HP 8753E - Directivity (EDF and EDR); Description; Affected Measurements

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Directivity

(EDF

and

EDR)

Description

Directivity is a measure of any detected power that is reflected when a load

is attached to the test port. These are the uncorrected forward and reverse

directivity error terms of the system. The directivity error of the test port

is determined by measuring the reflection

(Sll,

S22)

of the load during the

error-correction procedure.

S-cant

System Components

load used in the error-correction (calibration)

test port connectors

test port cables

Affected Measurements

Low

reflection device measurements are most affected by directivity errors.

i i i i

sg632s

Figure 11-2. Typical

EDF/EDR

without

and

with Cables

Error Terms

l-1

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