Chapter 4 257
Key Function Descriptions
Key Descriptions
To avoid this error, update the CAL THRU or CAL
OPN/SHRT state register with the current state before
turning NORMLIZE ON OFF on. The CAL THRU state
register is state register 9. The CAL OPN/SHRT state
register is state register 8. Make sure the trace is
updated before saving the state.
Front-panel key access:
AUX CTRL or TRACE
OCCUPIED[ %] Allows you to enter the desired percentage of occupied
power for the OCCUPIED BANDWDTH and ∆MKR →
OCC % functions. The settability is 0.01% and the
current percentage is displayed on the softkey label.
Front-panel key access:
MEAS/USER
OCCUPIED BANDWDTH Integrates the power displayed and places the
delta markers at the points containing the desired
percent of the power. The occupied power bandwidth
can be read directly from the delta markers. The
OCCUPIED [ %] softkey is used to select the desired
percentage of power to be measured.
The power-bandwidth routine first computes the
combined power of all signal responses contained in the
trace. It then puts markers at the frequencies for which
1/2 of (100 − occupied %) of the power lies to the right of
the right marker and to the left of the left marker.
Thus, theselected percent of the power lies between the
markers. The difference between the marker
frequencies is the occupied power bandwidth for the
selected occupied percentage, and is displayed
on-screen.
Front-panel key access:
MEAS/USER
OCCUPIED PWR MENU Accesses the occupied power bandwidth menu
including the OCCUPIED BANDWDTH, OCCUPIED [
%], ∆MARKER OCC BW and CH EDGES →∆MKR
softkeys.
Front-panel key access:
MEAS/USER
PEAK EXCURSN Defines what constitutes a peak on a trace. To enter a
value, use the data keys, step keys, or the knob and
terminate the entry with
dB. The value specifies the
amount that a trace must increase monotonically and
then decrease monotonically in order to be a peak. For
example, if the peak excursion is 5 dB, the amplitude of
the sides of a candidate peak must descend at least 5
dB in order to be considered a peak (see <Undefined
Cross-Reference>).
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