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Thread: Autotuning Your Converted PM1500

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    Default Autotuning Your Converted PM1500

    If you have a PM1500 that is now an XTL, you will have a problem at one power point when you autotune. For some reason, and I suspect an early production run, one tuning point at the edge of the band will fail the power output test.

    If the radio passes all other points, the failed point will be down slightly, like 80-90 watts instead of 110. I have done several of these and this appears to be consistent with the older boards. The same radios with a new depot fresh board align correctly.
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    Autotuning with Aeroflex or Freedom? Two different AutoTune methods known for producing two different results depending on machine.

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    I have an R8000 and a 3920. They produce similar results, although there is no current adjust for the R8000. I still think that it is probably old spec caps. I setup both machines to the same test specs.
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    Quote Originally Posted by com501 View Post
    I have an R8000 and a 3920. They produce similar results, although there is no current adjust for the R8000. I still think that it is probably old spec caps. I setup both machines to the same test specs.
    I believe this to be the case as well but it's a literal pissing match between the two companies (and some customers) about who's machine is better. I know the original General Dynamics AutoTune defaults are typically +/- 10% even if the results are still within Motorola's specs. I have my preferences...which do not include anything Aeroflex makes because I find them hard to navigate...but it doesn't mean I'm limited to the R8000/R8100's either. Still astounds some at the shop that I insist on dragging my personal R2670 in occasionally when I have a perfectly good R8000 sitting on my bench. There are just some things for testing P25 that the R2670 does better and/or more easily (but then again, I think the R8000 does trunking better).