Tiny SA-Spectrum Analyzer

$59.99

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  • include battery;

Availability: 3333 In Stock

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Description

The tinySA is a small spectrum analyzer, primarily intended for 0.1MHz to 350MHz input but it has some nice other capabilities:

  • Spectrum Analyzer with two inputs, high-quality MF/HF/VHF input for 0.1MHZ-350MHz, lesser quality UHF input for 240MHz-960MHz.
  • Switchable resolution bandpass filters for both ranges between 2.6kHz and 640kHz
  • Color display showing 290 scan points covering up to the full low or high-frequency range.
  • Input Step attenuator from 0dB to 31dB for the MF/HF/VHF input.
  • When not used as Spectrum Analyzer it can be used as Signal Generator, MF/HF/VHF sinus output between 0.1MHZ-350MHz, UHF square wave output between 240MHz-960MHz.
  • A built-in calibration signal generator that is used for automatic self-test and low input calibration.
  • Connected to a PC via USB it becomes a PC controlled Spectrum Analyzer
  • Rechargeable battery allowing a minimum of at least 2 hours portable use
  • Max input level +10dBm. Do not destroy your tinySA
  • Due to the low cost and very small form factor, there are certain relevant limitations.

OverView

A short 7-minute video introducing the main features of the tinySA can be found here. More videos on my YouTube channel

There are a number of video reviews of the tinySA by IMSAY Guy on YouTube. If you go there, make sure you also watch the later videos as IMSAY Guy was still learning how the use the tinySA in his first videos

Sort of manual

For those that prefer to read a document instead of browsing a wiki, Kurt Poulson was so kind to write an extensive document explaining various aspects of the tinySA for a Danish Amateur Radio magazine. The English version can be found here. Kurt describes the operation of the signal generator and spectrum analyzer functions and explains how to update the FW. The document contains many screen captures of example measurements.

 


Specifications

User interface:

  • Display resolution 320*240 pixels
  • Screen diagonal 2.8″
  • 16 bits per RGB pixels
  • Resistive touch control
  • Jog switch control
  • USB serial port control
  • Optional TTL USART port (SW not yet implemented) on the internal PCB
  • Linear power supply to avoid switching noise.

The input/output specification of the tinySA is split over the 4 modes

Low input mode spec:

  • Input frequency range from 100kHz to 350MHz (with some limitations down to 10kHz)
  • Input impedance 50 ohm when input attenuation set to 10dB or more.
  • Selectable manual and automatic input attenuation between 0dB and 31dB in 1 dB steps
  • Absolute maximum input level of +10dBm with 0dB internal attenuation
  • Absolute maximum short term peak input power of +20dBm with 30dB internal attenuation
  • The suggested maximum input power of +5dBm with internal attenuation in automatic mode
  • For best measurements keep input power below -25dBm
  • Input Intercept Point of third-order modulation products (IIP3) of +15dBm with 0dB internal attenuation
  • 1dB compression point at -1dBm with 0dB internal attenuation
  • Power detector resolution of 0.5dB and linearity versus frequency of +/-1dB
  • Absolute power level accuracy after power level calibration of +/- 1dB
  • Lowest discernible signal using a resolution bandwidth of 30kHz of -102dBm
  • Frequency accuracy equal to the selected resolution bandwidth
  • Phase noise of -90dB/Hz at 100kHz offset and -115dB/Hz at 1MHz offset
  • Spur free dynamic range when using a 30kHz resolution bandwidth of 70dB
  • Manually selectable resolution filters of 3, 10, 30, 100, 300, 600kHz. Automatic selection of one of the 57 resolution filters.
  • On-screen resolution of 51, 101, 145 or 290 measurement points.
  • Scanning speed of over 1000 points/second using largest resolution filters.
  • Automatic optimization of actual scanning points to ensure coverage of the whole scan range regardless of the chosen resolution bandwidth
  • Spur suppression option for assessing if certain signals are internally generated or actually present in the input signal

High input mode spec:

  • Input frequency range from 240MHz to 960MHz
  • Input impedance is frequency-dependent and deviates from 50 ohm
  • As there is no input band filter, strong input signals outside the 240MHz to 960MHz range can cause distortion of the in-band signals
  • Absolute maximum input level without attenuation of +10dBm
  • Input Intercept Point of third-order modulation products (IIP3) of -5dBm with no internal attenuation
  • 1dB compression point at -6dBm with no internal attenuation
  • Power detector resolution of 0.5dB and linearity versus frequency of +/-1dB
  • Absolute power level accuracy after power level calibration of +/- 1dB
  • Lowest discernible signal using a resolution bandwidth of 30kHz of -115dBm
  • Frequency accuracy equal to the selected resolution bandwidth
  • Spur free dynamic range when using a 30kHz resolution bandwidth of 50dB
  • Manually selectable resolution filters of 3, 10, 30, 100, 300, 600kHz. Automatic selection of one of the 57 resolution filters.
  • Optional 25dB to 40dB frequency dependent input attenuator. The power level error with this attenuator activated increases to +/- 10dB
  • On-screen resolution of 51, 101, 145, or 290 measurement points.
  • Scanning speed of over 1000 points/second using largest resolution filters.
  • Automatic optimization of actual scanning points to ensure coverage of the whole scan range regardless of the chosen resolution bandwidth

Low output mode spec:

  • Sinus output with harmonics below -40dB of fundamental
  • Output frequency range from 100kHz to 350MHz
  • Output frequency resolution either 156Hz or 312Hz, depending on the selected frequency
  • Output level selectable in 1dB steps between -76dBm and -6dBm
  • Optional AM, narrow FM, and wide FM modulation with frequencies between 50Hz and 6kHz or slow sweep over a selectable frequency span
  • Optional output level sweep over maximum the entire output level range

High output mode spec:

  • Square wave output
  • Output frequency range from 240MHz to 960MHz
  • Output frequency resolution either 156Hz or 312Hz, depending on the selected frequency
  • Output level selectable in variable increments between -38dBm and +13dBm
  • Optional narrow FM and wide FM modulation with frequencies between 50Hz and 6kHz or slow sweep over a selectable frequency span

Reference generator spec:

  • Optional square wave output with fundamental at -25dBm connected to high input/output
  • Frequency can be set to 1MHz, 2MHz, 4MHz, 10MHz, 15MHz or 30MHz.

Battery spec:

  • Charging time max 1 hour on 500mA minimum USB port or USB charger
  • Operation on fully charged battery for at least 2 hours

Technical Description

The tinySA contains all the components of a conventional heterodyne swept spectrum analyzer.

 

 

 

 

 

 

 

The components used in low input mode are:

  • In low input mode, the signal enters the tinySA through the low SMA connector
  • 0-31dB settable Attenuator to protect the RX and prevent internally generated harmonics distortion
  • 350MHz low pass filter to eliminate aliases
  • A TX block that contains the local oscillator to do the scanning of the selected frequency range.
  • The switch is used to enable the tracking output to the high output if activated
  • Mixer that mixes the output from the low pass filter with the local oscillator to create the high IF.
  • Bandpass filter at 433.9MHz for the high IF that eliminates spurs and cleans the output from the mixer before the downconversion.
  • A switch to route the output of the BPF to the RX
  • And RX containing
    • Second LO and mixer to downconvert the high IF to a low IF at 870kHz.
    • Selectable resolution filters between 3kHz and 600kHz.
    • Power detector with 120dB dynamic range after the resolution filter.

The components used in high input mode are:

  • In high input mode, the signal enters the tinySA through the high SMA connector
  • A switch to route the high input to the RX block
  • An RX block containing
    • LO and mixer to downconvert the selected frequency range to a low IF at 870kHz. Mirror suppression is limited to 30dB
    • Selectable resolution filters between 3kHz and 600kHz.
    • Power detector with 120dB dynamic range after the resolution filter.A local oscillator that does the

The components used in low output mode are:

  • TX block with Local oscillator generating 433.9MHz
  • A switch to route the TX output to the Band Pass Filter
  • Bandpass filter removing the harmonics of the 433.9MHz local oscillator.
  • Second TX with a local oscillator that determines the output frequency.
  • A mixer that mixes the output from the bandpass filter with the second local oscillator to create the desired output frequency with limited harmonics
  • Low pass filter for the low output to remove unwanted mixer products.
  • Output attenuator connected between the low pass filter and the low output to optionally reduce the output level
  • The generated signal leaves the tinySA through the low SMA connector

The components used in high output mode are:

  • A local oscillator that determines the output frequency.
  • A power amplifier with selectable output power between +5dBm and +20dBm
  • The switch connects the power amplifier to the high SMA connector

The calibration generator:

  • 30MHz temperature-controlled crystal oscillator
  • Selectable dividers to create 30, 15, 10, 4, 3, 2 or 1 MHZ
  • The fixed-voltage output driver
  • High accuracy attenuator to create a 30MHz fundamental of -25dBm into 50 ohms as power reference connected to the high output.

Weight 0.1 g
Dimensions 10 × 20 × 5 cm
Resolution bandpass

2.6kHz and 640kHz

Inputs

0.1MHZ-350MHz, 240MHz-960MHz

Input Step attenuator

0dB to 31dB

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