Agilent Technologies 8753ET User Manual page 301

Fringe Capacitance
All open circuit terminations exhibit a phase shift over frequency due to fringe capacitance. Offset open
circuits have increased phase shift because the offset acts as a small length of transmission line. Refer to
Table 6-1.
Table 6-1 Calibration Standard Types and Expected Phase Shift
Test Port Connector Type
7-mm
Type-N male
3.5-mm male
3.5-mm female
2.4-mm male
2.4-mm female
Type-N female
75Type-N female
7-mm
Type N-male
3.5-mm male
3.5-mm female
2.4-mm male
2.4-mm female
Type-N female
75 Type-N female
Standard Type
Short
Offset Short
Open
Offset Open
Calibrating for Increased Measurement Accuracy
Calibration Considerations
Expected Phase Shift
180

360
180 + ------------------------------ -

0 +

0
+
capitance
 l  
f
c
capitance
  l  
360 f
+ ------------------------------ -
c
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