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HI to all
I own a FY6900 device,
a cheap but very complete generator
(mine is the model working up to 60mHz).
Till now I've used it only with an oscilloscope,
but I would like to employ also with a NanoVNA
Anyone has done so?
I think should be very useful for my tests (i.e.
building filters).
Thanks for any suggestion
73
Gabriele, I4JXE

Hi Gabrielle,

The NanoVNA is a great tool for plotting frequency response and impedance characteristics of a filter and therefore no need to use your signal generator.

Don

No need, the VNA generates its own test signals internally.
73, Don N2VGU

Hi Gabriele,

Be careful with the level output of the FY6900 as it defaults to 5v. This
is well
above what is needed and can damage sensitive instruments such as a tinySA
and nanoVNA port 2.

Phil g3ses

On Fri, 7 Feb 2025 at 21:12, Donald S Brant Jr via groups.io <dsbrantjr=
[email protected]> wrote:

No need, the VNA generates its own test signals internally.
73, Don N2VGU

HI Philip
tnx for the advice. I use a combo of SMA M/F attenuators to stay well under
+10dBm max signal level for NanoVNA input.
Wonder if you too use FY 6XXX generator.
Gabriele, I4JXE



Il Sab 8 Feb 2025, 11:37 Philip Stevens via groups.io <philg3ses=
[email protected]> ha scritto:

Hi Gabriele,

Be careful with the level output of the FY6900 as it defaults to 5v. This
is well
above what is needed and can damage sensitive instruments such as a tinySA
and nanoVNA port 2.

Phil g3ses

On Fri, 7 Feb 2025 at 21:12, Donald S Brant Jr via groups.io <dsbrantjr=
[email protected]> wrote:

No need, the VNA generates its own test signals internally.
73, Don N2VGU

There are quite a number of cheap and useful signal generators offered on
epay.

Dave - W?LEV

<>
Virus-free.www.avg.com
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<#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2>

On Sat, Feb 8, 2025 at 7:03?PM Gabriele I4JXE via groups.io <gbergami=
[email protected]> wrote:

HI Philip
tnx for the advice. I use a combo of SMA M/F attenuators to stay well under
+10dBm max signal level for NanoVNA input.
Wonder if you too use FY 6XXX generator.
Gabriele, I4JXE



Il Sab 8 Feb 2025, 11:37 Philip Stevens via groups.io <philg3ses=
[email protected]> ha scritto:

Hi Gabriele,

Be careful with the level output of the FY6900 as it defaults to 5v. This
is well
above what is needed and can damage sensitive instruments such as a

tinySA

and nanoVNA port 2.

Phil g3ses

On Fri, 7 Feb 2025 at 21:12, Donald S Brant Jr via groups.io <dsbrantjr=
[email protected]> wrote:

No need, the VNA generates its own test signals internally.
73, Don N2VGU

--

*Dave - W?LEV*


--
Dave - W?LEV

Very hard to see what it would do better than the NanoVNA for filters etc

You don’t need the excess power and the output range is pretty limited for harmonic filters etc

TNX for replies
following the First Interest Groups Law:
"At every question will always follow unwanted suggestions"
73

Il Dom 9 Feb 2025, 11:14 Bruce Akhurst via groups.io <bruce=
[email protected]> ha scritto:

Very hard to see what it would do better than the NanoVNA for filters etc

You don’t need the excess power and the output range is pretty limited for
harmonic filters etc

Hi Gabriele,

My signal generator is the FY6800 (60 MHz). I believe the FY6900 is very
similar.

I do not use it with my nanoVNA nor my tinySA. I have checked the output
levels at 10 MHz
using an old commercial RF millivoltmeter which has a 50 ohms input
impedance.
At very low settings the poor screening of the plastic case prohibits its
use in testing
communication receivers.

73 Phil G3SES



On Sun, 9 Feb 2025 at 12:02, Gabriele I4JXE via groups.io <gbergami=
[email protected]> wrote:

TNX for replies
following the First Interest Groups Law:
"At every question will always follow unwanted suggestions"
73

Il Dom 9 Feb 2025, 11:14 Bruce Akhurst via groups.io <bruce=
[email protected]> ha scritto:

Very hard to see what it would do better than the NanoVNA for filters etc

You don’t need the excess power and the output range is pretty limited

for

harmonic filters etc