Kit Demo for METRIX Oscilloscopes
31
1. Using the SG1025 generator to demonstrate the advantages of the
"LongMem" memory depth
and of the Digital Filters
a) Influence of memory depth (LongMem or Normal) on the sampling interval:
The sampling rate of the DOX2040-DOX2100 oscilloscopes for the time base position
M = 250µs/div-
for example- is
50MSPS
with a Memory Depth = «
LongMem
» and
2.5MSPS.
If the Memory
Depth = "
Normal
", the minimum observable interval in DOTs will therefore be, in this case, 20ns when
"LongMem" is active and 400ns in "Normal" mode.
To see the effect of the "
LongMem
" function during a fine analysis of a signal, we are going to observe, in
"
Delayed
" mode, a
sinusoidal signal having a frequency of 10 MHz
in DOTs display mode and
Vectors
with a main time base of
M = 250µs/div
and a Delayed time base of
W = 25ns/div
(there is a ratio of
10000
between the
M
and
W
time bases):
When the LongMem function is activated, the 10 MHz sinusoidal signal is perfectly observable with the
Delayed time base and a Zoom factor of 10000, because the 20ns sampling interval is shorter than the 50ns
half-period of the sinusoidal signal
Содержание DOX 2 Series
Страница 1: ...X04128A02 Ed 1 09 15 Demonstration SET for METRIX DOX 2xxx Oscilloscopes User s guide...
Страница 9: ...Kit Demo for METRIX Oscilloscopes 7 FFT of the signal on channel CH2...
Страница 16: ...14 Kit Demo for METRIX Oscilloscopes Zoom by 1000 in LongMem mode...
Страница 27: ...Kit Demo for METRIX Oscilloscopes 25...
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Страница 48: ...46 Kit Demo for METRIX Oscilloscopes Remark the 70 kHz and 90 kHz components have the same amplitude...
