Agilent Technologies E5100A, Programming Manual, Page: 295 / 373

9. Assumes that the frequency at which the phase becomes 0
*
near the series
resonance frequency is f
r
.
10. Calculates the constants using the above values and the following
equations:
Q
s
=
f
s
f
2
0 f
1
L
1
=
Q
s
!
s
G
max
C
1
=
G
max
!
s
Q
s
C
0
=
B
f s
!
s
C
0
0
=
B
1
+ B
2
2 !
s
R
1
=
C
0
0
C
0
G
max
R
0
=
1
G
max
0 R
1
G
0
= G
a
0
R
1
!
a
2
C
0
2
1 + R
0
R
1
!
a
2
C
0
2
* ``EQUCP ARA?'' in terp olates the 0 phase p oin ts ev en if it do es not exist in measured data.
If the number of points between the maximum peak point (f
Bmax
) and
the minimum peak point (f
Bmin
) of the conductance is less than 10 points ,
EQUCPARA? approximates an admittance circle . The circle approximation can
be performed if there are 3 points for analysis . Y ou can specify how many
points are used for circle approximation using the EQUM command to reduce the
analysis time .
If EQUCPARA? fails the circle approximation, 0 will be return for all parameters .
If there are only 2 points for analysis , EQUCPARA? returns four-device equivalent
circuit parameters . In this case , EQUCPARA? returns 0 for G
0
and R
0
.
If there is only 1 point for analysis , EQUCPARA? returns 0 for all parameters .
EQUM
value
Species how many points are used for an approximation of a circle with the
EQUCPARA? and EQUCPARS? commands . EQUCPARA? (or EQUCPARS? ) thins the
measured points out for the specied points , then makes a circle approximation.
When the EQUM parameter is set greater than the number of points , EQUCPARA?
uses all the points for the circle approximation. Default value is 8.
value 2 to 801
Note Y ou must select the following conditions or P olar format to use this command:
Dual Channel & Coupled Channel: ON
Impedance Conversion: ON
Analysis channel: LOG MA G format
Non-analysis channel: Phase format
If another format is selected, 0 will be returned for query response .
Examples
10 ASSIGN @E5100 TO 717
20 OUTPUT @E5100;"FMT POLA; CONV YTRA; CENT 60.06MHz; SPAN 20kHz"
30 CALL Sweep(1) ! Goes to sub routine. (See OUTPFILT?)
40 OUTPUT @E5100;"ANAOCH1;ANARFULL;ANAODATA"
50 OUTPUT @E5100;"EQUCPARA?"
60 ENTER @E5100;C0,C1,L1,R1,G0,R0
70 PRINT "C0:";C0;" C1:";C1
80 PRINT "L1:";L1;" R1:";R1
90 PRINT "G0:";G0;" R0:";R0
100 END
Waveform Analysis Commands D-45