One Oscilloscope with Time Domain, Frequency Domain, and Power Measurement

The Instek GDS-3654A Digital Storage Oscilloscope features a bandwidth of 650 megahertz, four input channels, and the ability to upgrade the unit to a mixed signal oscilloscope with the DS3A-16LA 16-Channel Logic Analyzer Upgrade (not included). This unit features the memory length of each channel up to 200 million samples, the sampling rate of 5 gigasamples per second on half channels, and 2.5 gigasamples per second on all channels. The TFT LCD display is 10.2 inches in size and provides the user with a color display mode.

The Instek GDS-3654A Digital Storage Oscilloscope strengthens many functions and specifications required for oscilloscope measurements-- including the memory depth of up to 200 million samples per channel. The long memory allows users to maintain a high sampling rate even at low speed time settings. The waveform update rate is up to 200,000 waveforms per second and the segmented memory can capture and analyze up to 490,000 segments.

For measurement, the Instek GDS-3654A Digital Storage Oscilloscope incorporates the 'fine scale' function which allows users to fine-tune the vertical scale according to the requirements for achieving full scale measurement to improve measurement accuracy. The acquisition method combined with the high resolution mode allows for low-noise signals under high-bandwidth measurements.

In addition, this unit is equipped with both 1 megohm and 50 ohm input impedance selections which can be set according to different DUT measurement requirements in order to achieve the effect of impedance matching. The search function can quickly find the signals that meet the conditions according to the needs of the test. The cursor mark function allows users to clearly observe the voltage, current, time, and delta data of each point measured by the cursor. Via the indicator function, the measured range is shown at the specific section of the waveform.

For frequency domain measurement, the Instek GDS-3654A Digital Storage Oscilloscope is equipped with a dual-channel spectrum analyzer which allows users to measure and analyze the frequency domain signals of two channels at the same time. This unit is also equipped with a spectrogram function which allows users to easily observe complex frequency domain fluctuations that are proportionally decomposed into simple superimposed waves. This function allows the user to understand the signal strength distribution. The soft keys allow users to have more intuitive settings for operation for improved measurement efficiency.

The Instek GDS-3654A Digital Storage Oscilloscope provides rich measurement items for switch mode power supply testing.

The provided power supply test items include the AC input analysis items of power quality, harmonics, and inrush current. The DC output analysis required test items include ripple/noise, transient response analysis, turn ON/OFF, efficiency, control loop response (bode), and Power Supply Rejection Ratio (PSRR). The complete switching component analysis items include modulation, switching loss, Safe Operation Area (SOA), and magnetic analysis with B-H curve.

On the side of the Instek GDS-3654A Digital Storage Oscilloscope, a power supply for the GCP-530 50 megahertz Current Probe (not included) and the GCP-1030 100 megahertz Current Probe (not included) is provided. This feature saves users from requiring the power supply for current probes and eliminates the burden of carrying the power supply when working in the field.

The Instek GDS-3654A Digital Storage Oscilloscope is standardly equipped with a dual-channel 25 megahertz arbitrary waveform generator and the Frequency Response Analysis (FRA) function. The FRA includes the load function which can load multiple FRA measurement results for comparison. The user-definable shortcut keys can aid in improving measurement efficiency.

The Instek GDS-3654A Digital Storage Oscilloscope provides rich communication interfaces. This unit provides the standard interface of USB via the commonly used USB Host and USB Device port, LAN via the LAN port, and RS-232 via the highly stable RS-232 interface. GPIB interface is possible via the factory-installed DS3A-GPIB GPIB Interface Option (not included).

10.2 Inch, 8 Bits RGB Color Gradient Display

With respect to the waveform display technology, the Instek GDS-3654A Digital Storage Oscilloscope is capable of displaying RGB color gradients with 8 bits each which can delineate the profound gradational fluctuations. This display makes it seem as if it can recreate the analog oscilloscope display capability. When a composite signal is input, the GDS-3654A has the ability to precisely reveal the colored burst signal and to show details of layers with the brightness. The dull monochrome waveform is then imbued with vitality which allows users to easily determine and analyze waveforms.

200M Memory Depth per Channel Independently

The Instek GDS-3654A Digital Storage Oscilloscope has a powerful and incomparable memory depth for data retrieving. The 200 million samples memory depth per channel allows users to easily seize the waveform detail while conducting fundamental measurement applications.

Fine Scale Function

The 'fine scale' function is incorporated to allow users to fine-tune the vertical scale according to their needs. This function enables the unit to achieve full-scale measurement and improve the accuracy of the voltage or current measurements.

High Resolution Acquisition Mode

The acquisition method with high resolution mode is provided to effectively remove noise and improve the accuracy of automatic measurement.

38 Items of Auto Measurement Selection and Statistics Function

The Instek GDS-3654A Digital Storage Oscilloscope soundly provides 38 measurement items. Based upon the parameters such as voltage, current, time, frequency, and delay measurement, users can decide which measurement items to choose. On the single display screen, the GDS-3654A provides 8 measurement selections.

The statistics mode can also be selected for users to analyze the mean value, maximum, minimum, and standard deviation of the retrieved waveforms to ensure the signal's integrity and identify abnormal waveforms.

Users can use the 'measure shortcuts' function to select the item to be measured and store the selected item in shortcuts one through four. These shortcuts can then be easily selected to quickly conduct measurements for the same product for future applications. Users can simply select the previously stored shortcut without making new selections from 'add measurement,' and all the measurement items will be displayed on the screen to help improve the measurement efficiency.

490,000 Waveforms Segmented Memory

As the length of the sampling memory increases to 200 million samples, the number of acquisitions that can be set in the Instek GDS-3654A Digital Storage Oscilloscope's segmented memory at one time has also increased significantly. Up to 490,000 waveforms can be stored continuously under the condition of the memory length of 1,000 points.

The segmented memory allows users to capture and observe interesting waveforms. Through the statistical function, user are able to find sporadic problems in continuous events. In addition, the Instek GDS-3654A Digital Storage Oscilloscope incorporates the 'mask determination' function under segment which allows users to quickly analyze abnormal waveforms that exceed the target range.

Waveform Search Function

Users can rapidly search desired waveforms according to the trigger condition. After activating the search function, hollow inverted triangles will show the location which met the trigger condition. The upper left hand corner 'overall' will show the total number of waveforms that met the trigger condition. Users can set waveform search by the trigger condition such as edge, pulse width, runt, rise/fall, and bus.

Users can save all of the triangle marks to compare with the next input signal. The front panel of the Instek GDS-3654A Digital Storage Oscilloscope controls waveform zoom-out and the play/pause function to swiftly identify each desired event. This function allows users to conveniently complete waveform search and save marks for rapid comparison and analysis.

User Define Key

The Instek GDS-3654A Digital Storage Oscilloscope incorporates an 'user define' key to allow users to set any one of the ten functions of 'user define' based upon the measurement requirement.

These functions include XY/YT, reset all positions to 0, measure all ON/OFF, measure statistics ON/OFF, segments ON/OFF, AWG output ON/OFF, auto/normal, clear persistence, freeze display, and transparent readouts ON/OFF.

Users can quickly select the function setting via a simple press of the key to quickly meet the measurement needs and improve measurement efficiency.

Spectrum Analyzer Function

For frequency domain measurement, a dual-channel spectrum analyzer is equipped. Users can measure and analyze dual-channel frequency domain signals at the same time. This unit also includes the spectrogram function which allows users to easily observe the signal's strength distribution and the relationship of the spectrum distribution over time. The independent numeric key input on the panel makes the operation more convenient for users and improves the measurement efficiency. The dual-channel spectrum analyzer and spectrogram can test the frequency response of the left and right channels of the audio amplifier at the same time.

25 MHz Dual-Channel Arbitrary Waveform Generator

The Instek GDS-3654A Digital Storage Oscilloscope is standardly equipped with a 25 megahertz dual-channel Arbitrary Waveform Generator (AWG) and provides built-in sine, square, pulse, ramp, DC, noise, sinc, gaston, lorentz, exponential rise, exponential fall, haversine, cardiac, and other waveforms. Users can be directly input the amplitude and frequency of the signal through the numeric keys.

Users can select the arbitrary waveform function of the AWG to store the signal measured by the analog channel of the oscilloscope to the arbitrary waveform of the signal source (UAW file). The user can also directly output this signal from the signal generator. This function allows users to conveniently generate various measured signals to simulate diversified signal outputs.

PC Remote Control (Web Server Function)

The Instek GDS-3654A Digital Storage Oscilloscope has a built-in web server function to allow users to connect the unit's web server by using a browser in the same network domain via Ethernet connection. System information can be obtained and the oscilloscope screen can be observed and captured remotely.

The Instek GDS-3654A Digital Storage Oscilloscope can be controlled remotely through GUI to download and upload configuration files and test SCPI commands. Users can use this function to obtain oscilloscope information and configuration files along with operating via remote control even if they are not on-site.

Power Analysis Functions

In daily life, switching power supplies have become the mainstream source of power supplies. The Instek GDS-3654A Digital Storage Oscilloscope is the answer to improving product performance and reducing switching loss or ripple and noise.

The Instek GDS-3654A Digital Storage Oscilloscope has an option of rich measurement items for switching mode power supply testing. The rich measurement functions can help engineers save measurement computing time and improve product development efficiency.

For AC voltage and current measurement, the distortion and other abnormal phenomena will affect the power consumption, efficiency, and reliability of the power supply.

Measurement items of the power quality function includes current/voltage root mean square value, actual power, reactive power, frequency, power factor, phase angle, +/- V Peak, +/- I Peak, AC/DC voltage and current, voltage/current crest factor, impedance, resistance, and reactance.

This function measures the time required for the output DC voltage to reach the stable level expected by users when the output load changes suddenly.

Required test items for output analysis includes ripple/noise, transient response analysis, turn ON/OFF, and efficiency. This function measures the transient response value(s).

Users can analyze the integral of the product of the voltage and current of the switching device (MOSFET or IGBT) in the power supply. The user can then measure the switching loss of the device, including turn-on switching loss, turn-off switching loss, and conduction loss. The higher the switching frequency, the higher the turn-on and turn-off switching loss.

Required items for switching component analysis includes switching loss, Safe Operation Area (SOA), and modulation analysis. This function measures power loss, energy loss, and Rds(on)/Vce(sat).

Power Supply Rejection Ratio (PSRR) analysis is used to confirm that power equipment suppresses ripple noise in different frequency ranges.

This function measures frequency and PSRR (dB).

The characteristics of magnetic materials are divided into magnetic flux density (B), magnetic field strength (H), and material magnetic permeability (μ) iva magnetics analysis. The B-H diagram is usually used to verify the saturation of the magnetic components in the switch power supply.

This function measures the voltage and current flowing through the magnetic component and draws a B-H diagram.

Optional 16-Channel Logic Analyzer

The Instek GDS-3654A Digital Storage Oscilloscope can be upgraded to a Mixed-Signal Oscilloscope (MSO) via the DS3A-16LA 16-Channel Logic Analyzer Upgrade (not included). With several main units, the user can plug the DS3A-16LA in to other units at any time without installing any software. Users can analyze digital signals, I^2C, SPI, UART, CAN, LIN, and parallel bus through the logic analyzer.