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Software/portapack-mayhem/hackrf/hardware/neapolitan/README

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+Copyright 2012 - 2016 Great Scott Gadgets
+
+These files are part of HackRF.
+
+This is a free hardware design; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+This design is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this design; see the file COPYING.  If not, write to
+the Free Software Foundation, Inc., 51 Franklin Street,
+Boston, MA 02110-1301, USA.
+
+
+Neapolitan is an add-on for HackRF One enabling full-duplex operation.
+
+hardware notes:
+
+Schematic and layout files were designed in KiCad, an open source electronic
+design automation package.
+
+order of copper layers:
+    Copper 1:  C1F (front)
+    Copper 2:  C2
+    Copper 3:  C3
+    Copper 4:  C4B (back)
+
+PCB description: 4 layer PCB 0.062 in
+    Copper        1   0.5 oz foil plated to approximately 0.0017 in
+    Dielectric  1-2   0.0119 in
+    Copper        2   1 oz foil (0.0014 in)
+    Dielectric  2-3   0.0280 in
+    Copper        3   1 oz foil (0.0014 in)
+    Dielectric  3-4   0.0119 in
+    Copper        4   0.5 oz foil plated to approximately 0.0017 in
+
+FR4 or similar substrate with Er=4.5 (+/- 0.1)
+double side solder mask green
+single side silkscreen white
+6 mil min trace width and
+6 mil min isolation