jwsmail at jwsss.com
Sat Apr 29 13:29:06 CDT 2017
On 4/29/2017 10:59 AM, Jon Elson via cctech wrote:
> On 04/29/2017 12:28 PM, Michael Thompson via cctech wrote:
>> The RICM just received $1,000 to buy a new oscilloscope. I would like a
>> four channel. and color would also be nice. The bandwidth doesn't
>> need to
>> be high because we usually work on ancient equipment.
>> What would you suggest?
> Really NEW, or just new for your museum? I got a Tek 2465 on eBay
> that I am quite happy with, for quite a bit less money. There are
> some decent import digital scopes (such as Rigol) that many people
> seem to find good.
> If you are not familiar with digital scopes, there are some gotchas
> there. You can't tell the trigger rate from looking at the screen,
> but then they can see what happened BEFORE the trigger event, and can
> freeze a single-shot event for you to look at. The good Tek DPO
> scopes have not come down enough to meet your price range (yet).
Right now is prime time to evaluate and snag a HP Agilent 16700 with
digital scope channels and logic analyzer channels to boot. You might
be able to snag one along with a new unit. WRT to old equipment the HP
Aglient 16xxx logic analyzers are pretty much the best for every device
I've ever worked on. I don't know that the glut of really nice hardware
will last a long time.
Another thing to consider is the Saleae line of digital probes. There is
a 16 channel unit with analog capture feature now. That unit if you can
capture at a rate that your hardware can handle will capture trace till
you run out of space on the attached pc support device.
If you attach it to a signal that is serial, every channel on the logic
analyzer becomes a serial protocol analyzer, and will export ascii
serial to a file if you are doing that task, as a side benefit.
I'd budget at most 1/4 of your $1000 for that purchase if the donation
i've got the 8 channel unit.
Beware the saleae type units may be 3 v input, be sure to check that, as
my suggestion won't be much use for that case. I've not shopped them
lately, but my older 8 channel unit is 3.3 max only, though I've used it
on 0 - 5 v
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