Scope Adapter for Apple Devices

HollyMinkowski

Interesting 5mhz scope adapter for iPhone/iPad.
But 298.00 for a 5MHz scope adapter? It also has
4 channels of digital input. This thing looks cool but
it's overpriced IMO.

Better to get a cheap Rigol DS1052E for about 350.00

The 5MHz bandwidth puzzles me? What sort of cheap and slow uC is this thing
based on anyway. I'd think a cheap Prop could just about handle a 5 MHz
bandwidth. Why didn't they just use a 600MHz or faster ARM and get better
quality.

http://www.saelig.com/product/PSHA027.htm


Apple stuff is good but it's iHyped and iPricey

Mike Green

Sure, it's overpriced. That's what happens when you're the first on the market (a relatively small market) with something with extra "hoops" to jump through, both in terms of software development and hardware design (to get that "Made for iPad" label) so it "just works" (as Steve Jobs recently said in another context). Indeed, Apple stuff is pricey and often over-hyped, but there's usually a tremendous amount of thought behind it. You may disagree with the conclusions reached and sometimes they screw up, but it's not for lack of effort.

Leon

A 5 MHz input needs to be sampled at >15 MHz, ideally. Can a Propeller handle that?

5 MHz isn't much use, anyway, it won't handle square waves at more than about 1.8 MHz. I use an old Tek 100 MHz scope.

RDL2004

Sorry to go off topic, but since you mentioned it, look what the UPS guy dropped off about 2 hrs ago...

edit: @Holly

It's a DS1052E - here's another pic.

(I didn't want to add another off topic post)

HollyMinkowski

Cool!
What model Rigol is it?

Zoot

I'd have to echo Mike's comments, but it's also a bit of an invalid comparison. Will my $300-$800 'scope show me PDFs? Let me browse forums or tech documentation online? Let me compile and burn firmware to my microcontrollers? The idea of having a space-saving, portable single device in the shop to do all this is pretty cool. Also, it appears that Oscium really leveraged the touch and gesture capabilities of the tablet as the UI for the 'scope, which I think is very clever and elegant.

If I could get something similar for my Android phone, I'd probably do it sooner rather than later.

HollyMinkowski

Zoot

Yes, I can see the qualities of such a thing, it's the limited 5MHz spec
that bugs me....given the price of the thing...plus why not 2 analog chans??

jazzed

Leon wrote: »

A 5 MHz input needs to be sampled at >15 MHz, ideally. Can a Propeller handle that?

5 MHz isn't much use, anyway, it won't handle square waves at more than about 1.8 MHz. I use an old Tek 100 MHz scope.

A 100MHz Propeller can sample 30 pins at .... well, 100MHz. The sample size is limited to about 450 longs though. Larger sample sizes can be had at 6.25MHz or higher depending on the code. I recommend this 100MHz PPLA for Propeller enthusiasts: http://www.wulfden.org/TheShoppe/prop/ppla/index.shtml

Leon

That's not a scope, though.

jazzed

Leon wrote: »

That's not a scope, though.

True. A 14 channel scope is possible with today's Propeller, but the sample rate is limited to 2.5MHz or less per channel at different bit resolutions.

Kevin Wood

@RDL2004 - So you have no furniture, but you do have a digital scope....

It's good to be da king!

Leon

What I meant was, is it fast enough to process the samples and display them?

HollyMinkowski

RDL2004

Those are good scopes!

I like them because they are cheap and you don't have to worry
as much about them (I'm rough on scopes...bad scope karma I guess)

I'd be scared to touch a decent 5000.00 dollar scope...it would go poof.

Peter KG6LSE

Its about time ! This is exactly what i wanted !!!!!!!!

kwinn

HollyMinkowski wrote: »

RDL2004

Those are good scopes!

I like them because they are cheap and you don't have to worry
as much about them (I'm rough on scopes...bad scope karma I guess)

I'd be scared to touch a decent 5000.00 dollar scope...it would go poof.

Holly, I lugged a Tektronics 465 scope around (and not always gently either) for more years than I care to remember and never had a problem with the electronics or crt. The plastic cover for the face was replaced several times, also the feet, and the power cord. It got so much use the aluminum case even came apart where the carrying handle attached to it. I finally got rid of it a couple of years back, not because of the electronics or the crt, but because the tiny little leaf spring contacts they used to switch ranges and such had no spring left in them. Those scopes were amazing. Forget bad Karma, get a Tek.

Ale

I also ended up getting a Rigol 1000 but the C series. It samples up to 400 MS/s on 1 channel or 2x250MS/s on two channels. I'd love it more if it were not that loud . Btw, the plastic knobs broke, they are still attached but have a fissure on one side, most of them . I'm happy with it but would love something a bit better with more BW. Every time I get the money... it slips away like water .