EMRFD Message Archive 8313
Message Date From Subject 8313 2013-03-06 06:41:53 agustintomasferra... Siglent DSG 1025 as RF generator For simple experiments in RF at around 10 MHz, I could have access to a
SDG 1025 Siglent signal generator. Manual available here
<http://www.siglent.com/en/product/detail3.aspx?id=100000001526838&nodec\
ode=119008003>
I could be even buying it.
What could be missing for it to serve as a proper RF generator?
Somebody suggested to look at the capability to attenuate the output. I
would dare to add, stability, but lacking previous experience I am not
sure what to look at.
No RF generator is available around here so this seem the sole option I
have, if at all.
Comments appreciated.
[Non-text portions of this message have been removed]8314 2013-03-06 07:39:08 Lasse Moell Re: Siglent DSG 1025 as RF generator Looks more like a waveform generator, with max frequency of 25 MHz.
Usually these are pretty handy if you want to create a special waveform
but not the best for
generating sinus signals. I bet it has pretty mediocre phase noise and
it may even have poor jitter.
If you need a signal generator look for one or why not build one of
those based on a Si570.
They do offer plenty for little money!
/Lasse SM5GLC
agustintomasferrari skrev 2013-03-06 01:29:
>
> For simple experiments in RF at around 10 MHz, I could have access to a
> SDG 1025 Siglent signal generator. Manual available here
> http://www.siglent.com/en/product/detail3.aspx?id=100000001526838&nodec\
> ode=119008003
> <http://www.siglent.com/en/product/detail3.aspx?id=100000001526838&nodecode=119008003>>
>
> I could be even buying it.
>
> What could be missing for it to serve as a proper RF generator?
>
> Somebody suggested to look at the capability to attenuate the output. I
> would dare to add, stability, but lacking previous experience I am not
> sure what to look at.
>
> No RF generator is available around here so this seem the sole option I
> have, if at all.
>
> Comments appreciated.
>
> [Non-text portions of this message have been removed]
>
>8315 2013-03-06 12:55:18 Kerry Re: Siglent DSG 1025 as RF generator As Lasse said, a function or waveform generator.
OK if you can borrow/use it but I wouldn't buy it as a signal generator; it's probably not cheap.
You can build a DDS generator; I used this kit;
http://www.minikits.com.au/electronic-kits/dds-synthesizer/complete-dds/AD9851-DDSVFO
to build this;
http://i45.tinypic.com/4h3wcy.jpg
Good signal generators have very good shielding to avoid leakage when working with low signal levels; my generator is built in a simple metal case and I can detect about -80dBm at about 25mm from the front panel.
That's fine for most work if the DUT is half-a-metre or so away from the generator; if I want better I have R & S and HP generators. :)
Attenuation can be provided externally; I use a home-made switched attenuator or a set of rotary attenuators that I put in a case.
Even simpler, if it suits your needs for the present, would be a crystal-controlled oscillator at 10 MHz; a small frequency range can be had by "pulling" the crystal.
An LC oscillator could be made with a variable capacitor; this will drift but your needs may such that drift is acceptable. EMRFD has details of a wide-range generator but a much simpler one may suit your needs.
It does depend on just what your "... simple experiments ..." are.
Kerry VK2TIL.8316 2013-03-06 18:35:00 agustintomasferra... Re: Siglent DSG 1025 as RF generator Thanks for the replies.
I decided to build mine plus an attenuator that looks a necessary complement for what I intend.
Gracias again.