Difference between revisions of "TinySA"

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== TinySA - Spectrum Analyzer ==
+
[[file:tinySA.jpg]]
  
 +
== TinySA - Spectrum Analyzer - 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
 +
* 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 without attenuation of +10dBm
 +
* Absolute maximum input power with 30dB attenuation of +20dBm for short period
 +
* Input Intercept Point of third order modulation products (IIP3) with 0dB attenuation of +15dBm
 +
* 1dB compression point at +2dBm with 0dB 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 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
 +
* As there is no input bandfilter strong 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
 +
* 1dB compression point at -6dBm with 0dB 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
 +
* Selectable (automatic and manual) resolution filters of 3, 10, 30, 100, 300 and 600kHz
 +
* Optional 25dB to 40dB frequency dependent input attenuator. The power level error with this attenuator activated increases to +/- 15dB
 +
* On screen resolution of 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 level selectable in 1dB steps between -76dBm and -6dBm
 +
* Optional AM, narrow FM and wide FM modulation or slow sweep over selectable frequency span
 +
 +
=== High output mode spec ===
 +
 +
* Square wave output
 +
* Output frequency range from 240MHz to 960MHz
 +
* Output level selectable in variable increments between -38dBm and +13dBm
 +
* Optional narrow FM and wide FM modulation or slow sweep over 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
 
* Maximum input level
 
* Maximum input level
 
** 0 dBm = 1 mW
 
** 0 dBm = 1 mW
Line 9: Line 86:
 
* 3.3V at 50 Ohm = 0.2178W
 
* 3.3V at 50 Ohm = 0.2178W
 
** 217.8 mW = 23.4 dBm
 
** 217.8 mW = 23.4 dBm
 +
 +
== Attenuators ==
 +
 +
* [[RF Attenuators|Homebrew RF Attenuators]]
 +
* [[PE4302 RF Attenuator]] - Digitally controlled attenuator
 +
 +
== References ==
 +
 
* [https://www.tinysa.org/wiki/ tinySA wiki]
 
* [https://www.tinysa.org/wiki/ tinySA wiki]
 +
* [http://athome.kaashoek.com/tinySA/Windows/ tinySA-App Software]
 +
* [https://store2.rlham.com/shop/catalog/product_info.php?products_id=75243&osCsid=adsqkp0uum898eahocj1marc43 R&L page]
 +
 +
== Measurements ==
 +
 +
=== No Stimulus ===
 +
 +
* 50 Ohm terminator on Low port
  
−
== Attenuators ==
+
[[file:Tiny-SA App v1.1.19.20.PNG]]
  
−
=== 30 dB Attenuator ===
+
=== VFO-001 ===
  
−
* [http://leleivre.com/rf_pipad.html Pi Attenuator Calculator]
+
[[File:VFO-001_P132-720px.jpg]]
  
−
[[file:30dB_Attenuator.PNG]]
+
* [[VFO-001]]
 +
* Set to 20 MHz
 +
* 3.3V square wave drive
 +
* Rich odd harmonic content
 +
* Lots of other noise
 +
* Using 20 dB attenuator (from above)
 +
* 1-301 MHz
  
−
* Built
+
[[file:VFO-002_20dB_001.PNG]]
−
** Standard 5% resistor values
 
−
** R2 = 2 paralleled 120 Ohm 1/4W resistors paralleled with 470 ohms = 53.2 ohms
 
−
** R1 = 820 in parallel with 22K = 790.6 ohms
 
−
** Flat from 0-30 MHz
 
−
** Measured attenuation is flat
 
−
*** -30.01dB at 1 MHz
 
−
*** -30.24dB at 30 MHz
 
−
** 53.1 ohms, 21.3nF
 
−
** SWR 1.06
 
−
** 1/2W max (5VDC max, 0 ohm source)
 
−
* LTSPICE Simulation
 
−
[[file:LTSPice_30dB.PNG]]
 
  
−
=== 20 dB Attenuator ===
+
== Attenuator Charts ==
  
−
[[file:20dB_Attenuator.PNG]]
+
[[file:dBm_vs_milliVolt_milliWatts.PNG]]
  
−
* Build
+
[[file:dBm_vs_Volta_Watts.PNG]]
−
** Standard 5% resistor values
 
−
** R2 = 2 paralleled 150 Ohm 1/2W resistors paralleled with 330 ohms = 61.11 ohms
 
−
** R1 = 510 in parallel with 8.2K = 247.3 ohms
 
−
** Flat from 0-30 MHz
 
−
** Measured attenuation is flat
 
−
*** -tbd dB at 1 MHz
 
−
*** -tbd4dB at 30 MHz
 
−
** tbd ohms, tbd nF
 
−
** SWR tbd
 
−
** 1W max (8.6 V max, 0 ohm source)
 
−
* LTSPICE Simulation
 
  
−
== Videos ==
+
[[file:dBm_vs_Volt_Watts.PNG]]
  
 +
== Calibrating the Frequency of the tinySA ==
  
 +
<video type="youtube">5dHFF03mupI</video>
 +
 +
== Videos ==
  
 
<video type="youtube">n6WEM3--Npc</video>
 
<video type="youtube">n6WEM3--Npc</video>
  
 
<video type="youtube">Sdb_cs13njk</video>
 
<video type="youtube">Sdb_cs13njk</video>
 +
 +
<video type="youtube">qxH0CQOf2NM</video>
 +
 +
<video type="youtube">1mulRI-EZ80</video>

Latest revision as of 16:09, 21 August 2022

TinySA.jpg

TinySA - Spectrum Analyzer - 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
  • 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 without attenuation of +10dBm
  • Absolute maximum input power with 30dB attenuation of +20dBm for short period
  • Input Intercept Point of third order modulation products (IIP3) with 0dB attenuation of +15dBm
  • 1dB compression point at +2dBm with 0dB 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 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
  • As there is no input bandfilter strong 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
  • 1dB compression point at -6dBm with 0dB 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
  • Selectable (automatic and manual) resolution filters of 3, 10, 30, 100, 300 and 600kHz
  • Optional 25dB to 40dB frequency dependent input attenuator. The power level error with this attenuator activated increases to +/- 15dB
  • On screen resolution of 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 level selectable in 1dB steps between -76dBm and -6dBm
  • Optional AM, narrow FM and wide FM modulation or slow sweep over selectable frequency span

High output mode spec

  • Square wave output
  • Output frequency range from 240MHz to 960MHz
  • Output level selectable in variable increments between -38dBm and +13dBm
  • Optional narrow FM and wide FM modulation or slow sweep over 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
  • Maximum input level
    • 0 dBm = 1 mW
    • dBm = 10*LOG(milliwatts)
    • -10 dBm = 0.1 mW
    • +10dBm = 10 mW
    • +20dBm = 1000 mW
  • 3.3V at 50 Ohm = 0.2178W
    • 217.8 mW = 23.4 dBm

Attenuators

References

Measurements

No Stimulus

  • 50 Ohm terminator on Low port

Tiny-SA App v1.1.19.20.PNG

VFO-001

VFO-001 P132-720px.jpg

  • VFO-001
  • Set to 20 MHz
  • 3.3V square wave drive
  • Rich odd harmonic content
  • Lots of other noise
  • Using 20 dB attenuator (from above)
  • 1-301 MHz

VFO-002 20dB 001.PNG

Attenuator Charts

DBm vs milliVolt milliWatts.PNG

DBm vs Volta Watts.PNG

DBm vs Volt Watts.PNG

Calibrating the Frequency of the tinySA

Videos

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