2-12
Supplement for the Reference Guide (Firmware Revision 7.66)
Hardkey/Softkey Reference
turns ripple testing on or off. When ripple testing is on, the
analyzer sets the lower ripple limit line at the lowest
amplitude point within the frequency band and sets the
upper limit line at the user-specified amplitude above. If
the trace data remains at or below the upper limit line,
that portion of the ripple test passes. If the trace data rises
above the upper limit line within the frequency band, the
test fails. Data within each frequency band is compared
with the defined ripple limit of the band. The ripple test
checks each frequency band using this method. A
maximum of 12 frequency bands can be tested on each
channel. These bands may overlap in frequency. If all of
the channel’s frequency bands pass the ripple test, the
analyzer displays a pass message.
If the test passed, a message is displayed in orange text in
the upper right portion of the LCD. An example of this
message is: RIPL1 PASS, where the “1” indicates the
channel where the ripple test is performed. If the ripple
test does not pass, a fail message is displayed in red text.
An example of this message is RIPL1 FAIL.
displays the ripple value of the selected frequency band.
The ripple value can be displayed in two ways or turned
off. Selecting OFF removes the displayed ripple value from
the display. Selecting ABSOLUTE or MARGIN displays
the ripple value. The ripple value is preceded on the
display by an indicator of the selected band. For example,
when the ripple value is preceded by “B2”, this indicates
that the ripple value shown is for Band 2. The frequency
band indicator and ripple value are displayed in the same
color as the pass/fail message for the overall ripple test.
When ABSOLUTE is selected, the display shows the
absolute ripple of the data trace within the frequency
band.
When MARGIN is selected, the display shows the
difference between the maximum allowable ripple and the
absolute ripple value within the frequency band. When the
margin value is preceded by a plus sign (+), this indicates
that the ripple within the selected frequency band is
passing by the value shown. When the margin value is
preceded by a negative sign (−), this indicates that the
ripple within the selected band is failing by the value
shown.
selects a frequency band to display the ripple value. When
is set to the absolute or margin choices,
this softkey selects the ripple measurement for the
selected frequency band.
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