[time-nuts] Leakage, tinySA

[Bill Notfaded]

Knock offs is part of the reason I posted the main US distributer earlier.
The software is basically open source so anyone could theoretically make
one.  There's only one original manufacturer though.  R&L Electronics is
the only sanctioned US distributer I'm aware of.  Also they have the best
price in US you can find for obvious reasons.  FWIW I don't have spurs at
10MHz.

Bill in AZ

On Sun, Jan 17, 2021, 5:35 PM Dana Whitlow <k8yumdoober at gmail.com> wrote:

> Hi Dan,
>
> I remember seeing the list of checks to make regarding knockoff clones,
> and even remember a few of them: to wit:
>
> 1. Comes in molded packaging, not poly foam.  Check!
> 2. Has the internal shielding.  Check!
> 3. Passes all the self tests, including 7 & 8.  Check!
>
> I had high hopes of moving the birdie off 10 MHz by changing the IF
> frequency
> setting, but this did no good.  I'd sure like to see a detailed block
> diagram, but
> do not know where to look.
>
> I also tried turning on the "spur eliminator", which did help by several
> dB, but
> my birdie still sits a few dB able the displayed noise floor in the
> narrowest
> available resolution BW of ~ 3 kHz.
>
> So, for the moment, I'm out of ideas.
>
> Thanks,
>
> Dana
>
>
> On Sun, Jan 17, 2021 at 5:21 PM Dan Kemppainen <dan at irtelemetrics.com>
> wrote:
>
> > Dana,
> >
> > Just an FYI. Apparently, there are knockoff clone copies of the TinySA
> > out there. (Yes, making a knockoff clone of a $50 spectrum analyzer is a
> > thing, go figure!)
> >
> > Apparently, these have substandard performance, and a host of
> > issues/concerns. I ran into this on the TinySA web site. They have some
> > hints on how to detect if you have a clone or not. Might be worth
> > looking into to see if you have a sub-par copy.
> >
> > Dan
> >
> >
> >
> >
> > On 1/16/2021 12:00 PM, time-nuts-request at lists.febo.com wrote:
> > > Date: Sat, 16 Jan 2021 05:45:19 -0600
> > > From: Dana Whitlow<k8yumdoober at gmail.com>
> > > To: Discussion of precise time and frequency measurement
> > >       <time-nuts at lists.febo.com>
> > > Subject: Re: [time-nuts] Leakage, tinySA
> > > Message-ID:
> > >       <CADHrwpd2B=p=
> > qRJLG-Bw68WGDAhmLHE9QULPuPijUqeDApzGcw at mail.gmail.com>
> > > Content-Type: text/plain; charset="UTF-8"
> > >
> > > Another data point:  My newly-received TinySA has a big birdie at 10
> MHz,
> > > which is a
> > > disappointment since I had hoped to use the unit as a sniffer to track
> > down
> > > leaks in my
> > > 10 MHz distribution system.  This birdie in the TinySA persists even
> when
> > > nothing is
> > > connected to the input and does not vary in amplitude when I move
> around
> > > the house,
> > > or with time while I'm sitting still with the unit.
> > >
> > > I, too, received no manual.
> > >
> > > Dana
> >
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