LeCroy 9400A

11.5
11.5.1
40 16 bit
42 8 bit
56 8 bit
82 8 bit
89
8 bit
118-119 16 bit
code = 256 * power
Units: code for power of arbitrary unit
code = 256 * power
Units: identity of arbitrary unit
0 = undefined
1 = dB
4 = degrees
Display Type:
0 = dBm Power Spectrum
1 = dBm Power Density
2 = Magnitude
3 = Phase
4 = Real Part
5
= Imaginary Part
Window Type:
0
= rectangular
I =von Hann
2 = Hamming
3 = Flat Top
4 = Blackman-Harris
Zero Suppression:
0 = OFF
1 = ON
Ratio of the number of data points of the
expanded waveform over the number of data
points computed.
FFT Application Hints
Some practical suggestions:
(I)
To increase the frequency resolution, increase the length of the
time domain waveform record (i.e. use a slower time base).
(2) To increase the frequency range, increase the effective sampling
frequency (i.e. increase the Transform Size).
ii-II
Fast Fourier Waveform Processing
Option (WP02, V 2.06FT)