When you are choosing between two digital oscilloscopes, the deciding factor is usually whether you need maximum measurement reach or the flexibility of a portable all-in-one tool. That is exactly the trade-off between the Tektronix TDS 380 and the HoldPeak Digital 3in1 in the oscilloscopes signal spectrum analyzers category.
Quick verdict
The Tektronix TDS 380 is the instrument for deep bench work, while the HoldPeak Digital 3in1 is the tool to carry along. The Tektronix costs USD 195.00, the HoldPeak USD 79.99, so the price difference is roughly USD 115. If your signals are fast and your workspace is stationary, the Tektronix wins. If you need a portable unit that can do more than just show waveforms, the HoldPeak wins.
At a glance
| Feature | Tektronix TDS 380 | HoldPeak Digital 3in1 |
|---|---|---|
| Price | USD 195.00 | USD 79.99 |
| Bandwidth | 400 MHz | 50 MHz |
| Condition | Used | New |
| Form factor | Benchtop with CRT display | Handheld with IPS screen |
| Key features | Autoset, measure menu, math functions, RS-232/GPIB/video out | Built-in multimeter and signal generator |
Where the Tektronix TDS 380 wins
The TDS 380 is built for detailed waveform analysis. It gives you two channels, so you can compare signals side by side, and its real-time sampling rate of 2 GS/s captures fast one-shot events with good resolution. If your work involves high-speed timing or embedded debugging, this is the instrument that can keep up.
Where the HoldPeak Digital 3in1 wins
The HoldPeak is about going where the Tektronix cannot. It is compact and built to travel, so it can ride in a tool bag. For a lot of audio, sensor, and controller work, this is enough capability, and the all-in-one design means you do not need to carry separate instruments.
Product notes
Tektronix TDS 380 (Used)
This Tektronix model is a two-channel digital real-time oscilloscope with a maximum bandwidth of 400 MHz and a 2 GS/s real-time sampling rate. It includes autoset, automatic measurements, cursor tracking, and math functions, and the back panel has RS-232, GPIB, video output, and a parallel port. The CRT display is bright but bulky, and the used condition means this is a bench fixture rather than a travel tool. For a fixed station and high-speed signal work, it gives you the performance depth you need.
HoldPeak Digital 3in1 (New)
The HoldPeak is a new handheld that combines multiple tools in one. The oscilloscope side offers 50 MHz of bandwidth, which covers basic frequency work, and the built-in signal generator produces test waveforms. The multimeter side handles DC voltages up to 1000V, AC voltages up to 750V, resistance, capacitance, frequency, duty cycle, diode test, and continuity. The 3.5-inch IPS screen makes readings easy on the go. The trade-off is the lower bandwidth, so if you regularly probe very fast digital signals, this will not dig as deep as the Tektronix. For portable troubleshooting and general electronics, it is a very capable companion.
Final choice by use case
Go with the Tektronix TDS 380 when your circuits are fast, your work stays in one place, and you want an instrument with the bandwidth and sampling depth to handle serious debugging. Choose the HoldPeak Digital 3in1 when you need a portable, multi-purpose tool for field repairs, quick voltage checks, and basic waveform viewing.
