Tektronix TDS3000 series digital fluorescence oscilloscope

1. Waveform analysis and measurement

(1) Wave Inspector function

Core function: Quickly navigate long recorded waveforms (such as 1M points), avoiding the tedious operation of traditional knobs;

Operation control:

Zoom knob: The inner ring enlarges clockwise and shrinks counterclockwise, supporting separate scaling of X/Y axes;

Translation knob: Move the outer ring left and right to locate the target area;

Marking function: Set the markers (A/B/C/D) according to the markers, and display the time/amplitude difference between the markers;

Example: When analyzing the waveform of a 1M point serial bus, locate a specific data frame by scaling, pan to view the related waveforms before and after, and mark the measurement frame interval.

(2) Measurement function

Automatic measurement: Supports 29 types, with a maximum of 4 displayed at once. The commonly used types are shown in the table below:

Measurement type definition accuracy range

The frequency is calculated based on the first cycle, with units of Hz kHz MHz ± (0.01%+1 count)

Absolute difference between peak to peak maximum and minimum peak values ± (1%+2mV)

The time for the waveform to rise from 10% amplitude to 90% amplitude ± (3%+10ps)

The phase difference between the rising edges of two channel signals, in units of ± (2 °+0.1 °)

Operation steps: Press Measure → "Select Measurement" → Select Source and Type → View Real time Updated Readings;

Statistical analysis: Press "Statistics" to display the average, maximum, minimum, and standard deviation of the measured values (based on 50-1000 sampling points).

(3) FFT frequency domain analysis

Function definition: Convert time-domain (YT) signals into frequency-domain spectra, supporting 1024-1M FFT points;

Window function selection:

Window function characteristics applicable scenarios

Hanning has good frequency resolution and average amplitude accuracy. Analysis of frequency components of periodic signals

Flattop has high amplitude accuracy (± 0.1%), and its frequency resolution is generally calibrated for amplitude calibration (such as signal source output)

Rectangular without attenuation, severe spectral leakage of pulse/instantaneous signals (such as lightning waves)

Operation steps: Press Math → "FFT" → Select signal source → Set window function → Adjust frequency domain scale (Hz/grid).

2. Serial bus triggering and decoding

Supports bus types: I2C, SPI, UART (RS-232/422/485), CAN, LIN;

Trigger settings (using I2C as an example):

Press Trigger Menu ->"Type" select "Bus" ->"Bus Type" select "I2C";

Define SCLK (such as CH1), SDA (such as CH2), and set a threshold (midpoint of the waveform);

Set triggering conditions (such as address=0x50, direction=write), capture the target frame as Single;

Decoding display: Press Decode → "Enable" to overlay color labels on the time-domain waveform (address yellow, data blue, stop red); Support viewing of "event table" (displaying timestamps, types, and values), which can be exported as CSV.

3. Extreme testing and sequence acquisition

(1) Extreme testing

Function definition: Customize "templates" (such as standard waveform contours), use an oscilloscope to compare the collected waveform with the template in real-time, and mark areas that exceed the tolerance;

Application scenario: Batch production testing (such as whether the power output waveform meets the standard);

Operation steps: ① Collect standard waveforms, ② Press Limit Test → "Create Template" → Adjust tolerance (such as ± 5%), ③ Turn on "Test", display "FAIL" and mark the red area when exceeding the tolerance.

(2) Sequence collection

Function definition: Divide long signals into multiple segments (up to 100 segments) for acquisition, with each segment recording a length that is independently set (such as 10k points/segment);

Advantages: Save memory and capture intermittent burst signals (such as pulses with a 1-second interval and a duration of 10 μ s);

Operation steps: Press Acquire → "Sequence" → Set the number of segments and each segment length → Enable acquisition, and after completion, you can view the waveform segment by segment.

Data management and peripheral connectivity

1. Data storage

storage medium

Built in memory: supports 10k-1M point waveform storage, can save 50 sets of settings (. SET files);

USB flash memory: Supports ≤ 32GB, saving formats include:

Image: BMP/JPG (resolution 800 × 600);

Waveform: CSV (including time and amplitude data), TXT (Tektronix proprietary format);

Settings: SET (can directly call up applications);

Save steps: Press Save/Recall → "Save" → Select type/medium/path → Press "Confirm".

2. Peripheral connection

GPIB: Connect to PC through GPIB interface (optional module required) and use TekVISA software to achieve remote control (such as automatic testing scripts);

Ethernet: Supports LXI-C standard, connects to LAN through Ethernet cable, and accesses oscilloscope IP address through browser to achieve remote operation and data transmission;

Printer: Connect to a PictBridge compatible printer, print screen images directly by pressing Print, and support ink saving mode (white background);