UTG4164X 160 MHz 4Ch Performance-Series Arbitrary Waveform Generator
The UNI-T UTG4164X is a four-channel arbitrary waveform generator with a maximum sine output of 160 MHz, built around a 16-bit DAC and a 2.5 GSa/s sample rate (2× interpolation). All four channels deliver equal performance with full 20 Vpp output (high-Z), and an 8 pts to 128 Mpts per-channel arbitrary memory supports long-form custom stimulus. A 10.1-inch capacitive touch display replaces menu-driven navigation with direct parameter manipulation.
80 MHz square / pulse output, 1 µHz frequency resolution across the full 160 MHz range, harmonic distortion below 0.07% (DC to 20 kHz), and an 800 MHz hardware frequency counter. Fifteen analog and digital modulation types — including 3FSK, 4FSK, QAM, and the full BPSK / QPSK / OSK set. Linear, logarithmic, list, and step sweep. Three burst modes (N-cycle, gate, infinite). Advanced Multi-Pulse, Multi-Tone, Sequence, Pattern, I/Q, and Expression functions. Over 200 built-in arbitrary waveforms with SPI / I²C / UART digital-protocol output.
Three four-channel models share one chassis, the same 2.5 GSa/s sample rate, 16-bit DAC, 128 Mpts per-channel memory, full 15-type modulation set, every advanced function, and the same interface and display. They differ in one axis only: maximum output frequency.
| UTG4104X | 100 MHz sine / 50 MHz square & pulse — the choice for general embedded, instrumentation, and teaching-lab work within a 100 MHz envelope. |
| UTG4164X | 160 MHz sine / 80 MHz square & pulse — added headroom for higher-frequency stimulus and wider modulation carriers. |
| UTG4254X | 250 MHz sine / 100 MHz square & pulse — the widest output envelope in the series for the most demanding signal-frequency requirements. |
This page describes the UTG4164X. Channel architecture, modulation, advanced functions, interfaces, and protection below apply to all three models; the Specifications table lists this model's frequency figures.
Four independent channels, every one delivering identical performance — there is no reduced second-bank or derated upper channels. Each channel produces the full output envelope to 20 Vpp (high-Z), and channels can be configured independently or combined: CH2 can mirror CH1, or CH1 = CH1 + CH2 + CH3 + CH4. Four matched channels drive clock, data, trigger, and stimulus simultaneously from a single instrument.
Channels can be freely coupled with configurable frequency, amplitude, and phase relationships (coupling ratio 0.0001 to 10,000), so a parameter change on one channel propagates to its coupled partners by a defined ratio and offset. Outputs can also be merged into arbitrary combinations, producing summed, differential, and composite signals from a single instrument without external combiners.
Digital sampling produces sine, square, ramp, pulse, arbitrary, harmonic, noise, DC, and PRBS waveforms with low distortion and low jitter. Total harmonic distortion is below 0.07% from DC to 20 kHz, with a spurious-free dynamic range to −80 dBc. A small signal superimposed on a large DC offset retains a high signal-to-noise ratio, which matters when the stimulus must be quieter than the device under test.
The pulse generator offers high-precision adjustable edge times with increments as fine as 100 ps and a minimum pulse width of 2.4 ns (Typ.), generating high harmonic content comparable to a dedicated pulse generator. Edge time can be set independently for each pulse, down to a minimum of 2 ns. Square and pulse jitter stays low across the operating range.
Fifteen analog and digital modulation schemes are built in: AM, FM, PM, DSB-AM, ASK, FSK, PSK, 3FSK, 4FSK, BPSK, QPSK, OSK, SUM, QAM, and PWM. QAM supports constellations from QAM4 to QAM256. Each channel supports independent or simultaneous internal/external modulation and internal/external/manual triggering, alongside Linear/Logarithmic/List/Step frequency sweep and N-cycle/gate/infinite burst.
Multi-Pulse produces pulse trains of 2 to 30 pulses with independently adjustable edge times and pulse widths for rapid, precise multi-pulse testing without custom code. Multi-Tone synthesizes 2 to 8 simultaneous frequency components across the full output range, reproducing real-world multi-frequency signals for nonlinear-distortion analysis, wideband frequency-response work, and communication-system verification.
Sequence chains up to 1,024 waveforms totalling 128 Mpts with continuous, cyclic, and gated modes for one-time loading of multiple test cases. Pattern outputs customizable code (NRZ/RZ/Manchester) at multiple logic standards. I/Q generation with the SignalStudio PC software delivers high-EVM baseband output at any symbol rate. Expression builds complex waveforms directly from mathematical formulas.
The integrated arbitrary-waveform editor supports manual drawing, line drawing, and expression-based generation with real-time playback, and also runs on a PC over USB or LAN. Point-by-point output spans 8 pts to 128 Mpts with 16-bit vertical resolution. A high-precision hardware frequency counter measures 100 mHz to 800 MHz with 8-digit resolution and selectable AC / DC / high-frequency-reject coupling.
The Performance-Series envelope — four equal-performance channels, 2.5 GSa/s, 128 Mpts per channel, THD < 0.07%, 15-type modulation, the full advanced-function set, and a capacitive touch UI — targets benchtop work that needs genuine multi-channel stimulus, deep arbitrary support, or wide modulation coverage.
The UTG4000X Performance-Series consists of three four-channel SKUs sharing the same chassis, sample rate, DAC, modulation set, advanced functions, and arbitrary-waveform memory depth:
What does “2.5 GSa/s with 2× interpolation” mean in practice?
The DAC runs at a native rate, and a digital interpolation filter inserts estimated samples to produce a 2.5 GSa/s effective output stream. The reconstruction filter then sees a higher-rate stream and passes more high-frequency signal content with less alias distortion, giving finer detail in the upper portion of the output range.
What is the difference between the UTG4164X and the other UTG4000X models?
All three UTG4000X models are the same four-channel instrument with the same sample rate, DAC, memory, modulation set, advanced functions, interfaces, and chassis. They differ only in maximum output frequency: 100 MHz (UTG4104X), 160 MHz (UTG4164X), and 250 MHz (UTG4254X) sine, with correspondingly scaled square/pulse and modulation ranges. Choose by the highest output frequency your work requires.
Do all four channels run at full performance simultaneously?
Yes. The four channels are equal-performance — each delivers the full output envelope to 20 Vpp (high-Z) independently, with no derating when multiple channels are active. Channels can also be coupled by frequency/amplitude/phase ratio or merged into composite outputs.
What modulation, sweep, and burst envelope does the UTG4000X cover?
Modulation: 15 types — AM, FM, PM, DSB-AM, ASK, FSK, PSK, 3FSK, 4FSK, BPSK, QPSK, OSK, SUM, QAM, PWM, with QAM4 through QAM256 constellations. Sweep: Linear, Logarithmic, List, Step with internal/external/manual triggers. Burst: N-cycle (1 to 1,000,000 cycles), gate, and infinite.
What advanced waveform functions are included?
Multi-Pulse (2 to 30 pulses, per-pulse edge/width), Multi-Tone (2 to 8 components), Sequence (up to 1,024 waveforms, 128 Mpts total), Pattern (NRZ/RZ/Manchester at multiple logic standards), I/Q (SignalStudio baseband), and Expression (formula-defined waveforms) are all standard.
Four independent equal-performance channels, 20 Vpp on every channel
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Channel coupling and merging — ratio-linked parameters and combined outputs
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Low-distortion continuous-wave output with high SNR on large DC offsets
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Wide-dynamic pulse output with fine, independently adjustable edge times
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Fifteen modulation types — analog and digital — with sweep and burst
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Multi-Pulse and Multi-Tone generation for complex timing and spectral test
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Advanced functions: Sequence, Pattern, I/Q, and Expression-based waveforms
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Built-in arbitrary-waveform editor and 100 mHz–800 MHz hardware counter
| Max sine frequency | 160 MHz |
| Max square / pulse frequency | 80 MHz |
| Frequency resolution | 1 µHz |
| Channels | 4, independent and equal-performance |
| Sample rate | 2.5 GSa/s (2× interpolation) |
| Vertical resolution | 16-bit (including sign) |
| Arbitrary waveform length | 8 pts to 128 Mpts/CH (expandable to 256 Mpts/CH with PC software) |
| Built-in arbitrary waveforms | Over 200, non-volatile |
| Arbitrary file storage | 16 GB internal for arbitrary-waveform files (.bsv/.csv) |
| Standard waveforms | Sine, Square, Ramp, Pulse, Harmonic, Noise, PRBS, DC, Arbitrary |
| Modulation types | 15 — AM, FM, PM, DSB-AM, ASK, FSK, PSK, 3FSK, 4FSK, BPSK, QPSK, OSK, SUM, QAM, PWM |
| FM frequency offset | 0 μHz to 80 MHz |
| Harmonic range | 1 μHz to 80 MHz |
| Multi-tone frequency range | 1 kHz to 160 MHz |
| I/Q center frequency | 0 Hz to 160 MHz |
| Sweep modes | Linear, Logarithmic, List, Step |
| Burst modes | N-cycle, Gate, Infinite |
| Advanced functions | Multi-Pulse, Multi-Tone, Sequence, Pattern, I/Q, Expression |
| Digital-protocol output | SPI, I²C, UART |
| Frequency counter | 100 mHz to 800 MHz hardware frequency counter, AC / DC / HF-reject coupling, 8-digit |
| Output amplitude (50 Ω) | 1 mVpp to 10 Vpp (50 Ω, ≤ 40 MHz band) |
| Output amplitude (high-Z) | 2 mVpp to 20 Vpp (high-Z, ≤ 40 MHz band) |
| Output impedance | 50 Ω (Typ.) |
| Total harmonic distortion | < 0.07% (0 dBm, DC to 20 kHz) |
| Phase noise | ≤ −130 dBc/Hz @ 10 kHz offset (Typ.) |
| Pulse/arb jitter | 150 ps (1 Vpp, 50 Ω) |
| Rise/fall time | < 2 ns (Typ., square/pulse) |
| Minimum pulse width | 2.4 ns (Typ.) |
| PRBS | PN3 to PN33, 1 µbps to 300 Mbps |
| Amplitude flatness | ≤ 10 MHz ±0.1 dB; ≤ 60 MHz ±0.2 dB; ≤ 80 MHz ±0.4 dB (Typ.) |
| Display | 10.1-inch capacitive touch, 1280 × 800 |
| Interface | USB Host, USB Device, LAN, HDMI; 10 MHz reference in/out; external trigger in/out; external modulation input |
| Protection | Short-circuit protection; overload auto-disables waveform output |
| Power supply | 100–240 VACrms (±10%), 50/60 Hz; < 50 W |
| Operating temperature | +10°C to +40°C |
| Storage temperature | −20°C to +60°C |
| Dimensions | 361 mm × 209 mm × 106 mm (W × H × D) |
| Weight | 4.5 kg |
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