Overview

The UNI-T UTG4104X delivers four independent, equal-performance channels of arbitrary waveform generation up to 100 MHz—with 2.5 GSa/s sampling, 16-bit vertical resolution, and 128 Mpts waveform memory—at a price where competitors offer only two channels. Designed for hardware engineers, university labs, and wireless developers who need professional multi-channel signal generation without premium pricing, the UTG4104X provides 15 modulation types, built-in digital protocol output (SPI, I²C, UART), and advanced functions including multi-pulse, multi-tone, sequence, and IQ signal generation that typically require instruments costing two to three times more.

You need a waveform generator that keeps up with your real-world test scenarios—simulating clock, data, trigger, and stimulus signals simultaneously across four channels. The UTG4104X eliminates the workaround of daisy-chaining two-channel instruments, saves bench space, and gives every channel the same full-performance output. Whether you're validating embedded systems, characterizing filters, testing communication protocols, or equipping a teaching lab, the UTG4104X delivers the channel count, modulation depth, and signal fidelity your applications demand—backed by an exclusive 3+2 year warranty (5 years with registration) and SCPI remote control for automated test integration.

Most waveform generators in this price range give you two channels—and often, the second channel has reduced performance compared to the first. The UTG4104X delivers four fully independent channels, each with identical specifications. Every channel outputs the same 100 MHz sine waves, the same 50 MHz square/pulse signals, the same full suite of 15 modulation types, and the same 20 Vpp maximum amplitude.

Why four channels matter for your workflow: Real-world circuits don't operate on a single signal. You're testing a mixed-signal board that needs a clock on CH1, serial data on CH2, an analog stimulus on CH3, and a trigger reference on CH4—simultaneously. With a two-channel instrument, you're either swapping cables between test runs or buying a second generator (doubling your cost and bench footprint). The UTG4104X handles it in one box.

Channel coupling and merge functions let you combine channels for complex stimulus patterns. Synchronization output maps CH1 sync to CH3 and CH2 sync to CH4, providing precise timing references when you need them. Each channel supports independent or simultaneous internal/external modulation and triggering—so four channels truly means four independent signal sources under your control.

Vertical resolution determines the smallest amplitude step your generator can produce. The UTG4104X's 16-bit DAC provides 65,536 discrete amplitude levels—4× more steps than a 14-bit instrument's 16,384 levels. This translates directly to lower quantization noise, smoother waveform transitions, and more accurate reproduction of complex arbitrary waveforms.

Where you'll notice the difference: When generating low-amplitude signals (millivolt range), 14-bit generators produce visible staircase artifacts. At 16-bit resolution, those steps are 4× smaller, producing cleaner signals that don't introduce measurement artifacts into your DUT. For arbitrary waveforms with fine amplitude detail—captured sensor signals, modulated envelopes, or custom test patterns—the additional resolution preserves waveform fidelity that lower-resolution instruments lose.

Combined with -130 dBc/Hz typical sine wave phase noise at 10 kHz offset, the UTG4104X produces output signals clean enough for demanding analog measurements without the generator itself becoming the noise-limiting factor in your test setup.

The UTG4104X includes a comprehensive modulation engine covering analog modulation (AM, FM, PM, DSB-AM, PWM, SUM), digital keying (ASK, FSK, 3FSK, 4FSK, PSK, BPSK, QPSK, OSK), and quadrature amplitude modulation (QAM). Each channel supports independent modulation—you can run AM on CH1, FSK on CH2, and QPSK on CH3 simultaneously.

What this means in practice: A wireless product engineer testing a Bluetooth module uses FSK modulation to generate stimulus signals. A communications engineer verifying a demodulator needs BPSK and QPSK test patterns. A power supply designer uses PWM to simulate controller outputs. An audio engineer needs AM for broadcast testing. Instead of configuring custom arbitrary waveforms (or buying a dedicated modulation source), you select the modulation type, set the parameters, and start testing. The modulation engine handles the math in real time.

Both internal and external modulation sources are supported on every channel, with internal modulation waveforms selectable from sine, square, ramp, arbitrary, or noise. External modulation accepts signals through the rear-panel modulation input for real-world stimulus scenarios.

The UTG4104X generates configurable multi-pulse trains of 2 to 30 pulses with independently adjustable width, gap, and edge timing for each pulse. Rise and fall times are adjustable down to less than 2 ns. This eliminates the tedious process of constructing complex pulse patterns in arbitrary waveform software—you define the pulse parameters directly on the instrument and output immediately.

Practical applications: Power electronics engineers use multi-pulse to simulate gate drive fault sequences and test protection circuit response times. Digital designers create multi-pulse patterns to validate setup/hold timing on interfaces. Automotive engineers simulate sensor pulse trains with specific timing signatures. Medical device engineers generate stimulus pulse sequences for transducer testing.

The multi-pulse function works alongside burst mode (N-cycle, gate, and infinite) and frequency sweep (linear, logarithmic, list frequency, and stepping), giving you flexible triggering and timing control for virtually any pulse-based test scenario.