312 Chapter 16
GPIB Command Reference
EQUCPARS4?
EQUCPARS4?
Syntax EQUCPARS4?
Description If the sweep parameter is frequency and the measurement parameter is |Z|-θ, within the
waveform analysis range specified with the
“ANARANG” command on page 267,
analyzes the 4-device equivalent circuit parameters of a crystal oscillator (refer to Figure
16-1) using the admittance characteristic circle diagram (refer to Figure 16-2), and reads
out them. If the sweep parameter is not frequency or the measurement parameter is not
|Z|-θ, executing this command causes an error and all the readouts are 0. (Query only)
Figure 16-1 4-device equivalent circuit of a crystal oscillator
Query response {numeric 1},{numeric 2},{numeric 3},{numeric 4},{numeric 5},{numeric 6},
{numeric 7},{numeric 8},{numeric 9}<newline><^END>
Readouts are as follows:
{numeric 1}: Value of C
0
(parallel capacitance).
{numeric 2}: Value of C
1
(motional capacitance).
{numeric 3}: Value of L
1
(motional inductance).
{numeric 4}: Value of R
1
(motional resistance).
{numeric 5}: Value of f
s
(motional (series) resonant frequency).
{numeric 6}: Value of f
a
(anti-resonant frequency).
{numeric 7}: Value of f
r
(resonant frequency).
{numeric 8}: Value of f
1
(frequency at which the conductance is half the maximum
value).
{numeric 9}: Value of f
2
(frequency at which the conductance is half the maximum
value). Note that f
1
<f
2
.
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