Radio Board Updates

[tmolteno]

• [x] Enable the RX driver for the clock.
• [x] Add More Radio, update footprint for connector.
• [ ] Filter capacitors on the ANTENNA_BIAS voltage
• [ ] Trace impedance calculations (50 Ohms for Antenna input)
• [x] Connect the EN line to the radios (SHDN). Allow power sequencing
• [x] Gold coating of the PCIe fingers

Tests to Perform:

• [ ] Crosstalk
• [x] Clocking (existence of clock to all radios)
• [x] Pre-configured device states.
• [x] DSP Interface modes
• [x] Sensitivity measurement using Signal Generator
• [x] Clock Output using test point.

[tmolteno]

Look into the ground planes...

If you have separated ground planes make sure no trace crosses the gab between them. Otherwise you just build a slot antenna.

If you must have separated ground and need to cross over it with a trace make you need to provide a direct path for the return current. This is done by placing a capacitor that connects your two ground planes as near as possible to the trace. A 1 nF ceramic will do.

[tmolteno]

Minor update: Reorder radios on the boards.