3000T Datasheet, PDF (5/40 Pages) Keysight Technologies – InfiniiVision 3000T X-Series Oscilloscopes

05 | Keysight | InfiniiVision 3000T X-Series Oscilloscopes - Data Sheet
Discover: The Industry’s Fastest Uncompromised Update Rate Increases the
Chance of Finding Anomalies (Continued)
But all specs aren’t equal.
Many vendors claim an update rate specification, but that is only in a special mode, or
without any features turned on. Table 1 shows the 3000T X-Series’ update rate versus a
competing oscilloscope.
While all scopes update rate will vary to some degree by the timebase setting, it is
critical that the update rate remain constant regardless of the functionality you are using
within the oscilloscope.
Table 1. Measured update rate between the 3000T X-Series and the
Danaher Tektronix MDO3000. Note how the update rate fluctuates
wildly on the MDO3000 based on different settings/features.
Max with no features on
Max with digital ch on
Max with measurements on
Max with FFT on
Max with serial on
Max with search on
Max with ref wfms on
10 ns/div
Keysight 3000T X-Series
Update rate Probability
1,114,000
94%
1,101,000
94%
1,114,000
94%
1,114,000
94%
1,100,000
94%
1,113,000
94%
1,113,000
94%
Tektronix MDO3000 Series
Update rate Probability
281,000
50%
132
0.03%
2,200
0.55%
2,200
0.55%
1,800
0.45%
2,200
0.55%
2,200
0.55%
Why is an uncompromised update rate important?
When debugging or troubleshooting a project, it is important that you see as much signal
detail as possible. A fast update rate is just part of the overall equation to determine the
likelihood of seeing an anomaly. The frequency of the anomaly, the timebase setting of
the oscilloscope and the amount of time you allow the oscilloscope to see the anomaly
all come in to play:
P_t = 100 x (1-[1-RW]^{(U x t)})
where
P_t =
t=
U=
R=
W=
Probability of capturing anomaly in “t” seconds
Observation time
Scope’s measured waveform update rate
Anomalous event occurance rate
Display acquisition window = Timebase setting x 10
Therefore, it is important to select an oscilloscope with the fastest uncompromised
update rate to allow enough time to increase your chances of seeing the glitch. In Table
1, in addition to the measured update rate, we show the probability of seeing a glitch
that happens 5 times a second while allowing the oscilloscope to acquire for 5 seconds.
With the 3000T X-Series you maximize your chances of seeing the infrequent glitch.
With the competing scope, if you are using any of the other features like measurements,
or search or digital channels, the update rate slows considerably. The only option you
have in this case is to allow the oscilloscope to run longer. For example, if you are using
digital channels you’ll have to let the scope run over 8,000 times longer to get a similar
probability to the uncompromised update rate of the 3000T X-Series. That’s almost 12
hours of time versus 5 seconds!