TINYSA ULTRA+ ZS407: The Compact Spectrum Analyzer That Redefines Portability & Performance

If you’re an amateur radio operator, electronics hobbyist, or field technician, you know the frustration of choosing between a spectrum analyzer that’s portable and one that’s powerful.  The TINYSA ULTRA+ ZS407 ends that trade-off — packing lab-grade RF performance into a device small enough to slip into your toolbag.  Let’s break down why this model is setting a new standard for compact spectrum analysis.

ZS407 Core Specs:

1. Frequency Range: 100kHz-7.3GHz
   The ZS407 spectrum analyzer adapts to two modes for maximum flexibility:
   Normal Mode: 100kHz to 900MHz (ideal for AM/FM radio, Bluetooth, Zigbee, and most IoT devices).
   ULTRA Mode: Unlocks up to 7.3GHz (perfect for Wi-Fi 6E, 5G sub-6GHz, and high-frequency industrial sensors).
2. Sensitivity: Built-in 20dB Low-Noise Amplifier (LNA)
   Without LNA: At 30MHz (30kHz resolution bandwidth/RBW), it picks up signals as weak as -102dBm (great for troubleshooting strong interference sources).
   With LNA: At 30MHz (200Hz RBW), it dives to -145dBm — enough to trace faint shortwave transmissions or distant wireless sensors in noisy environments.
   The LNA itself boasts a 5dB noise figure (up to 6GHz), ensuring minimal signal degradation when amplifying weak inputs.
   
3. Resolution & Accuracy: Precision You Can Trust
   For calibration, antenna tuning, or interference hunting, precision matters — and the ZS407 delivers:
   Resolution Bandwidth (RBW): Select from 0.2kHz, 1kHz, 3kHz, 10kHz, 30kHz, 100kHz, 300kHz, 600kHz, or 850kHz. This lets you zoom in on narrowband signals (e.g., 0.2kHz for CW ham radio) or scan wide swaths of spectrum quickly.
   Frequency Accuracy: Matches your chosen RBW (no guesswork when pinpointing signal frequencies).
   Power Level Accuracy: ±2dB after calibration (critical for verifying compliance with RF power limits).
   Phase Noise: At 30MHz, it hits -108dB/Hz (100kHz offset) and -115dB/Hz (1MHz offset) — meaning clean, stable measurements even in crowded frequency bands.
4.  Input Handling: Safe & Reliable
   Input Impedance: 50 ohms (when input attenuation is set to 10dB or higher — standard for RF testing).
   Power Limits:
   Absolute max: +6dBm (with 0dB internal attenuation) or +20dBm short-term peak (with 30dB attenuation).
   Recommended: Keep input power below -25dBm for best accuracy; +0dBm max in auto-attenuation mode.
   Intercept Point (IIP3): +15dBm (0dB attenuation) — high enough to avoid distortion when measuring strong adjacent signals.

User-Centric Design: Built for How You Work

1.  Display & Controls: Clear, Intuitive, Durable
   Touch Screen: 4-inch resistive touchscreen with 480×320 resolution and 16-bit RGB color — large enough to view detailed spectrum plots, even in bright outdoor light.
   Dual Control: Use the touchscreen for quick taps/zooms, or the jog switch for precise adjustments.
   No Switching Noise: A linear power supply eliminates interference from switching regulators, keeping measurements clean.
2. All-in-One Functionality: More Than a Spectrum Analyzer
   Built-In Signal Generator: Sine wave output (100kHz–900MHz) with harmonics < -40dB (clean enough for receiver testing).
   Two high-frequency modes:
   Cleanest Signal: Square wave up to 6GHz (coarse frequency steps, low distortion).
   Highest Accuracy: Reduced harmonics up to 7.3GHz (fine frequency steps, ideal for calibration).
   Modulation: Optional AM (50Hz–5kHz, 10–100% depth) or FM (1kHz, 1–300kHz deviation) — great for testing transceivers.
   Reference Generator: Optional square wave output (1/2/4/10/15/30MHz, -35.6dBm) for on-the-spot calibration.
3. Portability & Battery Life
   Size & Weight: Palm-sized (fits in your pocket) and just 200g — lighter than most smartphones.
   Battery: 5000mAh lithium-ion battery with:
   Runtime: At least 8 hours on a full charge (enough for a full day of fieldwork).
   Charging: 1 hour max (using a 500mA+ USB port/charger — no waiting around).
   Connectivity: USB-C for PC control/data logging (works with official TinySA software).

Who Is the ZS407 For?

This tool isn’t just for experts — it’s for anyone who works with RF, from hobbyists to pros:

Amateur Radio Operators: Tune antennas, monitor band conditions, or test transceivers (7.3GHz range covers most ham bands).
Field Technicians: Troubleshoot Wi-Fi/5G interference, test IoT device signal strength, or calibrate sensors.
Electronics Hobbyists: Learn RF theory hands-on or build/debug wireless projects.
Students & Educators: Affordable, portable, and powerful enough to teach real-world RF concepts without

Final Verdict: Your New Go-To RF Tool

The TINYSA ULTRA+ ZS407 proves that “compact” doesn’t have to mean “compromised.” It’s the rare tool that’s equally at home on your workbench (for calibration) and in the field (for interference hunting) — all at a price that won’t break the bank. If you’re tired of choosing between portability and performance, the ZS407 is the solution. It’s not just a spectrum analyzer — it’s a complete RF testing kit in your pocket.

Explore the Product:

AURSINC TinySA Ultra+ ZS407 Spectrum Analyzer

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