HP 3562A Operating Manual page 233

Chapter 9-Data Operations
FREQUENCY RESPONSE SYNTHESIS
FREQUENCY RESPONSE SYNTHESIS
This feature synthesizes frequency response curves from pole/zero, pole/residue or polynomial
data. The syn thesis tabl e can contain up to 22 l ines of pol es and zeros. If all entries are com­
pl ex, up to 44 pol es and 44 zeros can be used. (Conjugate pairs are considered two val ues. )
Cons tants can al so be synthesized for use in waveform math. The current synthesis tabl e is
saved in nonvol atile memory inside the instrument and is not erased when power is removed.
(Tabl es can also be stored in disc memory; see Chapter 11 for instructions) .
Synthesized traces match the mode in which they are created. For exampl e, i f the H P 3562A is
in the l inear resol ution mode, the synthesized trace con tains 801 l ines. The frequency span of
synthesized traces i s set using the FREQ menu. (I f demod is active, the pre-demod span is
used.) The Laplace operator S is normal ized in Hertz.
This section contain s the foll owing topics:
For an example of syn thesizing a frequency response trace, pl ease refer to the User's Guide at
the beginning of this manual.
Pressing SYNTH displ ays the foll owing menu:
9-18
1 . Using the
SYNTH menu: sel ecting the type of syn thesis, creating the traces and
creating constants.
2. Adding to and editing the synthesis tabl e.
3. Using the SYNTH FCTN menu for gain, del ay and frequency scaling.
4. Converting tabl es to other syn thesis types and transferring them to curve fit.
POLE
Selects pole/zero synthesis and displays the table and its
ZERO
editing menu; see "The Synthesis Table. "
POLE
Selects pole/residue synthesis and displays the table and
RESIDU
its editing menu; see "The Synthesis Table. "
POLY­
Selects polynomiaJ synthesis and displays the table and
NOMIAL
its editing menu; see "The Synthesis Table."
CONVRT
Displays the convert tables menu; see "Converting Syn­
TABLE
thesis Tables."
CREATE
Creates real or complex constants for use in waveform
CONST
math. Real values are entered as a single number; com­
plex values are entered as real, imaginary separated by a
comma (,). As an example, 6
CREATE
Creates a frequency response curve based on the current
TRACE
synthesis table. The message "Synthesis in Progress" is
displayed while the trace is being created, and the trace is
displayed when synthesis is complete.
±
j3 is entered as 6,3.