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Re: Calibrated now no receive.. Ubitx V6


 

I'm glad to hear you're up and running again! I'm a little confused by the "Locosc from your setting of 110553300" statement, since that number looks more like a BFO calibration number than a local oscillator, but it doesn't matter too much as long as you're on frequency now.

My cal:
Local oscillator: 138,850
BFO: 11,055,300

Your cal (as written):
Local oscillator: 178,000,000
BFO: 11,055,300

A brief explanation:
The local oscillator calibration corrects for any error in your specific frequency generator chip and it's crystal. It determines if your system frequencies match the display frequencies.
The BFO frequency calibration it's specific to your radio's BFO crystal filter, and ensures that the right side band signal gets through the filter, and is passed to the audio stages.

With that in mind, the difference in our values can be explained by us having similarly tuned BFO filters, but your radio having a larger discrepancy between actual frequency generation and expected frequency generation. Based on your local oscillator cal value, it seems like your local oscillator reference may be running closer to 30MHz than the 25MHz the code expects. Nothing wrong with that if it's true.


Reed

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