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Spectrum Analyzer Mode Key Descriptions
Spectrum Analyzer Mode Functions
N
dB
PTS
ON OFF
automatically places two markers at points N
dB
from
the highest point on the highest displayed signal, and
determines the frequency difference between the two
markers. N
dB
is the active function and the value of N is
set by the user. The measurement defaults to 3
dB
when
it is first turned on. The measurement runs continuously
re-executing at the end of each sweep.
NEW
EDIT
No other signal can appear on the display within N
dB
of
the highest signal. The measured signal cannot have more
than one peak that is greater than or equal to N
dB.
A signal
must be greater than the peak excursion above the threshold
to be identified. The setting for peak excursion may be
increased from the 6
dB
default value so that noise will not
be identified as signals. Increasing the value too much may
cause a smaller signal to be missed or misinterpreted as part
of a larger signal. The amplitude scale may be either linear
or logarithmic.
Front-Panel Key Access
(jj)
Refer to the
HP 8590 E-Series and L-Series Spectrum
Analyzers and HP 8591C Cable TV Analyzer Programmer’s
Guide for more information.
starts the DLP editor function, clearing the DLP editor
memory to create a new item in the analyzer 2500 byte DLP
editor memory. The item will not be in the analyzer user
memory until it is processed by the SAVE EDIT
softkey.
The DLP editor memory buffer remains intact when the
instrument is preset and when it is powered off.
Front-Panel Key Access [RECALL) or
ISAVE_)
6-99