[time-nuts] No 1 PPS output on a Tbolt
Bob Camp
lists at cq.nu
Fri Feb 12 19:34:54 UTC 2010
Hi
I went with a used Tek TDS-380. I still live in a fantasy world where it's not a scope if it doesn't say Tek on it :)....
For a 15 year old scope the one I found seems to have pretty good performance. I've used them enough at work that I knew anything much under 300 MHz and 2 GS/s would drive me nuts. I must admit that my poor aching back put in a vote for one of the cute little LCD based scopes. Combining the LCD with the samples and bandwidth simply was way outside the budget. The debate went on for a month though .....
So far no complaints, but I'm not dumping any of the analog scopes quite yet.
Bob
On Feb 12, 2010, at 11:46 AM, Brooke Clarke wrote:
> Hi Bob:
>
> I have been studying digital scopes for some time and have the Rigol DS1052E on the way.
> http://www.prc68.com/I/RigolDS1052E.shtml
> Rigol may make the low end scopes that are sold by Agilent. This model goes for a little over $400 and gets excellent reviews (links on the above web page).
>
> Have Fun,
>
> Brooke Clarke
> http://www.PRC68.com
>
>
> Bob Camp wrote:
>> Hi
>>
>> Of course the other option is to *finally* break down and buy a digital scope. They've been out there for> 20 years now.
>>
>> Yes, I did indeed cross over to the dark side last week....
>>
>> Bob
>>
>> On Feb 12, 2010, at 7:24 AM, Peter Vince wrote:
>>
>>
>>> Hi Robert,
>>>
>>> I put a dual-colour (red-green) LED in a BNC plug for just this
>>> sort of purpose. No series resistor - the 50-ohm source impedance
>>> limits the current nicely. With dual-colour, I can see both positive
>>> and negative pulses. 100ms pulses are perfect, 10ms OK, 1ms are very
>>> dim, but there is no chance of seeing the 10us pulses from the
>>> Thunderbolt.
>>>
>>> As others have said, I set the (analogue Tek 2445) 'scope to
>>> 10us/div, 2 volt/div, 50 ohms, DC positive edge trigger, and waggle
>>> the trigger level. The display is dim, but visible. A slightly
>>> slower scan would narrow and brighten the pulse on a tired tube.
>>>
>>> TTFN,
>>>
>>> Peter
>>>
>>>
>>> On 8 February 2010 15:15, Robert Darlington<rdarlington at gmail.com> wrote:
>>>
>>>> Try hooking the output to an LED. It's very difficult for me to see the
>>>> pulse on my analog scopes but there is no arguing with the blinking light.
>>>>
>>>> -Bob
>>>>
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>>
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>
>
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