8313	2013-03-06 06:41:53	agustintomasferra...	Siglent DSG 1025 as RF generator
Message	Date	From	Subject
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.