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Concepts and features

R&S

ZNB/ZNBT

193User Manual 1173.9163.02 ─ 62

Example:

The following examples show minimal port assignments for a Full 9-Port calibration

using a four-port calibration unit:

Table 4-11: Full 9-port calibrations: star-shaped optimum solution

Test Port Assignment 1 Assignment 2 Assignment 3

1 Cal Unit Port 1 Cal Unit Port 1 Cal Unit Port 1

2 Cal Unit Port 2 - -

3 Cal Unit Port 3 - -

4 Cal Unit Port 4 - -

5 - Cal Unit Port 2 -

6 - Cal Unit Port 3 -

7 - Cal Unit Port 4 -

8 - - Cal Unit Port 2

9 - - Cal Unit Port 3

Table 4-12: Full 9-port calibrations: line-shaped optimum solution

Test Port Assignment 1 Assignment 2 Assignment 3

1 Cal Unit Port 1 - -

2 Cal Unit Port 2 - -

3 Cal Unit Port 3 - -

4 Cal Unit Port 4 Cal Unit Port 4 -

5 - Cal Unit Port 1 -

6 - Cal Unit Port 2 -

7 - Cal Unit Port 3 Cal Unit Port 3

8 - - Cal Unit Port 1

9 - - Cal Unit Port 2

4.5.6 Scalar power calibration

The purpose of a scalar power calibration is to ensure accurate source power levels

and power readings at a particular position (calibration plane) in the test setup. Scalar

power calibration is different from the system error correction described in Chapter 4.5,

"Calibration", on page 162.

A power calibration is required for accurate measurement of wave quantities or ratios

(see section Chapter 4.1.5, "Data flow", on page 98). For best accuracy, choose a cali-

bration method according to the table below.

Calibration

R&S ZNB Series User Manual

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