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GAOTek Logic Analyzer (150 MHz/34 Ch/68 K Memory)


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GAOTek Logic Analyzer (150 MHz/34 Ch/68 K Memory) is designed with advanced multilevel triggering and can be used for testing, analysis, and troubleshooting of digital circuits. It provides maximum Input Signal Bandwidth as 150 MHz, 34 data input channels and 68 K memory depth. The use of advanced large-scale integrated circuits, integrated USB 2.0, CPLD, FPGA, high-frequency digital circuitry, embedded systems, and other advanced technology, make the Logic Analyzer to be portable, and easy-to-use, making it best choice in PC based logic analyzers.The analyzer is very suitable for electronic measurement engineers, college students in scientific research and development and teaching assistants.


  • Up to 34 data input channels.
  • High speed operation
  • It provides 500 MHz Timing-Mode (Internal Clock) and 200 MHz State-Mode (External Clock)
  • Continuously variable pre/post trigger position, Advanced Multi-Level Triggering
  • +6 V to -6 V Adjustable Logic Threshold
  • CAN, I2C, SPI and RS232 Interpreters
  • Built-in 250 MHz Frequency Counter
  • USB 1.1 and 2.0 Compatible

Technical Specifications

Channels 34
Input Impedance 200 K (C = 10 p)
Input Voltage Range -60 V ~ 60 V
Voltage Threshold Range -6 V ~ 6 V
Maximum Sample Rate 500 MHz
Maximum Input Signal Bandwidth 150 MHz
Minimum Time Resolution 2 ns
Sample Depth 2 K Sample
Memory Depth 68 Kbits
Electrostatic Protected Area 15 KV
Interface USB Port
Voltage Range 4.5 V ~ 5.5 V
Maximum Power 3.5 W
Weight About 0.86 lbs (390 g)
Size 5.90 in (D) x 0.98 in (H) x 6.50 in (W)

(150 mm x 25 mm x 165 mm)

Operating System Win XP / 2000 / Win7
Operating Temperature Range 14 °F ~  140 °F (-10 °C ~ 60 °C)
Storage Temperature Range -40 °F ~  140 °F ( -40 °C ~ 60 °C)

Additional Information

Block Diagram:

Installing Hardware:

  1. Connect the A-Type Plug of USB cable to your PC’s USB
  2. Connect the B-Type Plug of USB cable to USB
  3. New hardware is found
  4. New hardware search wizard starts
  5. New hardware search wizard starts to search
  6. New hardware wizard installs software
  7. Finish new hardware search

User Interface

The user interface is simple and fully-featured so that users do not have to spend a lot of time to learn.The user interface provides clock panel, waveform panel, bus panel, measurement panel, trigger panel and plug manager.
Menu Contains options as below:

  • File
  • View
  • Setup
  • Analyzer
  • Help

File Contains:

  • New Project: Create a new project with default settings
  • Load Project: Open an exist project
  • Save Project: Save current project to File
  • Export As CSV File: Export data to file as “CSV”
  • Export As TXT File: Export data to file as “TXT”
  • Export As BMP File: Export data to file as “BMP”
  • Print…: Print the current waveform
  • Exit: Exit

View Contains:

  • Background Color: Modify the background color of
  • Show Grid: Show or hide the grid of waveform
  • Show Trigger: Show or hide the trigger line of waveform
  • Show Mark: Show or hide the mark of waveform
  • Show Measurement: Show or hide the measurement of waveform
  • Zoom In: Enlargement waveform view
  • Zoom Out: Reduction waveform view
  • Zoom All: Show entire waveform view

Setup Option contains:

  • Signal Name Setup: Set the signal
  • Bus Setup: Configure the bus and
  • Trigger Setup: Configure the trigger

Analyzer Option contains:

  • Scroll to First Sample: Causes the waveform view to roll to the first sample position
  • Scroll to Trigger: Causes the waveform view to roll to trigger position.
  • Scroll to Last Sample: Causes the waveform view to roll to the last sample position
  • Scroll to Mark: Causes the waveform view to roll to the mark position
  • New Mark: Create a new Mark
  • New Measurement: Create a new
  • Plug Manager: Configure the plug
  • Auto set: Set the waveform

Help Option contains:


 This section focuses on the following topics:

  • Clock Panel
  • Bus Panel
  • Waveform Panel
  • Measurement Panel
  • Export Data

Clock Panel:


Set the clock and sample rate
Inner Clock: When inner clock is chosen, sampling takes place at a rate specified by the “Sample Rate” combo box.
Ext Clock: When ext clock is chosen, you can select which clock input will be used for sampling.

Trigger Level:
Configure the input trigger level.

Trigger Mode:

Auto: Trigger continuously ignores trigger condition.
Normal: Trigger continuously under the trigger condition.
Single: Trigger under the trigger condition once.
Force Trigger: Trigger immediately once.
Trigger Condition: Popup the trigger setup dialog.

Bus Panel:

Click the menu “Setup”->”Bus Setup…” to open the dialog.
The analyzer has 34 signals, ACK, BCLK, A0 ~A15, B0~B15. You can assign the parts of them to some bus.
The list box contains all of the bus; you can add or delete the bus.
For example: Assign a bus “My Bus” which has 8 signals “ACLK, A0, A1, A2, A3, A4, A5, and A6 “.

  1. Click the button “Add”. Then a new bus is added to the list
  2. Click the pane under the CLKA, A0, A1, A2, A3, A4, A5, and if the pane is filled of red, is means you have add the signal to the bus.
  3. Double-click the name of the bus, which is “NewBus1” in this example. Then popup an edit box, in which you can input the bus name “My Bus”.
  4. Then Click “OK”, the “My bus” has been added to the waveform

Waveform Panel

You can observe the waveform by the waveform panel in the main window. The list contains all of the bus in bus panel in the left part of the waveform panel.

Click the name of the bus with the right mouse button, you can configure the bus.

  1. Display Format: The format of the bus data displayed on the
  2. Display Order: The order of the signals displayed in the
  3. Display Style: You can set the display style of the bus in the waveform, Analog or
  4. Color: You can modify the color of the bus displayed in the waveform.
  5. Show Property: Open the bus setup

Click the waveform with the right mouse button, the waveform help menu popup. You can operate by the menu.

Measurement Panel:

Click the measurement panel with the right mouse button, then the menu popup.

Click the “New” in the popup menu or “Analyzer”->”New Measurement” in the main menu, you will add a new measurement to the list in the measurement panel.

Select the “Measure” combo box. You can modify the types of measurement. There are 4 types for you, such as Interval, rate, transitions and cycles.Click the “Delete”; you can delete the measurement item selected in the list. Click the “Show Property”; you can modify the measurement.Also, you can click the main menu “Analyzer”->”New Mark” to add new mark for measurement.

Export Data

Click the menu “File”; you can export the data to file.

If you select the CSV file, you will export the data as the following


This section focuses on the following topics:

  • Base Trigger Setup
  • Advance Trigger Setup

Base Trigger Setup

  1. Rising edge:
    Select the “Rising edge” in the tree; select the signal in the combo box. Then it will be triggered by a rising edge appeared on the selected signal.
  2. Falling edge:
    Trigger by a falling edge appeared on the selected signal.
  3. Rising or falling edge:
    Trigger by a rising or falling edge appeared on the selected signal.
  4. Data:
    Trigger at the appearance of a specified value on the selected bus.
  5. Data value delay:
    Trigger at x time after the appearance of a specified value
  6. Data and edge:
    Trigger at the appearance of a specified value on the selected bus and rising, falling, or rising or falling edge of the selected signal.

Advanced Trigger Setup:
If the base trigger can’t satisfy you, may be you want the advance trigger. Click the “Advance” in the tree, then you can configure the advance trigger.

There are two trigger conditions: trigger A and trigger B. You can set the trigger mode by clicking the Trigger Mode group box.There are four parts in each condition, Data, Duration, Edge and Relative trigger value.

Plug Manager:

  • Summary
  • Example

Click Menu “Analyzer”-> “Plug Manager”.

The list box contains all of the plugs installed in your computer. You can add them to waveform by checking them.
Select a plug and click the “Edit” button, you can modify the property of the plug.

If you want to analyze the I2C bus, you should go with the steps following.

  1. Click menu “Setup”->“Bus Setup” or , open the bus setup dialog. Then add two buses which only have one signal.
  2. Open the plug manager and the I2C setup dialog. Click menu “Analyzer”->“Plug-in-Manager”, then select I2C and click the “Edit” button.
  1. Click menu “Setup”-> “Trigger Setup” or toolbar , open the bus setup dialog, do these steps:
  1. Select “Normal” in trigger
  1. Figure as follows is displayed.
  2. After completing the four steps, you can see the stable and sensitive I2C signals. If there is measuring instrument line interference, user can adjust the trigger voltage Set initial trigger voltage value for SCL and SDA is 1.5V, try to adjust the value to obtain the stable signal.


Pin Number Wire ID Wire Color Contact Color
1 Ground Black Black
2 ACLK Blue Blue
3 Ground Black Black
4 A0 Black Yellow
5 A1 White Yellow
6 A2 Gray Yellow
7 A3 Blue Yellow
8 A4 Green Yellow
9 A5 Yellow Yellow
10 A6 Orange Yellow
11 A7 Red Yellow
12 A8 Black Yellow
13 A9 White Yellow
14 A10 Gray Yellow
15 A11 Blue Yellow
16 A12 Green Yellow
17 A13 Yellow Yellow
18 A14 Orange Yellow
19 A15 Red Yellow
20 Ground Black Black


Pin Number Wire ID Wire Color Contact Color
1 Ground Black Black
2 BCLK Blue Blue
3 Ground Black Black
4 B0 Black Orange
5 B1 White Orange
6 B2 Gray Orange
7 B3 Blue Orange
8 B4 Green Orange
9 B5 Yellow Orange
10 B6 Orange Orange
11 B7 Red Orange
12 B8 Black Orange
13 B9 White Orange
14 B10 Gray Orange
15 B11 Blue Orange
16 B12 Green Orange
17 B13 Yellow Orange
18 B14 Orange Orange
19 B15 Red Orange
20 Ground Black Black

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