Re: Tek 2215A


On 4/10/2014 9:37 PM, Ali Santoso wrote:
Hi Chris, David,

thanks for you guide, last night i try david suggestion on how the switch
and mode but i still can't get stable waveform

here is the link of the switch and mode that i made.
it is correct?


Your trigger on the Rigol is in AUTO in the picture at the
link you gave. You DO NOT want it in AUTO on the Tek 2215.


On Thu, Apr 10, 2014 at 7:30 PM, David <@DWH> wrote:

> The only difference between NORM and P-P AUTO on the 2215A and most
> other
> Tektronix oscilloscopes is that P-P AUTO mode sets the trigger level
> to
> the peak to peak signal range and if no valid trigger occurs within the
> timeout
> period, the sweep will be started anyway.
> The other trigger controls including the holdoff oddly enough work the
> same way
> in both modes.
> There is no reason not to use AUTO or P-P AUTO routinely. Setting the
> trigger
> level range to the peaks of the signal is particularly handy and one
> someone might use the single timebase plug-ins instead of the dual
> plug-ins in the 7000 series because the former support P-P AUTO while the
> later
> do not. P-P AUTO mode with the level control set mid-range should trigger
> on
> anything and will always display at least a baseline trace. NORM mode may
> or
> may not trigger depending on the signal levels and coupling.
> On Thu, 10 Apr 2014 04:39:03 -0700 (PDT), you wrote:
> >Auto-trigger does not automagically make a stable trace. It's up to
> you. Auto-trigger basically says, you don't have the controls set right.
> The scope didn't find a valid trigger signal in the time it takes to get
> across the screen, so the scope will trigger the scope. I think level and
> slope controls work in auto-trigger as well.

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