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SDRstore.eu • 06/09/2026

TinySA Ultra Setup Guide: Spectrum Scanning, Signal Generator, LNA, and Attenuator

Updated: June 2026. This TinySA Ultra setup guide explains first-use calibration, spectrum scanning, frequency settings, markers, resolution bandwidth, waterfall display, the built-in LNA, internal and external attenuation, signal-generator mode, safe transmitter testing, PC control, and common troubleshooting steps.

TinySA Ultra is one of the most useful portable RF tools for radio enthusiasts, students, engineers, amateur-radio operators, repair technicians, and SDR users.

It can scan radio spectrum, display signal peaks, track intermittent transmissions, show a waterfall, generate low-power test signals, help identify interference, inspect harmonics with the correct protected setup, and support field diagnostics without requiring a large laboratory spectrum analyzer.

However, TinySA Ultra is a measurement instrument rather than a normal radio receiver. It is also more sensitive than many beginners expect. Incorrect input levels, direct transmitter connections, excessive DC voltage, nearby transmitting antennas, and unsuitable amplifier settings can damage the device or produce misleading results.

This guide explains how to set up TinySA Ultra safely, how to run your first scan, when to enable the built-in LNA, when to use attenuation, how the internal signal generator works, and how TinySA Ultra differs from a NanoVNA and an SDR receiver.

SDRstore.eu offers the TinySA Ultra 100 kHz–5.3 GHz Portable Spectrum Analyzer and RF Generator.

Quick Answer: How Do You Set Up TinySA Ultra?

Charge the TinySA Ultra using the supplied USB-C cable.
Confirm that you own a genuine device and review the installed firmware version.
Connect the CAL output to the RF input using a short supplied SMA cable.
Open CONFIG and run SELF TEST.
Keep the SMA cable connected and open CONFIG → LEVEL CAL.
Run CALIBRATE 100kHz to 5.34GHz.
Disconnect the calibration cable before using the signal generator.
Enable Ultra mode from the configuration menu when higher-frequency scanning is required.
Select spectrum-analyzer mode.
Start with a narrow, known frequency range.
Leave attenuation on an automatic or conservative setting until you understand the signal level.
Enable the built-in LNA only for genuinely weak signals.
Use an external attenuator, dummy load, and suitable coupler for transmitter measurements.

The most important safety rule is simple: never connect an unknown RF source or a transmitter output directly to the TinySA Ultra input.

What Is TinySA Ultra?

TinySA Ultra is a compact battery-powered spectrum analyzer with a touchscreen interface, internal signal generator, built-in calibration source, optional internal LNA, internal step attenuator, USB control, and MicroSD storage.

It is designed for practical RF analysis in a portable form factor.

TinySA Ultra can help you:

Scan a selected radio-frequency range
Find the strongest signal in a band
Measure approximate signal levels
Locate interference sources
Inspect harmonics with a safe attenuated setup
Compare antenna positions
Compare filters
Observe intermittent transmissions with max hold
Use a waterfall display
Generate low-power RF test signals
Test receiver tuning
Perform field diagnostics
Control the device from a computer
Save screenshots and traces to a MicroSD card

TinySA Ultra does not replace:

A calibrated professional spectrum analyzer for compliance testing
A vector network analyzer for antenna SWR and impedance measurements
A full laboratory signal generator for clean high-frequency test signals
An oscilloscope
A power meter
A complete SDR receiver for listening and decoding
Safe RF test practices

TinySA Ultra Frequency Range Explained

TinySA Ultra specifications depend on the exact hardware version.

The standard TinySA Ultra ZS405 covers approximately 100 kHz–800 MHz in its normal operating mode. Ultra mode extends practical scanning to approximately 5.3 GHz, with level calibration extending higher.

SDRstore.eu lists the available TinySA Ultra model with analysis coverage from 100 kHz–800 MHz in normal mode and up to 6 GHz with Ultra mode enabled.

Performance becomes more limited near the top of the extended range. Treat Ultra mode as a valuable wideband survey tool rather than assuming identical sensitivity and accuracy at every frequency.

Mode	Typical Frequency Range	Best Use
Normal mode	Approximately 100 kHz–800 MHz on the standard TinySA Ultra	More routine measurements across HF, VHF, and lower UHF
Ultra mode	Extended scanning into the GHz range	Wideband surveys, higher-frequency signal checks, and exploratory measurements
Harmonic mode	Additional extended observation capability depending on model and firmware	Specialist exploration rather than normal calibrated measurements

TinySA Ultra vs TinySA Ultra+ Models

Before following advanced steps, confirm the exact label on your device.

Model	How to Identify It	Normal Input Range	Extended Ultra-Mode Range
TinySA Ultra ZS405	The front label says `Ultra`	Approximately 100 kHz–800 MHz	Approximately 5.3 GHz, with level calibration extending higher
TinySA Ultra+ ZS406	The front label says `Ultra+`; check the rear label	Approximately 100 kHz–900 MHz	Approximately 5.4 GHz
TinySA Ultra+ ZS407	The front label says `Ultra+`; check the rear label	Approximately 100 kHz–900 MHz	Approximately 7.3 GHz

Menu options and limits can vary slightly by firmware and hardware version. This guide focuses primarily on TinySA Ultra ZS405 while explaining the workflow that also applies broadly to newer Ultra+ devices.

What Is Included with TinySA Ultra?

The TinySA Ultra package currently listed on SDRstore.eu includes:

TinySA Ultra host with 4-inch display
Built-in rechargeable battery
USB Type-C data cable
Two short SMA cables
SMA-to-SMA barrel connector
SMA antenna
String and pick
32 GB MicroSD card installed in the device

Keep the SMA cables and barrel connector. They are useful for self-test, calibration, and safe low-power bench experiments.

Safety First: Protect the TinySA Ultra Input

TinySA Ultra is not designed to accept transmitter power directly.

The safest beginner assumption is that every unknown RF source is too strong until proven otherwise.

Never connect the RF input directly to:

A handheld radio transmitter
A mobile radio transmitter
An HF transceiver output
An RF power amplifier
A high-power signal generator
An antenna installed beside an actively transmitting antenna
An unknown cable that may carry DC voltage
An active bias-tee line without checking the DC level

Use protective accessories when measuring transmitters:

Dummy load rated for the transmitter power
External RF attenuator rated for the power level
Directional coupler or sampler where appropriate
DC block when DC voltage may be present
Suitable coaxial cables and adapters
Enough attenuation to keep the analyzer input comfortably below its limit

The official TinySA documentation includes model-specific maximum-input figures. Use a conservative safety margin rather than operating near the published maximum.

Safe transmitter-measurement concept

Transmitter → rated dummy load or suitable coupler → external attenuation → TinySA Ultra RF input

Do not transmit into the TinySA Ultra directly.

Step 1: Charge the TinySA Ultra

Connect the supplied USB-C cable to a 5 V USB charger or a computer USB port.

The charging indicator lights while the battery is charging and turns off after charging is complete.

A full battery is useful before firmware updates, self-test, calibration, and portable field measurements.

Step 2: Confirm Firmware and Device Authenticity

TinySA devices are popular, which also means counterfeit units exist.

Purchase from a trusted source and confirm that the device accepts official firmware updates.

Basic authenticity workflow

Power on the TinySA Ultra.
Open the configuration menu.
Check the firmware version.
Use the official TinySA firmware source if an update is required.
Run the internal self-test after updating.

The firmware already installed on a new device is normally enough to begin using it. Updating is still worthwhile when you want the latest bug fixes and features.

Step 3: Run the TinySA Ultra Self-Test

Self-test checks internal functions before you begin serious measurements.

Self-test procedure

Power off the TinySA Ultra.
Use a short supplied SMA cable to connect the CAL connector to the RF connector.
Power on the TinySA Ultra.
Touch the display to open the menu.
Select CONFIG.
Select SELF TEST.
Wait for the diagnostic process to complete.
Confirm that the displayed tests pass.

Keep the calibration cable connected for the next step.

Step 4: Calibrate the TinySA Ultra

TinySA Ultra includes a built-in calibration source.

Calibration improves power-level measurements and should be completed during the initial setup.

Level-calibration procedure

Keep the short SMA cable connected between CAL and RF.
Touch the display to open the menu.
Select CONFIG.
Select LEVEL CAL.
Select CALIBRATE 100kHz to 5.34GHz.
Wait for the calibration to finish.
Power off the TinySA Ultra after calibration.
Disconnect the SMA cable.
Power the unit on again.
Confirm that the level indicators no longer show an uncalibrated state.

Calibration data is stored in the device. You do not need to repeat this process before every normal measurement.

Important calibration warning

Disconnect the CAL-to-RF cable before enabling higher-power generator output modes. Leaving ports connected after self-test or calibration can damage the analyzer input.

Step 5: Enable Ultra Mode

Ultra mode extends the frequency range beyond the standard normal-mode range.

Enable Ultra mode when:

You need to scan frequencies above approximately 800 MHz on a standard TinySA Ultra.
You are performing a wideband survey.
You are exploring higher-frequency ISM, cellular, GNSS, satellite, or RF-development bands.
You understand that sensitivity and measurement accuracy can degrade near the top of the extended range.

Ultra-mode procedure

Open the main menu.
Select CONFIG.
Select the additional settings menu where required by your firmware version.
Select ENABLE ULTRA.
Return to spectrum-analyzer mode.

You can normally leave Ultra mode enabled for convenience. For careful measurements, remain aware of the limitations at higher frequencies.

Your First Spectrum Scan

Start with an easy and legal signal source, such as local FM broadcast activity.

FM broadcast radio is normally found between approximately 88 MHz and 108 MHz.

First FM broadcast scan

Connect the supplied SMA antenna to the RF input.
Do not place the antenna near an active transmitter.
Open MODE.
Select SPECTRUM ANALYZER.
Open FREQUENCY.
Set START to 88 MHz.
Set STOP to 108 MHz.
Return to the graph.
Wait for the sweep to complete.
Open MARKER.
Enable a marker.
Use PEAK SEARCH.

The marker should move to one of the strongest local FM broadcast signals.

Start and Stop vs Center and Span

TinySA Ultra supports two common ways to define the frequency range.

Frequency Method	How It Works	Best Use
Start and Stop	Defines the lower and upper edges of the displayed spectrum	Scanning a known band such as 88–108 MHz FM broadcast
Center and Span	Defines the middle frequency and total displayed bandwidth	Inspecting a signal closely after locating it

Example: inspect a 100 MHz signal more closely

Set CENTER to 100 MHz.
Set SPAN to 2 MHz.
Use a marker to read the peak frequency and level.
Reduce the span further when you need more detail.

What Is Resolution Bandwidth?

Resolution bandwidth, usually shortened to RBW, controls how finely the TinySA Ultra separates nearby signals.

RBW Setting	Main Advantage	Main Trade-Off
Wider RBW	Faster sweep	Less detail between closely spaced signals and a higher visible noise floor
Narrower RBW	Improved ability to separate nearby signals and reveal weak peaks	Slower sweep

Good beginner approach

Start with automatic RBW.
Use a wider RBW for a broad survey.
Narrow the span around the signal of interest.
Reduce RBW gradually when you need more detail.
Allow additional sweep time after selecting a narrower RBW.

Do not use the narrowest possible RBW automatically. The best setting depends on whether you prioritize speed or detail.

What Is Video Bandwidth?

Video bandwidth, usually shortened to VBW, smooths the displayed trace after detection.

A lower VBW can make a noisy trace easier to interpret, but excessive smoothing can hide short events or make the display respond slowly.

Use VBW when:

The trace is visually noisy.
You are observing a stable carrier.
You want an easier-to-read display.

Avoid excessive smoothing when:

You are looking for brief transmissions.
You want to observe changing signals.
You are diagnosing intermittent interference.

How to Use Markers

Markers allow you to measure a signal peak more precisely.

Useful marker functions

Marker Function	What It Does
Peak Search	Moves the marker to the strongest visible signal
Tracking	Keeps the marker positioned on the strongest peak as signals change
Max Left and Max Right	Moves between nearby signal peaks
Delta Marker	Shows frequency and level differences relative to another marker
Marker to Center	Moves the selected signal to the middle of the screen
Marker to Reference Level	Moves the reference-level display relative to the selected peak

Recommended marker workflow

Scan a broad frequency range.
Select MARKER.
Use PEAK SEARCH.
Move the marker peak to the center frequency.
Reduce the span.
Reduce RBW if more detail is needed.
Use delta markers when comparing signals or harmonics.

How to Use Max Hold

Max hold stores the highest observed level at each frequency across multiple sweeps.

This is useful for intermittent signals that may appear briefly and disappear before you notice them.

Use max hold for:

Intermittent interference
Short radio bursts
Remote-control transmitters
ISM-band devices
Wireless microphone activity
Comparing peak emissions over time
Capturing activity while moving an antenna

Max-hold procedure

Select the desired frequency range.
Open TRACE.
Select a trace.
Select the calculation mode.
Choose MAX HOLD.
Allow several sweeps to complete.
Reset the trace when starting a new measurement.

How to Use Averaging

Averaging smooths repeated scans and makes stable signals easier to inspect.

Use averaging for:

Stable carriers
Noise-floor comparison
Filter comparisons
Repeated low-level signals
Cleaner screenshots

Avoid heavy averaging for:

Short intermittent signals
Burst transmissions
Fast-changing interference
Signals that move rapidly in frequency

How to Use the Waterfall Display

Waterfall mode displays signal activity over time.

Instead of showing only the current sweep, it adds a time history that makes changing and intermittent signals easier to understand.

Waterfall mode is useful for:

Frequency-hopping signals
Intermittent interference
Wireless-control transmissions
Busy ISM bands
Comparing channel activity
Observing signals that appear briefly

Enable waterfall mode

Open the display menu.
Select WATERFALL.
Select it again when you want a larger waterfall view.

Reference Level and Scale per Division

The reference level controls the power level displayed at the top of the graph.

Scale per division controls how much vertical range each grid division represents.

Example

If the reference level is set to -20 dBm and the scale is 10 dB/div, each vertical division represents a 10 dB change.

Adjust reference level when:

Strong signals appear above the visible screen.
Weak signals are compressed near the noise floor.
You add attenuation.
You enable the LNA.
You connect a different antenna.

What Is the TinySA Ultra Internal Attenuator?

TinySA Ultra includes an internal step attenuator.

The attenuator reduces input signal level before it reaches sensitive internal circuitry.

The standard TinySA Ultra supports internal attenuation from 0 dB to 31 dB in 1 dB steps when the internal LNA is not active.

Use more attenuation when:

The displayed signal is strong.
The noise floor rises unexpectedly.
False signals appear across the screen.
You suspect receiver overload.
You are comparing stronger RF sources.
You are using an external antenna in a strong-signal environment.

Use less attenuation when:

The target signal is weak.
You are observing a quiet band.
The visible signal remains near the noise floor.
You are comparing low-level receive signals safely.

Best beginner setting

Start with automatic attenuation. Move to manual attenuation only after you understand the signal level and measurement goal.

What Is an External Attenuator?

An external attenuator is a separate RF accessory installed before the TinySA Ultra input.

RF source → external attenuator → TinySA Ultra RF input

External attenuation is essential when the input signal may exceed the safe level of the analyzer.

Use an external attenuator when:

Testing a transmitter through a suitable dummy load and coupler
Measuring an unknown RF source
Connecting to a signal generator with a potentially high output level
Testing an RF amplifier safely
Working near a strong source
Protecting the TinySA input during bench experiments

External attenuation correction

TinySA Ultra includes an external-gain correction setting.

Enter a positive correction for external amplification or a negative correction for external attenuation. The display can then account for the accessory in the RF path.

Example

If you install a 30 dB external attenuator, set the external correction accordingly so the displayed level reflects the signal before attenuation.

Always verify the correction logic carefully before relying on an absolute measurement.

Internal Attenuator vs External Attenuator

Attenuator Type	Main Purpose	When to Use It
Internal TinySA attenuator	Adjust analyzer input level and improve measurement behavior	Routine signal-level optimization within the safe input range
External RF attenuator	Protect the analyzer before the signal reaches its input	Unknown signals, transmitters, amplifiers, and higher-power bench tests

Internal attenuation does not replace external input protection when the RF source may be too strong.

What Is the TinySA Ultra Built-In LNA?

TinySA Ultra includes an optional internal low-noise amplifier.

The built-in LNA adds approximately 20 dB of gain and is intended for weak-signal measurements.

When the LNA is enabled, the internal attenuator is disabled.

Enable the internal LNA when:

The target signal is weak.
The signal is close to the noise floor.
You are observing a relatively quiet frequency range.
You understand that the RF environment is not overloaded by stronger signals.
You want to compare weak received signals safely.

Do not enable the internal LNA when:

Strong signals are visible.
You are measuring a transmitter path.
You are close to a transmitter.
The waterfall is already crowded.
False signals appear across the spectrum.
You need internal attenuation.
You do not understand the input level.

LNA procedure

Start with the LNA disabled.
Scan the target range.
Confirm that no strong signals dominate the display.
Open LEVEL.
Select LNA.
Compare the target signal and noise floor.
Disable the LNA immediately if false signals or overload symptoms appear.

The LNA is a sensitivity tool, not a default setting.

How to Recognize Overload

Overload occurs when the signal level is too strong for part of the analyzer chain.

Common overload symptoms

Many unexpected signals appear at regular frequency intervals.
The noise floor rises dramatically.
A strong local transmitter appears in several locations.
Enabling the LNA makes the display much worse.
Reducing attenuation makes the trace less believable.
Increasing attenuation removes false signals.
A smaller antenna produces a cleaner result.
Adding an external filter improves the display.

Fix overload by:

Disable the internal LNA.
Increase internal attenuation.
Add external attenuation when necessary.
Reduce the antenna signal level.
Move away from the transmitter.
Use a suitable RF filter.
Narrow the frequency range.
Confirm that the displayed peaks are real.

Read our detailed guide: Do You Need an LNA for SDR? When It Helps and When It Makes Signals Worse.

How to Use TinySA Ultra Signal-Generator Mode

TinySA Ultra includes a low-power signal generator for receiver testing, basic RF experiments, and bench diagnostics.

Signal-generator mode should be treated as a separate mode from normal spectrum analysis.

Basic signal-generator procedure

Disconnect any unsafe RF path.
Open the main menu.
Select MODE.
Select SIGNAL GENERATOR.
Keep the output switched off while configuring the setup.
Connect the output to a suitable receiver, protected RF path, or low-power bench setup.
Select the output frequency.
Select a conservative low output level.
Enable the output only after checking the connections.
Disable the output before changing cables.

TinySA Ultra Signal-Generator Frequency Range

Generator Mode	Typical Range on Standard TinySA Ultra	Important Note
Sine-wave output	Approximately 100 kHz–800 MHz	Cleaner low-frequency generator mode with reduced harmonics
Cleanest high-frequency output	Up to approximately 4.4 GHz	Square-wave output with coarser frequency steps and less accurate output level
Highest-accuracy high-frequency output	Extended higher-frequency range depending on model	Improved level and frequency control but potentially strong spurs

Above approximately 800 MHz, the generated signal is not equivalent to a clean laboratory-grade sine-wave source.

Use high-frequency generator modes for appropriate experiments while remaining aware of harmonics and spurious outputs.

Signal Generator: Cleanest Output vs Highest Accuracy

Output Mode	Main Advantage	Main Limitation	Best Use
Cleanest signal	Reduces unwanted outputs at unrelated frequencies	Square-wave behavior, coarser frequency control, and less accurate output level	Basic receiver testing where spurious responses should be reduced
Highest accuracy	Improved frequency and output-level control	Potentially strong additional spurious signals	Controlled receiver-response experiments where level and frequency positioning matter

Select the mode that matches the test. Do not assume the highest-frequency generator mode is spectrally clean.

How to Test a Receiver with the Signal Generator

TinySA Ultra can help confirm whether a receiver responds near the expected frequency.

Basic receiver test

Switch the TinySA Ultra to signal-generator mode.
Keep output disabled while connecting the cable.
Connect the TinySA output to the receiver input through suitable attenuation if required.
Set a low generator output level.
Set the target frequency.
Enable generator output.
Tune the receiver to the same frequency.
Confirm that the receiver detects the test signal.
Reduce the generator level gradually to test sensitivity.
Disable generator output before disconnecting cables.

Avoid excessive input levels. Receiver inputs can also be damaged by unsuitable signal levels.

How to Use Generator Sweep Mode

Sweep mode changes output frequency or level over time.

Sweep mode can help with:

Receiver response testing
Basic passband exploration
Checking whether a receiver responds across a range
Testing alarms and RF detectors
Educational demonstrations

Configure sweep mode

Open signal-generator mode.
Select SWEEP.
Set the frequency span.
Set level change if needed.
Set sweep time.
Set sweep points where supported.
Confirm the protected test setup.
Select START SWEEP.

Do not use sweep mode blindly around sensitive RF systems or antennas. Use a controlled bench connection.

AM and FM Modulation

TinySA Ultra signal-generator mode supports basic modulation options.

Available modulation directions include:

AM modulation
FM modulation
Selectable AM depth
Selectable FM deviation
Selectable modulation frequency

Use modulation for:

Receiver audio tests
Educational demonstrations
Basic demodulation checks
Comparing receiver behavior

This is a practical test feature rather than a replacement for a professional arbitrary waveform generator.

How to Check Harmonics Safely

TinySA Ultra can help observe harmonics, but transmitter testing requires strict input protection.

Never connect a transmitter output directly to the analyzer input.

Safe harmonic-measurement concept

Transmitter → rated dummy load → directional coupler or RF sampler → external attenuator → TinySA Ultra

Before transmitting:

Calculate the expected sampled power level.
Check the directional-coupler coupling factor.
Check the attenuator power rating.
Use more attenuation than the minimum calculation requires.
Keep the TinySA input comfortably below its maximum level.
Confirm that DC voltage is not present at the analyzer input.
Begin with the transmitter at the lowest suitable power.
Stop immediately if the trace behaves unexpectedly.

Use TinySA Ultra measurement presets where appropriate

TinySA Ultra includes assisted measurement modes for:

Harmonics
Signal-to-noise ratio
Phase noise
Third-order intercept measurements
Occupied width
Channel power
Total harmonic distortion

These modes help configure markers and views. They do not remove the need for safe input levels and correct RF test design.

How to Test an External LNA

TinySA Ultra can help compare an external LNA before and after amplification.

Basic LNA comparison concept

Low-power test source → LNA → external attenuation where required → TinySA Ultra

Compare:

Signal gain
Visible noise-floor change
Overload behavior
Linearity
Frequency response
Performance with and without filtering

TinySA Ultra also includes noise-figure-related features on current firmware versions. Professional noise-figure characterization still requires a suitable calibrated setup and an appropriate noise source.

How to Compare Filters

A TinySA Ultra can help compare RF filters, but a NanoVNA is normally the easier tool for detailed insertion-loss and passband measurements.

Use TinySA Ultra for:

Basic before-and-after signal comparisons
Checking whether an FM rejection filter reduces local broadcast signals
Checking whether an ADS-B filter suppresses out-of-band interference
Observing whether an external filter improves receiver overload behavior

Use a NanoVNA for:

Filter insertion-loss sweeps
Passband shape
Stopband response
Return loss
Antenna SWR
Impedance
Smith Chart analysis

Read our guide: NanoVNA vs TinySA: Which RF Tool Do You Actually Need?.

TinySA Ultra vs NanoVNA

Your Goal	Best Tool
See which RF signals are present	TinySA Ultra
Find interference	TinySA Ultra
Observe harmonics safely	TinySA Ultra
Generate a low-power RF test signal	TinySA Ultra
Measure antenna SWR	NanoVNA
Measure antenna impedance	NanoVNA
Use a Smith Chart	NanoVNA
Measure filter insertion loss and response	NanoVNA
Build a practical RF toolkit	Both

Read our antenna guide: How to Test Antenna SWR with a NanoVNA.

TinySA Ultra vs SDR Receiver

Goal	TinySA Ultra	SDR Receiver
Scan spectrum activity quickly	Excellent portable option	Also possible with software
Measure approximate signal power	Better suited to this purpose	Level display may be less meaningful without calibration
Listen to signals	Limited demodulated-audio capability	Better option
Decode ADS-B, AIS, satellites, and digital modes	Not the primary purpose	Better option
Record wide IQ samples	Not the primary purpose	Better option
Use as a portable field diagnostic	Excellent use case	Requires a phone, tablet, or computer

TinySA Ultra and an SDR receiver complement each other.

Browse software-defined radio receivers and transceivers at SDRstore.eu.

How to Connect TinySA Ultra to a Computer

TinySA Ultra supports USB serial control.

Basic PC-control procedure

Connect the supplied USB cable to the TinySA Ultra.
Connect the other end to the computer.
Allow the operating system to detect the USB serial device.
Use a compatible terminal program or TinySA control application.
Capture screenshots, control the interface, or save trace information where supported.

Official software directions include:

Serial-over-USB terminal control
TinyRemote for basic Windows remote-screen access
Python control libraries
WinSpectrum 3
TinySA-App
QtTinySA for graphical control across supported desktop platforms

Windows and Linux normally include the required USB serial drivers.

How to Save Screenshots and Traces

TinySA Ultra supports MicroSD storage functions.

You can save:

Screen captures
Trace data
Settings
Configuration files
Named captures
Multi-band definitions where supported

Use saved captures for:

Documenting interference
Comparing antennas
Comparing filters
Recording before-and-after changes
Adding images to technical reports
Tracking intermittent RF problems

Useful TinySA Ultra Setup Examples

Example 1: Scan the FM broadcast band

Start: 88 MHz
Stop: 108 MHz
Attenuation: automatic initially
LNA: off initially
Marker: peak search
Use: confirm normal operation and learn the interface

Example 2: Look for interference near a known frequency

Center: target frequency
Span: start broad, then narrow gradually
Trace: max hold
Display: waterfall
RBW: automatic first, then narrower for more detail
Use: identify intermittent or nearby unwanted transmissions

Example 3: Compare antenna locations

Select one stable signal.
Use the same frequency range and settings.
Record the signal level at location A.
Move the antenna to location B.
Compare signal level and noise floor.
Repeat with the internal LNA disabled unless the signal is genuinely weak.

Example 4: Test a low-power receiver input

Use TinySA Ultra signal-generator mode.
Keep output disabled while connecting cables.
Begin with a low generator output level.
Set the expected receiver frequency.
Enable output.
Lower output gradually to compare receiver sensitivity.

Example 5: Compare an FM rejection filter

Scan 88–108 MHz without the filter.
Save a screenshot or note the strongest signal levels.
Install the filter.
Repeat the scan using the same settings.
Compare attenuation across the FM broadcast range.

Common TinySA Ultra Problems and Fixes

The screen shows many false signals

Disable the internal LNA, increase attenuation, reduce antenna signal level, move away from strong transmitters, and use a suitable filter.

The noise floor is too high

Reduce span, reduce RBW, disable unnecessary amplification, remove local electrical-noise sources, and compare antenna locations.

Weak signals disappear

Reduce attenuation, narrow the RBW, narrow the span, use averaging for stable signals, and enable the internal LNA only after checking for overload.

The internal LNA made the scan worse

Disable the LNA. The analyzer or internal amplifier may be overloaded by strong signals. Increase attenuation or add a band-specific filter.

The sweep is slow

Increase RBW, reduce sweep points, narrow the frequency range, disable unnecessary precision modes, and use a faster sweep-accuracy setting where appropriate.

The generator signal is not clean above 800 MHz

This is expected. Higher-frequency generator modes have trade-offs involving square-wave output, spurs, level accuracy, and frequency-step precision.

The TinySA Ultra is not detected by the computer

Try another USB data cable, check the computer USB port, power-cycle the TinySA Ultra, and confirm that the operating system detects a USB serial device.

The level calibration appears invalid

Connect the CAL output to the RF input using a short SMA cable and repeat the level-calibration procedure.

The touch interface is unresponsive

Restart the device. If the issue remains, review the official TinySA fault-finding guide for touch-panel and LCD-cable troubleshooting.

The device shows an unexpected firmware state

Confirm the exact hardware version and load the correct official firmware for that model.

Common TinySA Ultra Setup Mistakes

Connecting a transmitter directly to the RF input

This can damage the analyzer. Use a dummy load, coupler or sampler, external attenuation, and a conservative safety margin.

Leaving the CAL-to-RF cable connected after calibration

Disconnect the cable before enabling generator output.

Turning on the LNA automatically

The LNA is only for weak signals. Disable it when signals are strong or overload symptoms appear.

Assuming internal attenuation protects against any input level

It does not. Use external attenuation before the analyzer input for unknown or higher-power signals.

Using the smallest RBW for every scan

A narrow RBW slows the sweep. Use a wider RBW for broad surveys and reduce it only when more detail is required.

Assuming the extended Ultra-mode range has identical performance everywhere

Sensitivity and accuracy become more limited near the top of the extended range.

Using TinySA Ultra instead of a NanoVNA for SWR

TinySA Ultra observes RF spectrum. Use a NanoVNA for antenna SWR, impedance, return loss, and Smith Chart measurements.

Using TinySA Ultra as a compliance analyzer

TinySA Ultra is a valuable portable diagnostic tool. Professional certification and regulatory testing require suitable calibrated laboratory equipment and procedures.

Recommended TinySA Ultra Starter Workflow

Charge the battery.
Confirm firmware and authenticity.
Run self-test.
Run level calibration.
Disconnect the calibration cable.
Enable Ultra mode if required.
Scan FM broadcast signals to learn the interface.
Practice start and stop frequency settings.
Practice center and span settings.
Use peak search.
Test max hold.
Test waterfall mode.
Learn how RBW changes sweep speed and detail.
Practice attenuation on strong receive signals.
Enable the LNA only on a quiet band with weak signals.
Test low-power signal-generator output using a protected bench setup.
Save screenshots and traces to MicroSD.
Connect TinySA Ultra to a computer for remote control.

Where to Buy TinySA Ultra and RF Test Equipment

Related SDRstore.eu Guides

Official Resources

Final Verdict: TinySA Ultra Setup Guide

TinySA Ultra is a powerful portable RF diagnostic tool when it is configured and protected correctly.

Begin by charging the battery, checking firmware, running the self-test, and completing level calibration with a short SMA cable connected between CAL and RF.

Use normal spectrum-analyzer mode for routine scans. Start with a broad frequency range, automatic attenuation, and the internal LNA disabled. Use markers and peak search to locate signals. Narrow the span and reduce RBW when you need more detail. Use max hold and waterfall mode for intermittent activity.

Enable the internal LNA only when measuring weak signals in a relatively clean RF environment. Disable it if false signals, a rising noise floor, or overload symptoms appear.

Use internal attenuation for routine optimization and an external attenuator for input protection. Never connect a transmitter, RF amplifier, or unknown source directly to the analyzer input.

Use signal-generator mode for controlled low-power receiver tests and educational experiments. Above approximately 800 MHz, remain aware of output-mode trade-offs involving harmonics, spurs, and level accuracy.

Add a NanoVNA when you need SWR, impedance, Smith Chart, cable, and filter-response measurements. Together, TinySA Ultra and NanoVNA form a practical portable RF toolkit.

FAQ

What is TinySA Ultra?

TinySA Ultra is a portable touchscreen spectrum analyzer with an internal signal generator, built-in calibration source, optional internal LNA, internal step attenuator, USB control, MicroSD storage, and a rechargeable battery.

What frequency range does TinySA Ultra cover?

The standard TinySA Ultra covers approximately 100 kHz–800 MHz in normal mode and extends into the GHz range with Ultra mode enabled. The official model comparison lists approximately 5.3 GHz for standard Ultra-mode scanning, with level calibration extending higher.

How do I calibrate TinySA Ultra?

Connect the CAL output to the RF input using a short SMA cable, open CONFIG, select LEVEL CAL, and run CALIBRATE 100kHz to 5.34GHz. Disconnect the cable after calibration.

Do I need to calibrate TinySA Ultra before every measurement?

No. Complete the initial level calibration during setup. Calibration data is stored in the device and does not need to be repeated before every normal measurement.

How do I enable Ultra mode?

Open CONFIG and select ENABLE ULTRA through the relevant configuration menu. Ultra mode extends scanning beyond the normal frequency range.

Should I leave Ultra mode enabled?

You can leave Ultra mode enabled for convenience. Remember that sensitivity and level accuracy become more limited near the top of the extended range.

What is RBW on TinySA Ultra?

RBW means resolution bandwidth. A narrower RBW helps separate nearby signals and reveal weaker peaks but slows the sweep. A wider RBW scans faster with less detail.

What is VBW on TinySA Ultra?

VBW means video bandwidth. It smooths the displayed trace after detection. Use lower VBW settings for a cleaner stable trace, but avoid excessive smoothing when looking for short signals.

How do I find the strongest signal?

Enable a marker and select PEAK SEARCH. The marker moves to the strongest visible signal within the selected scan range.

What does max hold do?

Max hold stores the highest level observed at each frequency across several sweeps. It is useful for intermittent signals and short transmissions.

What does waterfall mode do?

Waterfall mode displays frequency activity over time. It is useful for observing intermittent, changing, and frequency-hopping signals.

What is the TinySA Ultra internal attenuator?

The internal attenuator reduces signal level before it reaches sensitive internal circuitry. TinySA Ultra supports attenuation from 0 dB to 31 dB when the built-in LNA is disabled.

Do I need an external attenuator?

Use an external attenuator when measuring unknown signals, transmitter samples, amplifier outputs, or sources that may exceed the safe TinySA input level.

Can I connect a radio transmitter directly to TinySA Ultra?

No. Never connect a transmitter output directly to TinySA Ultra. Use a rated dummy load, suitable coupler or RF sampler, external attenuation, and a conservative safety margin.

What is the built-in TinySA Ultra LNA?

The built-in LNA is an optional low-noise amplifier that adds approximately 20 dB of gain for weak-signal measurements. When enabled, the internal attenuator is disabled.

When should I enable the built-in LNA?

Enable the LNA only when the target signal is weak and the RF environment is relatively quiet. Disable it if false signals, overload, or a rapidly rising noise floor appear.

Can the TinySA Ultra LNA make measurements worse?

Yes. Strong signals can overload the LNA or analyzer input and create false signals, distortion, and misleading results.

Does TinySA Ultra include a signal generator?

Yes. TinySA Ultra includes a low-power signal generator with sine-wave output up to approximately 800 MHz on the standard model and additional high-frequency output modes with trade-offs involving harmonics, spurs, and level accuracy.

Can TinySA Ultra generate AM and FM signals?

Yes. Signal-generator mode supports basic AM and FM modulation for receiver testing and educational experiments.

Can TinySA Ultra test harmonics?

Yes, but transmitter testing requires a protected RF setup with a rated dummy load, coupler or sampler, external attenuation, and safe input levels.

Can TinySA Ultra measure antenna SWR?

TinySA Ultra is not the normal tool for antenna SWR measurements. Use a NanoVNA for SWR, impedance, return loss, and Smith Chart analysis.

Is TinySA Ultra better than NanoVNA?

They solve different problems. TinySA Ultra shows RF spectrum and signal activity. NanoVNA measures antenna SWR, impedance, cables, and filter response. Many RF users benefit from owning both.

Can TinySA Ultra connect to a computer?

Yes. TinySA Ultra supports USB serial control and compatible PC software for screenshots, remote control, trace capture, and additional workflows.

Can TinySA Ultra save screenshots?

Yes. TinySA Ultra supports MicroSD storage for screenshots, traces, settings, and configuration files.

Is TinySA Ultra suitable for professional compliance testing?

TinySA Ultra is a valuable portable diagnostic tool. Regulatory certification and professional compliance testing require suitable calibrated laboratory equipment and procedures.

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