User Manual

SARK-110-ULM User’s Manual
Rev 1.0 June 22
th
, 2019 - 47 - © 2019, Melchor Varela – EA4FRB
Ca
Equivalent capacitance at F = 1 MHz
Ra
Equivalent resistance at the self-resonant frequency
The capacitor’s parasitic inductance is calculated with the following equation:
2
)2(
1
FraCa
La

=

The quality factor is calculated using the following equation:
)2(
1
RaCaFop
Qa

=

4.2.3 Quartz Crystal
This function determines the equivalent circuit model of quartz crystals. Detailed usage of this
function is described in the Application Note available at: http://www.sark110.com/application-
notes/equivalent-circuit-determination-of-quartz-crystals
The measurement procedure is as follows:
Select the file name to store the data.
Press the Return [ ] button if not
needed to save the data.
Enter the frequency value, which should
be close to the expected resonant
frequency of the crystal
Enter the estimated crystal bandwidth
value