User`s guide

34410A/11A/L4411A User’s Guide 111
Measurement Tutorial 4
The following table shows the typical error for various pulse waveforms as a
function of input pulse frequency:
This table gives an additional error for each waveform, to be added to the
value from the accuracy table provided in Chapter 5, “Specfications.”
The 34410A/11A/L4411A specifications are valid for CF ≤
10, provided there
is insignificant signal energy above the 300 kHz bandwidth for voltage, or
the 10 kHz bandwidth for current. Multimeter performance is not specified
for CF > 10, or when significant out-of-band signal content is present.
Example:
A pulse train with level 1 V
rms
, is measured on the 1 V range. It has pulse
heights of 3 V (that is, a Crest Factor of 3) and duration 111 μs. The prf can be
calculated to be 1000 Hz, as follows:
Thus, from the table above, this ac waveform can be measured with 0.18
percent additional error.
Typical error for square wave, triangular wave, and pulse trains of CF=3, 5, or 10
prf square wave triangle wave CF=3 CF=5 CF=10
200
–0.02% 0.00% –0.04% –0.09% –0.34%
1000
–0.07% 0.00% –0.18% –0.44% –1.71%
2000
–0.14% 0.00% –0.34% –0.88% –3.52%
5000
–0.34% 0.00% –0.84% –2.29% –8.34%
10000
–0.68% 0.00% –1.75% –4.94% –26.00%
20000
–1.28% 0.00% –3.07% –8.20% –45.70%
50000
–3.41% –0.04% –6.75% –32.0% –65.30%
100000
–5.10% –0.12% –21.8% –50.6% –75.40%
UG_ED5.book Page 111 Thursday, March 1, 2012 11:28 AM