UNI-T Spectrum & Signal Analyzers — Buyer's Guide
About This Collection
UNI-T's spectrum and signal analyzer catalog covers 11 active models across four chassis platforms, from 1.5 GHz benchtop entry-class up to 26.5 GHz signal analyzers. The lineup spans three workloads: classic swept-tuned spectrum analysis, full real-time signal analysis with 100% probability of intercept, and dedicated signal-analyzer chassis for modulation and protocol work.
If you need to generate RF signals as well as analyze them, see the RF Signal Generators. For accessories and software options, see Spectrum Analyzer Accessories.
What Every UNI-T Spectrum Analyzer Shares
Frequency floor
9 kHz on every model — HF and IF work covered without a low-band accessory
DANL
Displayed Average Noise Level down to −165 dBm (preamp on, narrow RBW)
Sweep modes
Swept-tuned, FFT, zero-span; trace math, max/min hold, averaging
Detectors
Peak, negative peak, sample, normal, RMS, quasi-peak (chassis-dependent)
Markers
Up to 12 markers with delta, peak search, frequency counter, noise marker
Display
10.1″ capacitive touch standard on Plus, A-series, and 7000A; 8″ on UTS5000A
Connectivity
LAN, USB-Host, USB-Device standard; optional GPIB; web-control on flagship
Warranty
5 years (3 standard + 2 free with registration)
Decision 1: Pick Your Workload
Spectrum Analyzer
Swept-tuned + FFT
Best for: EMC pre-compliance, harmonic distortion, spurious emissions, antenna characterization, filter design, basic signal hunting. Classic swept-tuned operation with FFT mode for slow signals. Tracking generator option on most models for scalar transmission measurements.
Real-Time Signal Analyzer
100% POI, RTSA
Best for: intermittent signals, frequency-hopping radios, EMI debug where the offender comes and goes, pulse capture, persistence display for revealing rare events. The UTS7000A series ships with RTSA built in, with bandwidth options up to 255 MHz.
Signal Analyzer (modulation focus)
Demod, protocol decode
Best for: wireless protocol verification, modulation analysis (AM/FM/PM/VSA), EVM measurement, 5G NR demodulation (UTS7000A with NR option). The A-series (UTS3000A, UTS5000A) and UTS7000A platforms cover modulation-analysis workflows with optional software function kits.
Decision 2: Pick Your Frequency Ceiling
Match the analyzer's ceiling to the highest harmonic, spur, or signal of interest you need to see — not just the fundamental. For EMC pre-compliance, the rule is to cover at least the 10th harmonic of your highest clock.
| Tier |
Frequency |
Platforms |
Best for |
| Entry |
1.5 – 3.2 GHz |
UTS3000T+ entry pair |
Education, basic spectrum work, harmonic distortion to 1 GHz, EMC pre-screen |
| Mid |
3.6 – 8.4 GHz |
UTS3000T+ upper pair, UTS3000A
|
Wireless comms (Wi-Fi, Bluetooth, sub-6 5G), microwave subsystem test, EMC pre-compliance |
| Wide |
13 / 26 GHz |
UTS5000A |
Microwave, satellite Ku-band, broadcast distribution, signal-analysis-focused workflows |
| Flagship + RTSA |
1.3 / 2.6 / 3.2 / 4 GHz |
UTS7000A |
Real-time analysis, 5G NR demodulation, pulse capture, frequency-hopping, EMI debug |
Series at a Glance
1.5 – 8.4 GHz
Two distinct instrument classes under one series name: the entry pair (3015T+/3032T+) at 10,001 sweep points with 4 traces and AM/FM demod; the high pair (3036T+/3084T+) at 40,001 sweep points with 6 traces and AM/FM/PM demod. Tracking generator factory-installed on the 8.4 GHz model.
3.6 / 6 / 8.4 GHz
Signal-analyzer-class chassis with deeper modulation and protocol analysis than the Plus series. Software options for advanced measurement kits, EMI pre-compliance, and signal monitoring. Tracking generator and demodulation kits available.
13 / 26.5 GHz
Microwave signal analyzer for broadcast, satellite, radar IF, and high-frequency wireless work. Removable dust filter for serviceable operation in shop and field environments. Modulation analysis and EMI option support.
1.3 / 2.6 / 3.2 / 4 GHz
Real-time spectrum analysis built in at the chassis level. 100% probability of intercept down to <3.21 µs. Available in Wide-Band (40 MHz baseline, expandable to 255 MHz) and Narrow-Band (-NB, 20 MHz fixed) configurations. Full measurement option ecosystem: NR demod, VSA, I/Q, EMI, PNM, AMA, LTE FDD/TDD.
Recommended Configurations
R&D Lab · General Spectrum Work
Choose: UTS3036T+ or UTS3084T+
40,001 sweep points and 6 traces handle the most common R&D workloads. 3.6 GHz covers Wi-Fi/Bluetooth + sub-6 cellular; 8.4 GHz reaches X-band IF and microwave subsystem work. Tracking generator factory-included on the 8.4 GHz model.
EMC Pre-Compliance Bench
Choose: UTS3036A or UTS3060A
A-series with optional EMI measurement kit gives you CISPR-compliant detectors and band scanning. 3.6 / 6 GHz covers conducted and most radiated emission requirements through the 10th harmonic of mid-frequency clocks.
5G NR Modulation Analysis
Choose: UTS7000A + NR option
Real-time spectrum analysis plus optional 5G NR demodulation. Choose 1.3 / 2.6 / 3.2 / 4 GHz chassis based on which sub-6 NR bands you cover. -NB variant available if your work doesn't need the wide RTSA bandwidth.
Microwave / Satellite Lab
Choose: UTS5026A
26.5 GHz covers full Ku-band satellite uplink, X-band radar fundamentals plus harmonics, and 5G FR2 lower bands. Signal-analyzer-class chassis with modulation analysis option support.
Why Choose UNI-T Spectrum Analyzers?
9 kHz to 26.5 GHz under one platform family
One vendor, one SCPI command set, one accessory ecosystem across the full frequency range. EMC IF stages and satellite Ku-band work the same way on the bench.
Real-time built into the flagship
UTS7000A ships with RTSA in the base configuration. No paid software unlock to see intermittent signals or pulse capture — the persistence display is on the box from day one.
Modulation kits available across the line
VSA, AM/FM/PM demod, EMI pre-compliance, NR demodulation, and protocol analysis options span the A-series and 7000A. Buy the chassis your frequency needs, add the modulation tools your workflow needs.
5-year warranty
Three years standard plus two free with registration on every benchtop analyzer. Longer than the 2-year and 3-year warranties typical at this price tier.
FAQ
How do I pick between the Plus entry pair and the Plus high pair?
The UTS3015T+ and UTS3032T+ (1.5 and 3.2 GHz) use a 10,001-sweep-point engine with 4 traces and AM/FM demod. The UTS3036T+ and UTS3084T+ (3.6 and 8.4 GHz) use a 40,001-sweep-point engine with 6 traces and AM/FM/PM demod. The split is real engineered tiers, not just frequency, so pick the high pair if you need the deeper sweep resolution, more traces for comparison work, or PM demodulation — even if 3.2 GHz would cover your frequency range.
Should I buy a Plus or a UTS3000A in the same frequency band?
If your work is primarily spectrum analysis (looking at what's in the band, harmonic distortion, EMC), the Plus series gives you everything you need at a lower price point. The UTS3000A signal-analyzer class adds deeper modulation analysis, optional EMI measurement kits, and a wider software option ecosystem. Pick the A-series when modulation analysis or pre-compliance EMI is core to your workflow, the Plus series when classic spectrum work dominates.
What does "real-time" actually buy me on the UTS7000A?
A classic swept-tuned analyzer dwells on each frequency point in sequence; if a signal turns on and off faster than the sweep returns to that point, you can miss it entirely. The UTS7000A real-time engine captures 100% of the frequency-domain content in a measurement bandwidth window continuously, with a persistence display that lights up rare events the way an analog oscilloscope's phosphor used to. For intermittent EMI, frequency-hopping radios, pulse signals, and any signal that doesn't stay on long enough to find with sweep, RTSA is the difference between seeing the signal and not.
Tracking generator: which models include it?
The UTS3084T+ Plus ships with a factory-installed tracking generator covering 100 kHz to 6 GHz (note the TG tops at 6 GHz while the analyzer measures to 8.4 GHz — scalar transmission measurements above 6 GHz require an external source). The UTS3036A and UTS3060A support a TG upgrade via the UTS3000-TG option. The UTS3084A chassis is not provisioned for field TG upgrade. The UTS7000A series uses external sources for transmission measurements. Check the individual collection page for current TG availability and pricing.
What's the difference between the UTS7000A and UTS7000A-NB variants?
Same chassis, same frequency range, same option ecosystem. The difference is real-time analysis bandwidth: the standard (Wide-Band) configuration ships with 40 MHz baseline RTSA bandwidth and is expandable via B85/B160/B255 options up to 255 MHz. The -NB (Narrow-Band) configuration ships with a fixed 20 MHz RTSA bandwidth and is not field-expandable. If your work fits inside 20 MHz of analysis bandwidth and you don't need expansion headroom, -NB is the lower-cost choice. If you need wider RTSA today or want the expansion path open, choose the standard Wide-Band configuration.
What probes and accessories do I need?
RF measurement uses N-type or 3.5 mm cables and adapters depending on the chassis, plus optional preamplifiers for low-level signal work (UTS7000A-P40 for the 4 GHz flagship). For EMC pre-compliance, antennas, LISNs, and near-field probes are sold separately. See Spectrum Analyzer Accessories for the full inventory.
What's in the 5-year warranty?
Parts, labor, and return shipping for 3 years standard plus 2 additional years when you register the instrument within 90 days of purchase. Calibration is a separate service.
