:CALC<Ch>:EPAR:S4

Type

Query

Syntax

:CALCulate<Ch>:EPARameters:S4?

Description

This command returns the result of the 4-device equivalent circuit parameters of a crystal oscillator. The sweep parameter should be frequency, and the measurement parameter should be Z-θ for this analysis.

C0, C1, L1 and R1 are calculated using the following equations.

C0 = C1 × fr2/(fa2 - fr2)

C1 = 1 /(Q × R1 × 2 × π × fs)

L1 = Q × R1 /(2 × π × fs)

R1 = 1 / Gmax

Q = |fs / (f2 - f1)|

If there are no fa and fr points on the admittance chart, C0 is calculated using the following equation.

C0 = Bfs /(2 × π × fs)

Query Response

{numeric1 (C0)}, {numeric2 (C1)}, {numeric3 (L1)}, {numeric4 (R1)}, {numeric5 (fs)}, {numeric6 (fa)}, {numeric7 (fr)}, {numeric8 (f1)}, {numeric9 (f2)} <^END>

C0 (parallel capacitance)

C1 (motional capacitance)

L1 (motional inductance)

R1 (motional resistance)

fs (motional (series) resonant frequency)

fa (anti-resonant frequency)

fr (resonant frequency)

f1 (frequency at which the conductance is half the maximum value)

f2 (frequency at which the conductance is half the maximum value. Note that f1<f2)

Examples

Dim Var as Variant
Ana.WriteString ":CALC1:EPAR:S4?", True
Var=Ana.ReadList(ASCIIType_R8, ",")

Related Commands

:SENS:SWE:TYPE

:CALC:PAR:DEF

Equivalent Softkey

No equivalent key is available on the front panel.

COM Command Syntax (Internal Control Only)

SCPI.CALCULATE(Ch).EPARAMETERS.S4