Re: bandwidth ? is 100MHz scope really 100 MHz ?
- From: "Steve" <zarco@xxxxxxxxx>
- Date: Tue, 30 Oct 2007 06:38:17 -0800
Most scopes I've seen specify 'usable' bandwidth based on the
response of the vertical amps. If its a 100 MHz scope, the
respose of the amp will be down 3 dB or less at 100 MHz.
In other words, you'll be able to see a signal, but the accuracy
(vert) is poor.
Steve
"robb" <some@xxxxxxxxxxxx> wrote in message
news:13iefdd1h8p3l78@xxxxxxxxxxxxxxxxxxxxx
when an oscope is advertised as 100 MHz scope what exactly is
the useable bandwidth ?
my 100Mhz scope only has Horizontal divisions down to .05 usec
which means 5 x 100 MHz periods squashed into a division, yes ?
(since 100 MHz = .01 usec period) is that considered a useful
display of 100MHz signal ?
probably i am missing something or maybe 100 MHz just means you
can see it but really only usefull up to 50 Mhz ?
do they intend you can detect and see 100 Mhz wave i would
anticipate that 100 MHz scope means the best you can view is one
100 MHz period across the scope screen.
so in my case 10 divisions so ( .01 usec / 10 div) = .001 usec
per division which i do not seem to have
what am i missing ?
thanks for any help,
robb
.
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