HP 8712C User Manual

I
-
Calibrating for Increased Measurement
Accuracy
Check the Calibration
Source Match Source match is an error term which can be used to
determine the magnitude of re-reflections from the source
port (RF OUT).
Reflection calibrations always correct for source match.
The two transmission calibration types that will correct for
source match are Enhanced Response and Test Set Cal. (Test
Set Cal is only available when using your analyzer with
a multiport test set. If you are using a multiport test set,
refer to its User’s Guide for more information.) A corrected
source match of < -30 dB indicates a good calibration for
these two calibration choices. See Figure 6-5.
+I: Memory +I: Memory
D2: Off D2: Off
Log Mag Log Mag
5.0 dB/ Ref -55.00 dB C 5.0 dB/ Ref -55.00 dB C
I I
1 1
I
I
I "
-65.
-70
Start 0.300 MHZ Start 0.300 MHZ
St.00 1 300.000 MHZ St.00 1 300.000 MHZ
Figure 6.5. Typical Source Match (Corrected) Error TermFigure 6.5. Typical Source Match (Corrected) Error Term
All other calibration types do not correct for source match.
The source match error term for other types of calibrations
will be equal to the raw source match of the port in these
cases. See Figure 6-6.
This value can be in the - 15 dJ3 range.
6-31

HP 8712C Specifications

General

Brand	HP
Model	8712C
Category	Measuring Instruments
Language	English