Directivity (Edf And Edr); Description; Affected Measurements - HP 8753E Service Manual

Directivity

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.
test port connectors
n
test port cables
n

Affected Measurements

reflection device measurements are most affected by directivity errors.
Low
Figure 11-2. Typical EDF/EDR without and with Cables
i i i i i i i i i I
Error Terms 1 l-1 1