Digital Storage Oscilloscope Logic Analyzer GDS-2000 Series & GLA-1000 Series Training MANUAL GW INSTEK PART NO.
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TABLE OF CONTENTS Table of Contents SAFETY INSTRUCTION .................................................... 5 OVERVIEW ...................................................................... 7 GDS-2000 TUTORIAL ....................................................... 8 GDS-2000 Overview ............................... 9 1. Power up GDS-2000 ......................... 11 2. Set up the Environment ................... 12 3. Connect and View a Waveform ......... 13 4. Measure the Waveform ....................
GDS-2000 Series Training Manual DAC Simulation ................................... 38 I 2 C Bus Analysis ................................... 41 SPI Bus Analysis .................................. 42 UART Analysis ..................................... 43 APPENDIX ...................................................................... 44 Sine Wave Frequency Adjustment ......... 44 Demo Board Signal List .......................
SAFETY INSTRUCTION SAFETY INSTRUCTION This chapter contains important safety instructions that you must follow when operating or storing the demo board designed for GDS-2000 and GLA1000. For safety instructions regarding GDS and GLA, refer to their user manuals. Safety Symbols These safety symbols may appear in this manual. WARNING Warning: Identifies conditions or practices that could result in injury or loss of life.
GDS-2000 Series Training Manual Safety Guidelines General Guideline Do not place any heavy object on the instruments. Avoid severe impacts or rough handling that leads to damaging the instruments. CAUTION Do not discharge static electricity to the instruments. Use only mating connectors, not bare wires, for the terminals. Do not disassemble the instruments unless you are qualified.
OVERVIEW OVERVIEW What this document is about This manual describes tutorials of GDS-2000 digital storage oscilloscope and demonstrations of advanced features in GDS-2000 and GLA series logic analyzers using the demo board. The following contents are included. GDS-2000 tutorial: This chapter teaches you basic functionalities of GDS-2000 in a step-by-step manner, from powering up to saving files.
GDS-2000 Series Training Manual GDS-2000 TUTORIAL The GDS-2000 tutorial is intended for novice users who are unfamiliar with GDS-2000 operation or oscilloscope in general. For theoretical aspects of oscilloscope, consult other resources. Below is the list of useful websites. Wikipedia oscilloscope entry (http://en.wikipedia.org/wiki/Oscilloscope) Oscilloscope tutorial (https://www.cs.tcd.ie/courses/baict/bac/jf/labs/scope/oscilloscope.
GDS-2000 TUTORIAL GDS-2000 Overview GDS-2000 series are generic purpose digital storage oscilloscope aimed at product design, quality assurance, and educational usage.
GDS-2000 Series Training Manual Panel overview 4-channel front panel 2-channel front panel Rear panel 10
GDS-2000 TUTORIAL 1. Power up GDS-2000 Here you will learn how to properly place and power up GDS-2000. 1. Place GDS-2000 on a flat, non-conductive surface and tilt stand it. Low angle High angle 2. Connect the power cord to the rear panel socket. 3. Turn On the main power switch on the rear panel. : On, Off. The ON/STBY indicator on the front panel turns red. : 4. Press the ON/STBY key. The indicator turns green and the display becomes active in 6 ~ 8 seconds. 5. Go to the next step.
GDS-2000 Series Training Manual 2. Set up the Environment Here you will learn how to setup measurement environment: select the menu language, reset GDS-2000, and adjust the display contrast. 1. Press the Utility key → F4 (Language). Press F4 repeatedly to select the menu language of your choice. Language Utility English F 4 2. Press the Save/Recall key → F1 (Default Setup) to reset GDS2000 front panel.
GDS-2000 TUTORIAL 3. Connect and View a Waveform Here you will learn how to connect the probe and automatically adjust the display scale. 1. Select x10 as the sensitivity on the probe to limit the input signal amplitude. 2. Connect the probe between Channel1 input terminal and probe compensation output terminal. X1 X1 0 3. Press the Auto Set key. The probe compensation signal waveform appears on the display. Auto Set 4. Go to the next step.
GDS-2000 Series Training Manual 4. Measure the Waveform Here you will learn how to automatically measure the voltage, frequency, and timing of the signal waveform. 1. Press the Measure key. GDS-2000 automatically measures five major attributes of input signal and displays them in the menu. Measure 2. Press the Measure key again, then F1 (CH1). The voltage, frequency, and timing of CH1 waveform appear on the display. Measure CH1 F 1 3. Press F5 (OFF) to cancel measurement and reset the display.
GDS-2000 TUTORIAL 5. Adjust Waveform Scale and Position Here you will learn how to manually change the horizontal and vertical scale and move the waveform position. 1. Turn the TIME/DIV knob clockwise by one notch to change the horizontal scale to 100us/div. 2. Turn the horizontal POSITION knob counterclockwise, until the waveform edge moves three divisions to the left. 3. Turn the Channel1 VOLTS/DIV knob clockwise by one notch to change the vertical scale to 20mV/div. 4.
GDS-2000 Series Training Manual 6. Compensate the Probe Here you will learn how to adjust probe sensitivity by compensating overshoot or undershoot. 1. Press the Acquire key → F3 (Average). Press F3 repeatedly until the average number becomes 16. Acquire Average 16 F 3 2. Adjust the probe to make the waveform edge flat. Under compensation Normal Over compensation 3. Press the Auto Set key and view the compensated waveform. Auto Set 4. Go to the next step.
GDS-2000 TUTORIAL 7. Save Data Using Hardcopy Function Here you will learn how to save the waveform data, waveform image, and panel setup into a USB flash drive. 1. Connect a USB flash drive to the front panel USB port. 2. Press the Utility key → F1 (Hardcopy) → F1 (Save All). Utility Hardcopy Menu F 1 Function Save All F 1 3. To invert the color of waveform image file, press F2 (Ink Saver). Ink Saver Off F 2 Ink Saver Off Ink Saver On 4. Press the Hardcopy key.
GDS-2000 Series Training Manual GDS-2000 ADVANCED Using the demo board designed specially for GDS-2000, you can verify and observe various GDS-2000 advanced functionalities for demonstration or your own education.
GDS-2000 ADVANCED Demo Board Overview The demo board is a signal generator board capable of producing waveforms which represent various real-life scenarios you might encounter. You can use the board as a training kit to learn how to properly view signals, or use it as a generic signal generator.
GDS-2000 Series Training Manual GDS-2000 Demonstration Setup Follow the below steps to properly power up and connect the demo board. Use step 5 ~ 8 to reset the board after each demonstration. 1. Power up GDS-2000. 2. Connect the USB cable to the demo board and GDS-2000 rear panel USB connector. 3. Select x10 as attenuation level, for both CH1 & CH2 probe. 4. Connect the probes between GDS-2000 CH1&2 and the Sine wave terminal on the demo board.
GDS-2000 ADVANCED 6. Press the CH2 key to activate CH2. CH2 CH2 7. Press the Display key → F1 (Vector) to select vector drawing. Display Type Vectors F 1 8. Press the Auto Set key. GDS-2000 automatically adjusts the horizontal, vertical, and trigger setting. Auto Set Now the display should look like the following: CH1 and CH2 showing 1kHz sine wave on top and bottom half of the display, respectively. 9. Continue with each demonstration.
GDS-2000 Series Training Manual 1GSa/s & Single Shot By using a very fast sampling rate combined with single shot trigger mode, you can accurately reconstruct weak signals which are buried in larger waveform. Here you can observe a tiny pulse sitting on top of PECL, 3.3V DC signal. Background Connection CH1 (BNC connector on the demo board) This demo uses a BNC to BNC cable instead of probe. 25ns/div, 50mV/div (1GSa/s) CH1 Scale 1. Press the CH2 key twice and turn it OFF. CH2 CH2 2.
GDS-2000 ADVANCED Run/Stop 5. Press the Run/Stop key several times and observe that the pulse signal amplitude and width remains stable, due to high sampling rate 1GSa/s. Run/Stop 6. Change the horizontal scale to 100ns/div. Due to the additional data memory requirement, the sampling rate falls from 1GSa/s to 250MSa/s. TIME/DIV 1GSa/s → 250MSa/s 7. Press the Run/Stop key several times and observe the pulse signal.
GDS-2000 Series Training Manual Automatic Measurement (Delay) Using the automatic measurement function, you can easily measure the waveform, including the time distance between two waveforms. Background Connection CH2 CH1 CH1/CH2 Scale 50ns/div, 200mV/div (if CH1 is still unstable, increase the trigger level) 1. Press the Measurement key to show the Measurement menu. Measure 2. Press F1 → F3 → F3 (Delay FRR) to select the measurement item.
GDS-2000 ADVANCED Automatic Measurement (Overshoot) Using the automatic measurement function, you can easily measure the waveform, including the rise and fall overshoot. Background Connection CH1 50ns/div, 100mV/div (if CH1 is still unstable, increase the trigger level) CH1 Scale 1. Press the Measurement key. The menu shows five types of measurement results. Measure 2.
GDS-2000 Series Training Manual Frequency Modulation (FM) Background Connection Observing an FM signal works best when short memory mode is selected, due to faster update. CH1 FM CH1 Scale 1us/div, 50mV/div 1. Move the CH1 waveform position to the center of the display, both horizontally and vertically, for clear view. 2. To get wider view, press the Menu On/Off key. The menu disappears and the horizontal range expands to 12div.
GDS-2000 ADVANCED Long Memory Background Connection CH1 Scale The long memory mode gathers more data for each acquisition. This mode is useful for observing details of single-shot signal like spike noise. CH1 5us/div, 100mV/div (If CH1 is still unstable, increase the trigger level) 1. At default, the memory is in short mode. Press the Run/Stop key, then use the TIME/DIV knob to zoom the waveform up to 250ns/div. Observe that the waveform edge appears flat.
GDS-2000 Series Training Manual Peak Detection Background The peak detection mode acquires the max and min amplitude in each signal acquisition. It is useful for catching abnormal glitches in the signal. Connection CH1 Scale CH1 10us/div, 100mV/div (If CH1 is still unstable, increase the trigger level) 1. A supposedly pure square waveform appears on the display, in the default Normal acquisition mode. 2. Press the Acquire key → F2 and select Peak detect acquisition mode.
GDS-2000 ADVANCED Peak Detection + Long Memory Background Connection CH1/CH2 Scale By combining Long memory and Peak detect functionalities, catching and observing details of single-shot signals become much easier. CH2 CH1 5ms/div, 100mV/div 1. Verify that in the default normal acquisition mode, waveforms are not clearly viewable. 2. Press the Acquire key → F2 (Peak Detect) to select the peak detect mode. The waveform outline becomes visible. Acquire Peak Detect F 2 3.
GDS-2000 Series Training Manual TIME/DIV POSITION Run/Stop 4. Set the horizontal scale back to 5ms/div and press the Run/Stop key again to re-start capturing the waveform. TIME/DIV Run/Stop 5. Press F5 (Mem Leng) and select long memory (12500). Mem Leng 500 F 5 Mem Leng 12500 F 5 6. Press the Run/Stop key to stop the waveform, and view the close-up again (500us/div), this time with more details.
GDS-2000 ADVANCED Pulse Width Trigger The pulse width trigger allows observing pulse signals in clear manner, even when several pulse widths are mixed in a single waveform. Background Connection CH1 250ns/div, 200mV/div (if CH1 is still unstable, increase the trigger level) CH1 Scale 1. The input signal contains several pulses with different width. In the default edge trigger mode, all pulses are mixed together. 2. Press the trigger MENU key → F1 (Type) and select Pulse.
GDS-2000 Series Training Manual Roll / Scan Mode Background Connection CH1 Scale For observation of slow signal (<20Hz), scan mode and roll mode are available, each with its own merit. CH1 250ms/div, 20mV/div 1. The CH1 triangle waveform will be displayed in SCAN mode, running from left to right. In this mode, old part of the waveform is gradually replaced by new data. 2. Press the HORIMENU key → F4 (Roll) to get a more complete viewing of the waveform.
GDS-2000 ADVANCED X-Y Mode Background The X-Y mode views the relationship between the amplitudes of two independent signals. The X-Y mode is useful for viewing phase difference (Lissajous patterns) or component characteristics. X–Y Connection CH2 CH1 Sin CH1/CH2 Scale Sin 500us/div, 50mV/div 1. Two sine waves appear in different phase. 2. Press the HoriMenu key → F5 (XY) to select the X-Y mode. You can see the phase relationship: CH1 horizontal, CH2 vertical.
GDS-2000 Series Training Manual GLA-1000 ADVANCED Using the demo board, you can verify the advanced bus analysis feature in GLA series. By using GDS-2000 and GLA series together, you can also observe how to trigger on ripple counter.
GLA-1000 ADVANCED GLA-1000 Overview GLA-1000 series are PC-based portable, generic purpose digital logic analyzer aimed at product design and educational field.
GDS-2000 Series Training Manual GLA-1000 Demonstration Setup Follow the below steps to properly power up and connect the demo board. This section assumes you already have GLA-1000 application software, together with GLA driver, installed in your PC. 1. Connect GLA to the PC, press the power switch to power it up. The POWER LED on GLA turns on. 2. The demo board can be connected to GDS-2000 rear panel USB connector, or to the PC. 3. Connect GLA and demo board as in the following diagram.
GLA-1000 ADVANCED 4. Open the GLA application software. 5. Set the memory size to 128k. 6. Group B0 ~ B7 into a bus by highlighting B0 ~ B7 and pressing Ctrl key + G, or calling right-click context menu. 7. Click the start icon or press F5 and capture the signal once. 8. Enter 50us in the display range and observe the data. Make sure “Bus1” shows the accumulating sum of B0 ~ B7. 9. Continue with each demonstration.
GDS-2000 Series Training Manual DAC Simulation This demonstration requires GDS-2000. Background Using GLA-1000 and GDS-2000 together, you can simulate and observe digital-to-analog conversion (DAC). GLA-1000 generates a series of ripple counter signals, while GDS-2000 shows their analog representation.
GLA-1000 ADVANCED 3. Click the Decimal radio button, enter a number between 0 and 254 in Value corner, and press OK. → → (Decimal 50 selected) 4. Click the Repetitive Run icon or press F6 to acquire data continuously. GLA constantly triggers and the B0-B7 bus shows the setup value (0x32, decimal 50, in the below figure). 5. (On GDS-2000) Press the Save/Recall key → F1 to reset the system. Save/Recall Default Setup F 1 6. Press the CH2 key to activate CH2. CH2 CH2 7.
GDS-2000 Series Training Manual POSITION 9. Set the scales as follows. Horizontal: 10ms Vertical: CH1 200mV/div, CH2 200mV/div 10. Press the Acquire key → F5 (Mem Leng) and select long memory. Acquire Mem Leng 12500 F 5 11. Press the trigger MENU key → F2 (Source) and select CH2. Press F3 (Mode) and select Normal mode. (If the waveform does not appear, increase the Trigger level) MENU Source CH2 F 2 Mode Auto F 3 Mode Normal F 3 12.
GLA-1000 ADVANCED I2C Bus Analysis Background This function analyzes the I2C (Inter-Integrated Circuit) bus protocol by extracting the attributes from the captured data. LA 0 LA 1 SDA SCL Tx Rx LA 2 SS SCK MOSI LA 3 LA 5 MISO LA 4 LA 6 Gnd LA 7 T_0 Gnd Connection 1. Click the start icon or press F5 to capture the signal. 2. Click the I2C analysis icon. The setup dialog window appears. 3. Select A0 as SDA and A1 as SCL, click Start, then click OK. → → 4.
GDS-2000 Series Training Manual SPI Bus Analysis Background This function analyzes the SPI (Serial Peripheral Interface) bus protocol by extracting the attributes from the captured data. SCK Tx Rx SDA SCL LA 3 SS LA 0 LA 4 MOSI LA 1 LA 5 MISO LA 2 LA 6 Gnd LA 7 T_0 Gnd Connection 1. Click the start icon or press F5 to capture the signal. 2. Click the SPI analysis icon. The setup dialog window appears. 3. Select A4 ~ A7 as SCK ~ MISO, click Start, then click OK.
GLA-1000 ADVANCED UART Analysis Background This function analyzes the UART (Universal Asynchronous Receiver/Transmitter) protocol by extracting the attributes from the captured data. SCK Tx Rx SDA SCL LA 3 SS LA 0 LA 4 MOSI LA 1 LA 5 MISO LA 2 LA 6 Gnd LA 7 T_0 Gnd Connection 1. Click the start icon or press F5 to capture the signal. 2. Click the UART analysis icon. The setup dialog window appears. 3. Select A0 as Tx and A1 as Rx, click Start, then click OK. (Channel setup) → → 4.
GDS-2000 Series Training Manual APPENDIX Sine Wave Frequency Adjustment The following shows how to adjust the frequency of the pure sine wave generated on the board. 1. Connect the probe to the sine wave output for viewing. The frequency is adjusted by the knob below the USB connector. The three LED above the knob shows the frequency adjustment unit. CH1 100KHz 1KHz 10Hz FM Sin Knob 2. To adjust the frequency, first press the knob down to select the frequency adjustment unit.
APPENDIX Demo Board Signal List The following shows the lists of waveforms generated by the demo board.
GDS-2000 Series Training Manual Signals for logic analyzers Signal name Icon IIC SDA SCL IIC Tx Rx UART UART SPI Description MOSI I/O: Output Type: UART bus I/O: Output Type: SPI bus SCK SS Type: I2C bus I/O: Output SPI MISO LA_0 ~ LA_7 T_0 LA 0 ~ LA 7 Type: Counter signal T_0 Type: Trigger signal I/O: Output I/O: Input Gnd 46 Gnd Type: Ground connector
