Hi, I've designed an adapter board for u-blox' RCB-F9T breakout board for the ZED-F9T timing GNSS receiver. Primary design goal was to improve upon the RCB-F9T's interface situation (only 2.0 mm 2x4 pin header for UART and time pulse outputs). My adapter PCB's interfaces are micro USB (connected to the ZED-F9T UART via a SiLabs CP2102 USB-to-UART bridge) and two SMA connectors with 50 Ohm source impedance capable of driving a 50 Ohm load (via a TI BUF602 buffer opamp). Since quite a few of us seem to be using the RCB-F9T, I wanted to put my adapter PCB up for review before I have it manufactured. While I will not take orders for the board, anyone interested could order it from a fab house of their choice. Therefore, I'm interested in minor changes that could make it usable for more of us. I'll release the design files (KiCad) and gerbers once I've verified the design is functional. I've attached schematic, layout, and two 3D renderings. The latter hopefully illustrate how the RCB-F9T neatly plugs on top of the adapter board. The adapter PCB is the same width as the RCB-F9T and ~16 mm longer to accommodate the SMA side-mount connectors. Best regards, Carsten

Hello everyone, while I've had the boards manufactured last September, they've been sitting on my desk ever since. Finally got to testing them. Except for a minor mishap with the RCB-F9T's RST pin (which is actually an NRST), the design works as planned. As promised, I've released the KiCAD files on Github: https://github.com/carstenandrich/Adapter_RCB_F9T Best regards, Carsten On 21.08.22 18:49, Carsten Andrich wrote: > Hi, > > I've designed an adapter board for u-blox' RCB-F9T breakout board for > the ZED-F9T timing GNSS receiver. Primary design goal was to improve > upon the RCB-F9T's interface situation (only 2.0 mm 2x4 pin header for > UART and time pulse outputs). My adapter PCB's interfaces are micro > USB (connected to the ZED-F9T UART via a SiLabs CP2102 USB-to-UART > bridge) and two SMA connectors with 50 Ohm source impedance capable of > driving a 50 Ohm load (via a TI BUF602 buffer opamp). > > Since quite a few of us seem to be using the RCB-F9T, I wanted to put > my adapter PCB up for review before I have it manufactured. While I > will not take orders for the board, anyone interested could order it > from a fab house of their choice. Therefore, I'm interested in minor > changes that could make it usable for more of us. I'll release the > design files (KiCad) and gerbers once I've verified the design is > functional. > > I've attached schematic, layout, and two 3D renderings. The latter > hopefully illustrate how the RCB-F9T neatly plugs on top of the > adapter board. The adapter PCB is the same width as the RCB-F9T and > ~16 mm longer to accommodate the SMA side-mount connectors. > > Best regards, > Carsten