From 5184c05bb5f5cd66ffefa31f565305bc0a04a9a8 Mon Sep 17 00:00:00 2001 From: Brendan Haines Date: Thu, 26 Jun 2025 21:37:41 -0600 Subject: [PATCH] README formatting --- README.md | 11 +++++++---- 1 file changed, 7 insertions(+), 4 deletions(-) diff --git a/README.md b/README.md index a9f6dcf..454533b 100644 --- a/README.md +++ b/README.md @@ -1,9 +1,9 @@ # Charon VNA + - Named after [Pluto's moon](https://en.wikipedia.org/wiki/Charon_(moon)), Charon uses the [ADI Pluto SDR](https://www.analog.com/en/resources/evaluation-hardware-and-software/evaluation-boards-kits/adalm-pluto.html) as a vector network analyzer. The basic usage is as a 1 port VNA but this can be extended to arbitrarily many ports with the addition of a couple RF switches. ## Installation @@ -53,6 +53,7 @@ It will also be accessible over a socket to enable test automation with external TBD ### Power Calibration + I include a default output power lookup table. This is derived from two TX channels of two Pluto SDRs and does not include any of the loss of a coupler or Charon switch board. Absolute output power is generally not well calibrated for VNAs anyway and has negligible impact on most measurements so this is probably sufficient for most users. If you're trying to run a power sweep this may be insufficient. @@ -64,11 +65,13 @@ Note that unlike the main calibration, power calibration frequencies do not need ## References #### Pluto Default Connection Settings -user: `root` -password: `analog` -ip: `192.168.2.1` + +- user: `root` +- password: `analog` +- ip: `192.168.2.1` ## Alternatives + - [NanoVNA](https://nanovna.com/). 2-ports. 50 kHz - 2.7 GHz. Degraded performance above 1.5 GHz. S11 and S21 only. - [pluto-network-analyzer](https://github.com/fromconcepttocircuit/pluto-network-analyzer). 2-ports. 100 MHz - 3 GHz. S11 and S21 only. Uses a [wideband RF bridge](https://www.60dbm.com/product/rf-bridge-1-3000-mhz/) instead of a coupler - [LibreVNA](https://github.com/jankae/LibreVNA). 2-ports. 100 KHz - 6 GHz. I've never used this but it is almost certainly faster than Charon. Not sure how the performance compares. $700 on [AliExpress](https://www.aliexpress.us/item/3256802242049773.html?gatewayAdapt=glo2usa4itemAdapt) \ No newline at end of file