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Part arrival. More ADF7021 Driver work.

A project log for SBHT - VHF DIGITAL RADIO

SBHT is a data/digital voice radio capable of greater than 4 watts of power initially on the VHF Ham bands.

shane-burrellShane Burrell 03/26/2015 at 21:280 Comments

I received the first shipment of parts. Everything seems to fit on the mockup, still waiting for boards. I was concerned on the Laird RF shielding frame as they didn't really seem to have a footprint/datasheet spec for layout but it appears to fit nicely. Another builder received samples for the custom TCXO and there may be a pin change to OSC2 after further inspection of the datasheet. The diagram in the ADF7021 for clocking indicated OSC1 but at CMOS levels it would seem that needs to be on OSC2. Simple fix hopefully. Some more work is done on the ADF7021 driver and the basic config of the IC should be close. There are some calibration routines that will need to be completed.

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