Spectrum Analyzer units of measure
Converting from dBm/Hz to V/√Hz
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Moku:Go
Moku:Go Arbitrary Waveform Generator Moku:Go Data Logger Moku:Go Frequency Response Analyzer Moku:Go Logic Analyzer & Pattern Generator Moku:Go Oscilloscope & Voltmeter Moku:Go PID Controller Moku:Go Spectrum Analyzer Moku:Go Waveform Generator Moku:Go Power Supplies Moku:Go Digital Filter Box Moku:Go FIR Filter Builder Moku:Go Lock-in Amplifier Moku:Go General Moku:Go Logic Analyzer/Pattern Generator Moku:Go Time & Frequency Analyzer Moku:Go Laser Lock Box Moku:Go Phasemeter
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Moku:Lab
Moku:Lab General Moku:Lab Arbitrary Waveform Generator Moku:Lab Data Logger Moku:Lab Digital Filter Box Moku:Lab FIR Filter Builder Moku:Lab Frequency Response Analyzer Moku:Lab Laser Lock Box Moku:Lab Lock-in Amplifier Moku:Lab Oscilloscope Moku:Lab Phasemeter Moku:Lab PID Controller Moku:Lab Spectrum Analyzer Moku:Lab Waveform Generator Moku:Lab Time & Frequency Analyzer Moku:Lab Logic Analyzer/Pattern Generator
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Moku:Pro
Moku:Pro Arbitrary Waveform Generator Moku:Pro Data Logger Moku:Pro Frequency Response Analyzer Moku:Pro Oscilloscope Moku:Pro PID Controller Moku:Pro Spectrum Analyzer Moku:Pro Waveform Generator Moku:Pro Lock-in Amplifier Moku:Pro Digital Filter Box Moku:Pro FIR Filter Builder Moku:Pro Phasemeter Moku:Pro Multi-instrument Mode Moku:Pro General Moku:Pro Logic Analyzer/Pattern Generator Moku:Pro Time & Frequency Analyzer
- Python API
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- Frequency Response Analyzer
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- Waveform Generator
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- LabVIEW
The Moku:Lab Spectrum Analyzer can display the spectrum amplitude in various units (dBm, Vrms, Vpp and dBV). Additionally, you can select corresponding power spectral density (PSD) units (dBm/Hz, Vrms/√ Hz, Vpp/√Hz and dBV/√ Hz). It is worth noting that the Resolution Band Width (RBW) setting only affects the measurement in PSD units.
Below is an example from the Moku:Lab demo mode, the channel 1 peak is shown at -73.75 dBm/Hz.
This can be converted to Vrms/√Hz by relationship P [mW/Hz] = 10^ (P [dBm/Hz] / 10)
So in this case, P = 4.22 x 10 -8 mW/Hz
Also, V= √( P x R) and that here 50 ohms is the conventional nominal impedance.
Thus the spectral peak in volts, allowing for conversion from mW to W, is
V = √( 50 x 4.22 x 10 -11)
V = 45.9 μV/√Hz
In this second screenshot of the Moku:Lab Spectrum Analyzer demo mode, the units have been switch to uV/√Hz.