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document firmware versions

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Brendan Haines 2025-01-15 22:59:29 -07:00
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README.md
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@ -39,7 +39,9 @@ Without this, you'll be limited to S11 and uncalibrated S21 measurements (with r
There's nothing special about this particular board, if you want more than 4 ports you can make your own pretty easily. You just need 3 SPxT switches. Note that these switches will see tons of cycles so avoid mechanical switches.
- SMA cables
### Pluto Modification
### Pluto Configuration
Most of my testing is with Pluto firmware [v0.39](https://github.com/analogdevicesinc/plutosdr-fw/releases/tag/v0.39) though this may work with other firmware versions. Instructions for upgrading firmware are on the [Analog Devices wiki](https://wiki.analog.com/university/tools/pluto/users/firmware).
We need two receive channels on the SDR. If you have a Pluto+ that should already be configured and you can skip this step.