On 08/01/2014 11:24 AM, Nathan McCorkle wrote:
I've got a DS1074Z-S... I was disappointed that the sig-gen couldn't
make a 25MHz square wave, though it could make a sine wave up to 25MHz
that looked good. With all the channels on and a sig-gen running, the
control response get's a little slow, but it isn't unusable by any
means, and not too annoying. It would be more annoying if I was using
it for business where I spent hours with it each day, but I seem to
use it in spurts so it is REALLY quite nice for that. It has decent
save-to-usb function, though I seem to remember it having trouble with
an 8 or 16GB USB flash drive. An older/cheaper/smaller flash drive has
no problems. It comes with ethernet too, which I've not really used,
but there were some folks developing custom Windows software (I don't
think the source was open, though I remember it was based on some
National Instruments core packages... I also remember thinking the
open-source libvisa might be able to hook up to the scope). There are
also some hacks you can do, for things like zooming in further than
bit-depth has resolution for (aka digital zoom), and also for more
controversial modifications.
I'm quite happy with it, though I was QUITE bummed out the day I was
trying to generate faster and faster square waves to test some
relatively high-speed digital stuff (I was starting from 1MHz and when
the protocol seemed to work, I was planning to increase freq until the
max 25MHz I thought it could drive... until the wavegen freq for
square maxed out)
Stand alone DDS function generators also tend to have these same
limitations. :-(
I can confirm the Siglent SDG5082, which is rated for 80 MHz with sine
waves, only goes up to 30 MHz for square waves.
On Thu, Jul 31, 2014 at 2:20 PM, Sova <[email protected]> wrote:
Hey guys,
I’m looking at getting a scope to setup a basic test bench at my place.
Mainly I’ll be using it to repair amateur radios, amplifiers, and maybe some
debugging of digital circuits later.
There is a guy on CL that is offering me an older Tektronix 2252 100Mhz
analog scope with digital storage and integrated volt-meter for $350. He
can’t vouch for its calibration.
Alternatively, I’m looking at the Rigol DS1102E which is the same price. It
is a Chinese made LCD based digital scope that is much smaller and portable
and seems to have good reviews. It is 1GSa/sec, rated 100MHz with a million
point storage.
Which do you think is the better investment? I know that the Tek is a high
quality device but it is over 20 years old and probably impossible to fix if
something breaks in it. The Rigol is new but probably not well made but the
portability and desk space I’d save seems like a real plus. I’m worried
that it won’t be high enough resolution for doing the radio repairs but most
IF frequencies in radios are around 465KHz so it might be fine.
Or, maybe one of you guys has an older scope you want to sell?
Sova
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