2023-02-06 (v4.3)
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 * Suppress U7x,U7xb (old RF switch) totally on PCB.
 * Split Pwr_1 Schematic into Pwr_1 and Pwr_2 to fit A4 format.
 * Add C40x and C40xb to split Net between filter F3B38 and F4B4243.

2022-12-01 (v4.2)
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 * fix the bug with TA1968A (filter for Band 38) footprint
 * fix the ublox footprint (this was not creating any bug, only for cleanup)
 * change the value of resistors R[13-20]y (47k -> 68k) to match more the new input voltage
 * remove some capacitors around GPS

2022-07-21 (v4.1)
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WARNING: this version has a bug in Band38, DO NOT USE.

The target for this version was to improve the output power.

 * remove FDD support (only supports TDD now)
 * for each channel, use 4 amplifiers from Gpowertek (24dBm) instead of 2 from
   Skyworks (27dBm) because Skyworks amplifier were not available anymore. This
   keeps the output power of approximately 30dBm per channel.
 * for each channel, the output power filter is removed and replaced by two saw
   filters, one at the input of the RF amplifiers and the second at the input
   of the LNA Rx amplifier. This removes the power lost in the filter.
 * the output switch is replaced with a lower insertion loss switch. Nevertheless,
   we keep the original switch as an option to increase the isolation between the Tx and Rx channels.
 * input voltage range is now 24V-55V (instead of 12V-55V)

2020-12-22 (v3.4)
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 * changes the name of the project "ORS: Open Radio Station"
 * updates the marking of the board

2020-08-06 (v3.2)
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 * add the possibility of mounting a temperature compensated oscillator to avoid synchronization by GPS
 * GPS module has changed to the ublox NEOM8
 * decoupling capacitors have been added on 1.3V and 2.5V power supplys
 * FT232HQ decoupling changed by modifying ferrite beads reference
 * the board shape changes and another mounting hole is added

2019-01-15 (v3.1)
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First version of SDR PCB containing the following features:
 * based on Amarisoft SDR board
 * supports up to 40MHz bandwidth
 * USB connection to access FPGA JTAG
 * TDD/FDD support
 * supports all bands for which Skyworks/Qorvo ampli are available

This PCB was designed by Jean-Marc Ouvrard and Jean-Samuel Najnudel.
