HP 8712C - Page 273

I
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Calibrating for Increased Measurement
Accuracy
Check the Calibration
Directivity
Directivity is a reflection measurement error term.
Corrected directivity less than -40 dB is expected after
calibrations have been performed. This is the same value
YOU
would measure when measuring a load standard.
di3
tl: Memory
D2: off
Log Mag
10.0 dB/ Ref -70.00 dB C
-110
I I I I
I 1 I I
I
Start 0.300 MHZ
Stan 1 300.000 MHZ
Figure 6-4. Typical Directivity Error Term
6-30