Today I used a cheap external active GPS antenna with a thinš5 mšcable (see attached DS), but I had to solderšSMAšconnector instead of unknown to me.š

The current consumption of the antenna 11Íá @ 3V.š

About 2 minutes after a cold start, the status LED starts blinking 0.5 Hz and 1PPS signal appears at thešClockšoutput connector.š

So, now we can to start work with the self-tuning of the TCXO.š

Anyway, how realistic in the near time to implement an simple command translator through the FTDI - FPGA for the SPI to each LMS to get at least the signals of their synthesizers (also to UART for GPS, to SPI for DAC of TCXO and etc. :).

It can be a simple protocol with virtualšcontrolšregisters addressing and read/write or a few separate firmwares for each goal.š

With such a tool at any time we will be able to check UmTRX operation with some simple signals and an spectrum analyzer.š

Also it will be very helpful for the understanding of how to work with LMS control registers, which is poorly described in the documentation.š

Have any thoughts or suggestions on this?

Andrey Sviyazov.