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Instek GDS-3502 500MHz 2-channel, Color LCD Display DSO

Instek GDS-3502
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500MHz, 2 CH, Visual Persistence DSO


  • 500 MHz Bandwidth
  • 2-Channels
  • 4GSa/s real-time sampling rate and 100GSa/s equivalent time sampling rate
  • 25k points memory for each input channel
  • VPO (Visual Persistence Oscilloscope) technology to display less-frequently- appeared signals
  • 8 inch 800 x 600 high resolution TFT LCD display
  • Unique split screen system with independent setting for each signal channel
  • Three input impedance selection 50 /75 /1M
  • Optional power measurement software for power supply measurement and analysis
  • Optional serial BUS triggering, decoding software supporting I²2 C, SPI and UART
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List Price: $3,994.00
Sale: $3,393.95
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Instek GDS-3352 350 MHz 2 Channel Color Digital Storage Oscilloscope
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Instek GDS-3000 2-Channel, Visual Persistence Oscilloscope

Instek GDS-3502 Digital Oscilloscopes 500MHz 2-channel Color LCD Display DSO Instek GDS-3502 GDS 3502 GDS3502

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Product Information

GDS-3502 500MHz, 2-Channel, Digital Storage Oscilloscope


Instek GDS-3000 Series 2-Channel, Digital Storage Oscilloscope

  • 4GSa/s real-time sampling rate
  • VPO waveform processing
  • Unique split window function
  • Flexible application modules
  • 64 MB internal flash memory
  • Large 8’’ 800 x 600 high-resolution TFT LCD
  • High sampling rate: up to 5GSa/s real-time (4GSa/s GDS-350X), 100GSa/s equivalent-time
  • Deep memory: 25k points record length
  • Minimum 2ns peak detection

GDS-3000 Series Digital Storage Oscilloscope


A Hi-tech DSO Platform

The GDS-3000 Series is a new platform of 4-input channels, 500MHz bandwidth, 5GSa/s sampling rate, and VPO waveform display. The split screen feature has been designed to meet the requirements of multi-window & multi-signal tests in the research and the manufacturing fields. The optional power analysis software and the optional serial bus analysis software are available to facilitate the engineer's tasks in testing and manufacturing of the associated products.

Three new differential probes, GDP-025, GDP-050 & GDP-100, and two new current probes, GCP-005 ,GCP-020 ,GCP-100 and GCP-530 & GCP-1030, are coming along with the GDS-3000 Series to provide total solutions for a wide variety of applications in the industry, service and education market sectors. The GDS-3000 Series, a high-tech platform carrying thoughtful features, brings very high customer value to both general purpose market and professional market.

VPO- Visual Persistence Oscilloscope Signal Processing Technology



VPO- Visual Persistence Oscilloscope Technology

The GDS-3000 Series equipped with VPO signal processing technology and
5GSa/s high speed real-time sampling rate, allows you to view the signal clearly.

Unique Split Screen Function



The Unique Split Screen Feature of GDS-3000 Series


The unique split screen feature of GDS-3000 Series allows each input channel to be operated independently with respective setting and waveform display. The time base, the vertical sensitivity, and the trigger selections can be done by each channel separately, and the waveform of each input signal can be shown on the individual part of the screen. This nearly four-DSO-in one feature is very useful for the applications that need to simultaneously see the details of multiple waveforms with very different characteristics. The 8-inch high resolution 800x600 LCD display makes the split screen a pleasant observation environment to view the details of complex signals.

Complete Set of Triggering Functions



Complete Set of Triggering Functions

Besides Edge trigger, the GDS-3000 Series also offers various trigger functions, including Video, Pulse Width, Runt, Rise Time & Fall Time (specific time length), Alternate, Delay by Time, Delay by Event, and Hold-Off. The high sampling rate, the VPO signal processing & display, and the flexible trigger function all together make the GDS-3000 Series a powerful tool for waveform capture and display of various types of signals.

Auto Range for Both Time base and Vertical Scale



The Auto Range function automatically adjusts the time base and/or the vertical scale of displayed waveform when the frequency and/or the amplitude of input signal changed. This function gives user the convenience to have DSO always display waveform in a proper fashion on the screen tracking the frequency and amplitude changes of the input signal. It is especially useful when the user needs to alternately probe and test multiple circuit points containing signals with different frequencies and amplitudes.

Dual Display Window Zoom



Dual Display Window Zoom


The GDS-3000 Series Window Zoom function provides dual display mode to show the main waveform and the magnified section of zoomed-in waveform at the same time. Under "Zoom" mode, the width and the position of zoom-in window over the main waveform can be selected to get the magnified waveform as needed for detailed observation. To quickly and accurately move the zoom-in window to the expected position, the "Coarse" mode helps move the window to the needed position immediately and the "Fine" mode provides fine adjustment to precisely place the window in the exact position.


28 Automatic Measurements



28 Automatic Measurements :
The display modes include an individual mode and a Display All mode


The GDS-3000 Series supports simultaneous measurement of up to 28 waveform measurement items grouped into three main waveform parameters: amplitude, time and delay measurements. The display modes include an individual mode and a Display All mode. The former can display any 8 of the automatic measurements while the later can display all the automatic measurements for a channel.

FFT Test Function



FFT Test Function


To observe fundamental and harmonic frequency components of a signal, the FFT function on a digital storage oscilloscope is often used. Typically the traditional unit of the FFT is decibel (dB). However, when using dB it is sometimes difficult to identify the fundamental frequency of a signal from a noisy spectrum. With FFTrms function, the GDS-3000 Series can clearly display the fundamental frequency of an acquired waveform. The FFT function of GDS-3000 supports Rectangular, Hamming, Hanning, and Black-harris windows.


Three Input Impedance Selections



Three input impedance, 1M , 75 , and 50 are available for user's selection. The flexibility of impedance selections, including 1M to get minimum loading effect, 75 to accommodate Video transmission applications and 50 to fit RF communication applications, extends the GDS-3000 Series utilization range.

X-Y Mode



X-Y Mode


The X-Y mode of GDS-3000 defines CH1 and CH3 as the horizontal axis and CH2 and CH4 as the vertical axis, allowing the display of 2 sets of X-Y pattern simultaneously. The measurement items include Rectangular, Polar, Product and Ratio that fits most of the popular X-Y applications.


The X-Y pattern and the time domain waveforms can be shown on the screen simultaneously. Two cursors on the time domain waveforms allow the identification of cursor-associated locations on the X-Y pattern display.


Extendable Application Software



Extendable Application Software


The GDS-3000 Series allows future installation of additional application software at the user site. This provides an open environment for optional software upgrade and additional feature built-in in whenever the GDS-3000 Series user has the need. The flexibility of software installation platform keeps the DSO being in use always up-to-date.


Waveform File Preview



Waveform File Preview


The GDS-3000 provides an optimized operation interface for viewing screen captures. Generally, the oscilloscope may store large amounts of waveform data after a long period of time. To help prevent engineers from selecting the wrong file from a large number of stored waveform files, the screen capture preview function can be used to preview the waveform file without opening files so that operation of the oscilloscope is more efficient and convenient.


Free Remote Control Software



Using a USB port coupled with FreeWave remote monitoring software is the easiest and most convenient way to capture data from the GDS-3000 Series. With FreeWave, a screenshot can be saved as an image file (.bmp/.jpg), waveform data (.csv) can be logged and movie files(.wmv) can be recorded in real-time. Not only can FreeWave monitor and record waveforms over a long period of time, but previously recorded waveforms can also be observed. Instrument settings can even be configured without the need to learn incomprehensible command line syntax. With the simple user interface and robust features, FreeWave allows you to get the most out of the GDS-3000 with little effort.

Various Interface Support



Two high-speed USB 2.0 Host ports located in both front panel and rear panel are used for easy access of stored data. In the rear panel, a USB Device port is available for remote control and hardcopy print-out through a PictBridge compatible printer. RS-232 and LAN interfaces are provided as standard for system communication & ATE applications.

A SVGA video output port allows the transfer of DSO screen image to an external projector or monitor for remote monitoring or big screen observation. A GPIB to USB adaptor is available as an option for interface conversion though the USB Device port in the front panel.

Serial Bus Analysis Software Supporting 12C, SPI and UART (Optional)



Serial Bus Analysis Software

Serial Bus Analysis Software

The GDS-3000 Series provides two dedicated key

The GDS-3000 Series provides two dedicated key

With serial bus technology being widely used in embedded applications, the proper triggering and analysis of flowing data, control signal and associated pulse waveforms in serial bus communication has been a difficult job and challenge to design engineers. The Serial Bus Analysis software of GDS-3000 Series carries complete analysis tools for triggering and decoding of commonly used serial bus interfaces, including I2C, SPI and UART. Without spending time to study serial bus regulation details, the user only needs to set the trigger condition on GDS-3000 to get the data slots of interest.

Power Analysis Software For Power Supply Measurements (Optional)



Power Quality

Power Quality





In-rush Current

In-rush Current

The Power Analysis software contains four measurement functions, including Power Quality, Harmonics, Ripple and Inrush Current. The Power Quality analysis function allows the measurements of Voltage, Current, Frequency, Power and other quality related parameters for power source efficiency improvement. The Harmonics analysis function performs evaluation of power waveform distortion and gives harmonic test data for power source design and quality check. This function is complied with IEC 61000-3-2 standard. The Ripple measurement function, acquiring the ripple and noise overriding the DC waveform, is used to evaluate the DC power source quality. The Inrush Current measurement function is used to measure the power-on surge current, which may cause the damage of the device circuit.

What's In The Box

  • User manual
  • Power cord
  • GTP-501R 500MHz (10:1) Passive Probe (one per channel)


Model GDS-3152 GDS-3154 GDS-3252 GDS-3254 GDS-3352 GDS-3354 GDS-3502 GDS-3504
Input Channels 2Ch+EXT 4Ch+EXT 2Ch+EXT 4Ch+EXT 2Ch+EXT 4Ch+EXT 2Ch+EXT 4Ch+EXT
Bandwidth DC~150MHz(-3dB) DC~250MHz(-3dB) DC~350MHz(-3dB) DC~500MHz(-3dB)
Rise Time 2.3ns 1.4ns 1ns 700ps
Vertical Resolution 8 bits
Vertical Resolution@ 1MΩ 2mV~5V/div
Vertical Resolution@ 50/75Ω 2mV~1V/div
Input Coupling AC, DC, GND
Input Impedance 1MΩ// 16pF
DC Gain Accuracy +(3% X |reading| + 0.1div+ 1mV)
Polarity Normal and inverted
Maximum Input Impedance @1MΩ 300V (DC+AC peak), CAT I
Maximum Input Impedance @50/75Ω 5 Vrms ,CAT I
Offset Position Range 2mV/div ~ 100mV/div: 0.5V
200mV/div ~ 5V/div: 25V
Bandwidth Limit 20MHz (-3dB) 100MHz (-3dB) 200MHz (-3dB) 20MHz/ 100MHz/ 200MHz/ 350MHz (-3dB)
Waveform Signal Processing Addition, Subtraction, multiplication, division, FFT, FFTrms
Source Dual channel: CH1, CH2, Line, Ext ; 4 channel: CH1, CH2, CH3, CH4, Line, Ext
Trigger Mode Auto (Auto (supports Roll Mode for 100 ms/div and slower), Normal, Single
Trigger Type Edge, Pulse Width, Video, Runt, Rise & Fall, Alternative, Event-Delay (1~65,535) events, Time-Delay(10nS~10S), I2C, SPI, UART
TriggerHold-off Range 10ns~10s
Coupling AC, DC, LF rej, HF rej, Noise rej
Sensitivity DC~50MHz approx. 1div or 1.0mV
50MHz~150MHz approx. 1.5div or 15mV
150MHz~350MHz approx. 2div or 20mV
EXT Trigger
Range 15V
Sensitivity DC~150MHz pprox.100mV
150MHz~250MHz approx. 150mV
250MHz~350MHz approx. 150mV
Input Impedance 1MΩ3%, ~16pF
Range 1ns/div~100s/div (1-2-5steps); ROLL: 100ms/div~100s/div
Pre-Trigger 10div maximum
Post-Trigger 1,000div
Accuracy 20 ppm over any 1 ms time interval
Signal Acquisition System
Real Time Sample Rate 2.5GSa/s 5GSa/s 2.5GSa/s 5GSa/s 5GSa/s 5GSa/s 4GSa/s 4GSa/s
Equivalent Time Sample Rate 100GSa/s maximum for all models
Record Length 25k points
Acquisition Mode Normal, Average, Peak Detect, High resolution, Single
Normal: Acquire sampled values
Average: From 2 to 256 waveforms included in average
Peak Detect: Catches glitches as narrow as 2ns at all sweep speeds
Hi Res: Real-time boxcar averaging reduces random noise and increases vertical resolution
X-Y Mode
X-axis input Channel 1; Channel 3
Y-axis input Channel 2; Channel 4
Phase Shift 3 at 100kHz
Cursors and Measurement
Cursors Amplitude, Time, Gating available
Automatic Measurement 28 sets: Vpp, Vamp, Vavg, Vrms, Vhi, Vlo, Vmax, Vmin, Rise Preshoot/ Overshoot, Fall Preshoot/Overshoot, Freq, Period, Rise Time, Fall Time, Positive Width, Negative Width, Duty Cycle, Phase, eight different delay measurements (FRR, FRF, FFR, FFF, LRR, LRF, LFR, LFF)
Cursors Measurement V, T
Auto Counter 6digits, range from 2Hz minimum to the rated bandwidth
Power Measurements (optional)
Power Quality Measurements VRMS, V Crest Factor, Frequency, IRMS, I Crest Factor, True Power, Apparent Power, Reactive Power, Power Factor, Phase Angle.
Harmonics Freq, Mag, Mag rms, Phase, THD-F, THD-R, RMS
Ripple Measurements Vripple, Iripple
In-rush Current First peak, second peak
Control Panel Functions
Autoset Single-button, automatic setup of all channels for vertical, horizontal and trigger systems, with undo autoset
Auto-Range Allows users to quickly move from test point to test point without having to reset the oscilloscope for each test point
Save Setup 20 sets
Save Waveform 24 sets
Display System
TFT LCD 8" TFT LCD SVGA color display (LED backlight)
Display Resolution 800 horizontal  600 vertical (SVGA)
Interpolation Sin(x)/x and equivalent time sampling
Waveform Display Dots, Vectors, Variable persistence, infinite persistence
Display Graticule 8 x 10 divisions
Display Brightness Adjustable
RS-232C port DB-9port
USB port 2 sets USB 2.0 high-speed host port; 1setUSB 2.0 high speed device port
Ethernet RJ-45 port, 10/100Mbps
VGAVideoPort DB-15port, SVGA monitor output
Line Output 3.5mm stereo output jack for Go/NoGo audio alarm
GPIB(Optional) USB to GPIB converter
Go/NoGo BNC Maximum 5V /10mA TTL open collector ouput
Kensington Style Lock Rear panel security slot connects to standard Kensington style lock
Power Source
LineVoltageRange AC 100V ~ 240V, 48Hz ~ 63Hz, Auto selection
Multi-language Menu Available
On-line Help Available
Time clock Time and Data ,Provide the Data/Time for saved data
Dimensions and Weight 400(W) x 200(H) x 130(D), approx. 4 kg.

Instek GDS-3502 Product Specifications Summary:
(for full specs please see the full specs tab or the data sheet)

Oscilloscopes/Digital Oscilloscopes Template

Bandwidth What's This?500 Mhz
Sampling Rate What's This?4 GS/S
Memory What's This?25 kB
Rise Time What's This?700 ps (0.7 ns)
Screen Type (Oscilloscopes)LCD, TFT/LCD
Screen Size8 IN
Bits What's This?8
Battery OptionsNo

Test Equipment General Attributes

Unique Features*Unique Split Screen System with Independent Setting for Each Signal Channel<br>*VPO Screen Technology
Warranty3 YEARS
Calibration IncludedFactory Calibration
Power Supply Voltage120V/220V Universal
Interfaces I/O LAN / Ethernet, RS-232, VGA or SVGA Out 
Product Weight4 KILOS (8.82 LBS)
Product Height200 MM (7.87 IN)
Product Length400 MM (15.75 IN)
Product Width130 MM (5.12 IN)
Country of OriginTaiwan



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Product: Instek GDS-3502
Location: California USA
Recommended: Yes

GW Instek GDS-3502

This is a terrific 'scope! It is very well made, has a large, bright, crisp screen, and has been easy to use. This is a high end 'scope, which I needed for its speed, but I am a novice user. What I found to be of greatest help is the excellent user manual, which came included. The TEquipment sales staff was helpful in the selection of this 'scope. Thank you!
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