HP 3562A Operating Manual page 237

t-Hf::.UUENCY Ri::. S PQNSE SYNTHESIS
Converting Synthesis Tables
Synthesis tables can be converted from the current type to one of the other two types using the
CONVRT T ABLE menu. To convert a synthesis table, press the CONVRT TABLE softkey to
display the following menu:
. Also, pole/zero tables can be converted to curve fit tables using the 8 YNTH-
the FIT FCTN
convert a pole/residue or polynomial table to curve fit, first convert it to pole/zero format When
converting tables containing large numbers, it is recommended that you scale the numbers
down using SCALE FREQ.
Synthesis Formulas
The following formulas are used in synthesis (remember that S is in Hertz in all these):
Pole-zero format:
Pole-residue format:
Polynomial format:
(can be complex if synthesizing; m ust be real for table conversion)
9-22
Chapter 9-Data Operations
TO-> POL
Converts a pole/residue or polynomial table to pole/zero
ZERO
format
TO-- POL
Converts a pole/zero or polynomial table to pole/residue
RESIDU
format
TO
Converts a pole/zero or pole/residue table to polynomial
-- POLY
format
RETURN
Redisplays the
m enu under CURVE FIT -·-see "Using the Curve Fitter" later in this chapter To
K(S - S, )(S - S, ' )( 8 - S 2 ) '"
(gai n
.. ..- -" "
factor)
(S - S3 )(S - S/ )(S - S 4 ) '"
A,
SO
+ ,
C o C S' +
,
+ S S
'-J: -
". -
(residual terms)
K(a, sO + a 2 s' + a3 s 2 + " . )
(b, sO + b 2 s' + b3 s 2 + " . )
SYNTH menu .
'
(non-zero case)
A2 A 2 '
+ + +
S '
(S - S 2 ) 2
S S
- 2 S- 2
-
"-
(non-zero case)
> key in
FIT soft
A3
+ .
""
(repeated
poles case)