Omicron Bode 100 User Manual

55
Frequency Sweep Mode
15.To measure the group delay of the quartz filter at its series resonance
frequency, select Tg in the Format list.
The following figure shows the group delay measured by Trace 1 at the
series resonance frequency marked by cursor 1.
Result: The group delay T
g
at the series resonance frequency of the quartz
filter is 314.2 μs. Due to the high attenuation at the parallel resonance
frequency it is not possible to measure the group delay at the quartz filter’s
parallel resonance.
Your result might be slightly different because even quartz filters show
variations in their electrical characteristics.
16.For the measurement of the series resistance of the quartz filter we will use
the Smith chart. The Smith chart displays the reflection coefficient (see (Eq.
4-3) on page 34) in the complex plane. The horizontal axis represents the
real component and the vertical axis the imaginary component of the DUT's
reflection coefficient. The central point of the Smith chart corresponds to the

Omicron Bode 100 Specifications

General

Brand	Omicron
Model	Bode 100
Category	Measuring Instruments
Language	English