LeCroy 9410 - Page 80

System Commands
I
I
QUERY SYNTAX
Response Format
EXAMPLE (GPIB)
<source_expr> := <source> {+, -} <addend>
<source_expr> := <source>
<multiplier> := 0.001e-33 to 999.999e33
<addend> := -999.999e33 to 999,999e33
<source> := {EA, EB, MC, MD, FE, FF, C1, C2, C3,, C4,}
<window_type> := {RECT, HANN, HAMM, FLTP, BLHA}
<off_on> := {OFF, ON}
<max_points> :=
9410114 All others
50 to 10000 50 to 50000
Note: The source wave form must be a time domain signal.
<function>: DEFine?
<function>:DEFine EQN,’<equation>’,MAXPTS,<max_points>,
WINDOW,<window_type>, DCSUP,<off_on>
The following command defines Function E to compute the Power
Spectrum of the FFT of Channel 1. Prior to FFT computation,
Channel 1 is multiplied by 1.018 and 0.055 (units of Channel 1,
i.e. Volts) is added. A maximum of 1000 points will be used for
the input. The window function is Rectangular. The DC compo-
nent of the input is not suppressed.
CMD$="FE:DEF EQN,’PS(FFT(1.018*C1 + 0.055))’,
MAXPTS, 1000,WINDOW,RECT,DCSUP,OFF"
CALL IBWRT(SCOPE%,CMD$)
I
I
I
I
I
I
I
I
I
COMMAND SYNTAX
(FFT Power Average)
:~ 4-channel oscilloscopes only
74
< function > :DEFine EQN,’ < equation > ’,
SWEEPS, < max_sweeps >
<equation> := MAG(AVGP(<source>))
<equation> := PS (AVGP(<source>))
<equation> := PSD(AVGP(<source>))
<source> := {MC:I:, MD~:, FE, FF}
<max_sweeps> := 1 to 50000
Note: The source waveform must be another function defined as a
Fourier transform.
I
I
I
I
I
i
I