JMini wrote:
> On 6/22/2008 2:52:30 PM, instantwow wrote:
>> I recently purchased an oscilloscope on Ebay. It is a 100Mhz model. I
>> was configuring the scope using the calibration output, which is a
>> 1Khz 2 volt square wave. The horizontal line drawing on the scope
>> looks good, however, the vertical trace ****tion on this wave is barely
>> visible at the highest brightness setting. Is the normal, or is there
>> a problem with the scope? Is this common with analog scopes? This is
>> my first oscilloscope, so I’m not sure. Here’s a photo I took. Any
>> ideas?
>>
>> http://www.flickr.com/photos/27262651@[EMAIL
PROTECTED]
>> Thanks.
>>
> It's just making the transition from 0V to 2V almost instantaneously
(high
> slew rate). Leaving little time for the phosphor on the screen to
respond. It
> looks like it's responding well.
That part has always bothered me. I have a 1990 vintage 4 channel,
100MHz, 2245 with only about 40 hours of use after 18 years, and it has
the same square wave. Having a 1KHz and a 1MHz calibration would have
been appreciated so the rise time could be checked for overshoot and
proper probe calibration for higher frequencies.
That part aside, it works like a dream since 99% of my needs are below
100MHz. It was bought for me by a company I was consulting for so I
could do more work at home and not have to be physically in their
building, but I had to pay 'income' tax on it.
I would still like to get an older 547 since that had the sharpest
display of any scope, ever.
Bill Baka
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