back cover (it looks like it was left from an SD card slot) and inscriptions on the “menu” and “vol” buttons not relevant, in an oscilloscope it's just up and down.
However, in this price category the presence of a case is already not bad)) see for example dso188.



Element base

Having unscrewed the screw and removed the back cover, we see the following - at the input there is an operational amplifier marked “OAAI”, perhaps this is , then a good ADC for “8-Bit, 50, 80, and 100 MSPS”, CPC1008N solid-state relays, 384KB buffer memory and processor “ARM® 32-bit Cortex®-M3 CPU Core – 72 MHz”.

The screen here is a regular TFT 1.8 inches 128*160, viewing angles are again usually mediocre. When using it, we will most often look at it from below at an angle and here the image remains acceptable (but on the right everything is bad).

Control

There are few modes, so it turned out quite acceptable. The central button switches between modes: main -> moving the oscillogram -> trigger settings.
In the main mode, the buttons up, down - adjust sensitivity, right, left - time characteristics.
It turns on by pressing the central button for a few seconds. It turns off by simultaneously pressing the center button and the down button.

Read more from the instructions

Measurements

About the parameters

“50MS/s” is 50 million samples per second, the number of times the ADC reads the signal. The oscilloscope will be able to show a sine wave with half this frequency, i.e. 25 MHz. But to show the shape of a complex signal, the harmonics must be visible, and here the signal frequency must be ten times less than the sampling frequency, no more than 5 MHz.

“Analog band width: 20MHz” shows the conditionally limiting frequency of the analog path - where the attenuation is 3dB. Instead of 1V we will see 0.7V.

For testing, DDS generator boards AD9850 - sine and square wave and Si5351A - only square wave but up to 200 MHz are used.

Let's start with low frequencies - everything is fine here.



Let's continue the test with a square wave of 1 and 4 MHz with a divider of 1/10. As you can see, 1 MHz is acceptable, although a bit noisy, but it is also the most sensitive mode. 4 MHz is worse, but you can guess the meander:



And even higher. The analog 7MHz output from the pixie looks good. A 10 MHz square wave is predictably indistinguishable from a sine wave. Well, as the frequency increases further, after 25 MHz we move into the second Nyquist zone (in fact, this is a mirror band) and the displayed sine wave begins to expand, so that 45 MHz looks similar to 5 MHz.





As you can see, with the periodic signal everything is fine and more or less corresponds to what was stated.

But with an aperiodic signal, everything is much worse. For the test we looked at the i2c bus. A packet with a duration of 10 ms was not always displayed and clearly not in the first increment, as the trigger was set. In the 0.5 ms mode it was shown in most cases, and at 10 ms in about half. There’s something the Chinese haven’t finished with the trigger...

As for the output - despite the shortcomings, for its price this seems to be the best option for a small signal viewer (oscilloscope probe).

Planning to buy 0 Add to favorites I liked the review 0

Rohde&Schwarz RTC1002- a digital oscilloscope, which is an X-in-one device, combining in one device the functions of an oscilloscope, logic analyzer, protocol analyzer, spectrum analyzer, digital sequence generator, function generator, digital voltmeter and component tester.

The oscilloscope's extensive feature set addresses a wide range of users, from electronics designers to service engineers and educators. Oscilloscopes in this series include a wide range of upgrade options.

Peculiarities:

1. High-end data capture hardware for accurate measurement results

  • Sampling rates up to 2 Gsample/s
  • Memory depth up to 2 Msample
  • Low noise measurement thanks to the latest ADCs
  • Versatile measuring functions and fast results

2. Wide range of automatic measurement functions

  • QuickView: Key results at the touch of a button
  • Mask testing: easily create a new mask with a few keystrokes
  • FFT: a simple way to analyze the spectrum of signals

3. 10-in-1 oscilloscope

  • Oscilloscope
  • Logic analyzer
  • Protocol Analyzer
  • Signal and digital sequence generator
  • Digital voltmeter
  • Component Tester
  • Frequency analysis mode
  • Mask Compliance Test

4. Future-proof and scalable

  • Free firmware updates
  • Bandwidth upgrade as needed
  • Serial bus analysis options via software keys

Contents of delivery:

  • Oscilloscope
  • passive probe RT-ZP03 for each channel
  • power cable
Oscilloscope Specifications
Number of channels 2
Input impedance
1 MΩ ±2% in parallel with 24 ± 3 pF
Denouement By DC, By alternating current, grounding
Maximum input voltage 400 V
Vertical resolution 8 bit
Sensitivity 1 mV/div - 20 V/div
Bias ± 10 divisions
Input voltage range -16V - 16V (probe X1)
-160 V - 160 V (X10 probe)
Bandwidth 50 MHz
Sampling frequency single channel mode – 1 GS/s
dual channel mode – 500 MSa/s
Maximum equivalent sampling rate
50 GHz
Memory depth 25 kb
Record length 512 K select for each channel
Interpolation Sin(x)/x
Sweep factor
2 ns/div… 50 s/div
Rise time
≤ 7 ns
Sweep types automatic, standby, one-shot
Trigger delay range 80 ns...1.5 s
Synchronization
alternate, along the front, by impulse, by the slope of the front
additional external sync input (EXT)
Automatic measurements 28 parameters
Built-in frequency counter 6 bit, sensitivity 30V
Cursor measurements (ΔU, Δt, tracking)
Mathematical functions addition, subtraction, multiplication, division, FFT
Inner memory 20 waveform groups, 20 settings
External memory USB: 200 waveform groups,
200 screen groups of 1000 screens each
Data logging sampling, peak detector, averaging
General characteristics
Display diagonal 17.8 cm, color (TFT), 800 × 480 pixels
On-screen interface Russian, English, etc.
Data interfaces USB-enabled Flash memory and USB printer
Nutrition 100 - 240 V, 45/440 Hz
Power consumption less than 30 W
Protection class IP2X
Cooling forced ventilation
Dimensions 306 mm x 147 mm x 122 mm
Net weight 2200 g
Equipment digital oscilloscope UNI-T UTD2052CEX – 1 pc.
passive probe 1:1 (1:10) – 2 pcs.
USB cable- 1 PC
power cord food – 1 pc.
disk with software- 1 PC

UNI-T UTD2052CEX is a high-performance digital oscilloscope with 1 GSa/s sampling rate, 50 MHz bandwidth and 25 kB memory depth, allowing storage of up to 2000 waveforms per second. The device is easy to use and combines high standards safety, durable portable design, outstanding technical performance and many mathematical and analytical functions. The oscilloscope is equipped with a high-quality 7-inch color display with an increased oscillogram display area, a practical and convenient control panel, and an intuitive interface. There is also a function for synchronous measurements on two independent channels, automatic setting device and saving the results in different formats for further reproduction and analysis on a computer. UNI-T UTD2052CEX is an excellent test instrument various classes equipment, in-service maintenance, research and educational purposes.

Overview table

Model
Number of channels 2
Bandwidth 25 MHz 50 MHz 50 MHz 100 MHz 110 MHz 200 MHz
Sampling frequency 250 MSa/s 500 MSa/s 1 GS/s 1 GS/s 1 GS/s 1 GS/s
Memory depth 25 kb
Rise time ≤ 14 ns ≤ 7 ns ≤ 3.5 ns ≤ 1.8 ns
Waveform acquisition speed ≥ 2000 waveforms per second
Sensitivity 1 mV/div - 20 V/div 2 mV/div - 5 V/div
Sweep factor 10 ns/div - 50 s/div 5 ns/div - 50 s/div 2 ns/div - 50 s/div 20 ns/div - 50 s/div
Inner memory settings, waveforms, waveforms in Bitmap format
Trigger Modes Edge, Pluse,
Video, Alternate
Edge, Pluse,
Alternate
Edge, Pluse, Video, Slope, Alternate Edge, Pulse,
Video, Alternate
Data interfaces USB OTG,
Pass/Fail
USB OTG USB Host/Device,
LAN
Nutrition 100 - 240 V, 45 - 440 Hz
Display diagonal 7 (178 mm)
color LCD
400 × 240 pixels
diagonal 7 (178 mm)
color LCD
800 × 480 pixels
diagonal 5.7 (145 mm)
color LCD
320 × 240 pixels
Dimensions
306 mm x 134 mm x 122 mm 306 mm x 147 mm x 122 mm 320 mm x 150 mm x 130 mm