Technical data

400 Chapter 14
Return Loss
Measuring Return Loss
Return Loss
Setting the Pass/Fail Limits
The measurement limits setting enables you to alter the value of the upper limit.
Limits are set in dB and are relative. The setting you choose defines the location of
the limit line displayed on the screen. The setting affect the metrics color display:
red represents fail, green represents pass.
To Set the Measurement Limit:
Step Notes
1 [Setup]
2 [Limits]
3 On [Limits] select
On or
Off.
Enables you to toggle the measurement limits
function On (active) and Off (inactive).
• If set to On, a limit line is displayed on the
screen. The “Best” Return Loss value must
equal or exceed the limit line to generate a Pass
Indication (P). If the “Best” Return Loss value
does exceed the limit line, a Fail indication (F)
will be displayed.
•If set to
Off, neither a limit line is displayed nor
is a pass fail indicator seen in the metrics
display portion of the display.
4 Set the limit.
a. [RTN Loss Limit]
b. Enter the number on
the numeric keypad.
c. [dB]
Maximum limit: Ref Level (top of display)
Minimum limit: bottom of display