The LibreVNA open-source two-port vector network analyzer (100 kHz to 6 GHz): its specifications and how we use it to measure the frequency response of Rigol scopes running NovaOS.
| Frequency range | 100 kHz to 6 GHz (native); up to 8 GHz with harmonic mixingData sheet, p. 1 |
| Stimulus power | -40 to 0 dBm (maximum power drops with increasing frequency)Data sheet, p. 1 |
| Dynamic range (stimulus 0 dBm, 10 Hz IF BW) | 5-2940 MHz, S21: 85 dB min, 105 dB typ; >2940 MHz, S21: 50 dB min, 60 dB typData sheet, p. 1 |
| IF bandwidth | 10 Hz to 50k HzData sheet, p. 1 |
| Acquisition speed (50 kHz IF BW) | 10k points/s (typ)Data sheet, p. 1 |
| Signal generator | 100 kHz to 6 GHz, -40 to 0 dBmData sheet, p. 1 |
| Spectrum analyzer | 100 kHz to 6 GHz; input power -5 dBm max; resolution bandwidth 13 Hz to 112k Hz; phase noise -103 dBc/Hz typ (1 GHz, 10 kHz offset)Data sheet, p. 1 |
LibreVNA's own figures, as its documents state them; each links to the page it is on.
LibreVNA is open hardware: its design and software are published, and the figures above are the project's own preliminary specification sheet.
Sends a signal through a cable, filter or circuit at frequency after frequency and measures how much gets through and how much bounces back.
A clean sine source for measuring each channel's frequency response and the bandwidth limits, and it measures the loss of the cables and splitter in that path.
Set to one frequency at a time, it is a clean sine source far past each scope's bandwidth, for measuring each channel's frequency response and the band limits; as a network analyzer it measures the loss of the cables and splitter in that path, so the scope's own response can be told apart from theirs.
The tests we will run with it next; the results will appear here.
Forum threads worth reading before you buy one.
Back to the bench: everything NovaOS is developed and measured with.