[Mich VHF UHF Society] Need help with a 2m calibration

[Chuck MacCluer]

Dave:

Thanks for jumping in. I also have a HP432A, but it of course does not read
the levels of interest: -33, -73, and -107 dBm. It does agree with the 0
dBm output of the XG3.

I can also read the XG3 on HF with my various SDRs (where it outputs
correctly), but the issue is on 2m.


73,

Chuck w8mqw

On Mon, Jun 24, 2019 at 9:29 PM David DeVos via MiVUS <mivus at mivus.org>
wrote:

> Hi Chuck,
>
> I measure low levels of power with a HP 432A power meter.  But it will
> measure power down to only -20dBm.  That's useful for low transmit power.
>
> But how about using another receiver to check your signal source?  The S
> meter on my Flex 6500 is supposedly very well calibrated, and it reads out
> directly in dBm.  An empty antenna port on the Flex reads -113 dBm.  That
> would at least verify your signal source.  Problem is, I live in Grand
> Rapids...
>
> If you're not super concerned about accuracy, I'd just use any known good
> receiver to check your signal source.  I attached a typical S meter chart
> to dBm chart I copied from Wikipedia.
>
> Dave DeVos - KF8QL
> Retired guy cell is 616-278-8068
>
>
>
> On Friday, June 21, 2019, 05:18:08 PM EDT, Chuck MacCluer <
> maccluer13 at gmail.com> wrote:
>
>
> Before I take a Teamviewer session from Moscow to diagnose my SunSDR2's
> lack of gain on 2m, I need to verify the output of my Elecraft XG3 signal
> source at 144 MHz.
>
> Does anyone near to me have the equipment to verify the three levels of --
> 107, -- 73, and -- 33 dBm?
>
> I am just east of Lansing and could drive a hour or so to you.
>
> Chuck w8mqw
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