On Thu, 19 May 2005 20:15:16 -0400, chuck wrote:

From one Chuck to another,

Thanks for the info and the advice! I will definitely look
further into the '13 and '14.

I do understand the need to sweep "slowly" at narrow RBWs.
But I'm still troubled by the fact that the *slowest* sweep
built into the 7L12 is 10 msec/division! That will,
arguendo, degrade the filter response. The storage scope
will surely not sweep the SA at a slower rate, and putting a
distorted SA output signal into a storage scope can't
possibly reshape the response! So there is no cure. If our
assumptions are correct, this is a fatal Tek design flaw
(not a whole lot of them around).

A storage scope would be really important if the SA is
sweeping too slowly for the regular scope's persistence, or
to capture a single-sweep trace. Or for simply storing a
trace for later viewing. But if the sweep rate is 10
sweeps/second, there shouldn't be much flicker with P31.

Something is amiss here, I think. Maybe there is a typo in
Tek's spec sheet? Or more likely, a parity bit error in my cpu!

Chuck








I just looked at the 141t and it takes 2ms/div for no flicker. This is
at wide bandwidth.

At 2khz/div spectrum width and 300 hz bandwidth it takes 50ms/div
sweep speed max. At 5 khz spectrum width it takes .1 sec/div sweep
speed.

At 100hz bandwidth and 2khz/div spectrum width it takes .5sec/div
sweep speed.
Definitely storage scope area!

The 50ms/div sweep can be viewed without storage on a p31 but it is
not good.

73
Gary K4FMX