USER’S MANUAL. PROPOWER-5
02/2007
Page
23
En
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lis
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Figure 20.-
SPECT mode,
span reduction.
Figure 21.-
Reference
Level modification.
Figure 22.-
Reference line.
By pressing the rotary selector [9]
you can alter the
span
between 1 MHz
and 50 MHz.
By pressing the rotary selector [9]
again the
reference level may be modified.
Pressing the rotary selector [9] a
second time will activate the tuning
frequency field of the marker, being possible to tune
new frequencies.
The attached figure shows an horizontal line at
45 dBm. This line allows to identify levels over a
reference of our interest easily. The activation and
definition of this
reference line
is carried out on the
spectrum analyser configuration menu.
4.2.4.2 MAX operating mode.
The SPECTRUM operating mode also permits to
be configured as
maximum hold
(MAXIMUM
INGRESS). This option is selected on the Spectrum
Configuration menu (section 4.2.4.5). In the
MAX
mode, the
PROPOWER-5
holds on the screen the
maximum measured level through a dotted line.
This measurement permits to detect intermittent
interferences.
Since on this operation mode the
PROPOWER-5
holds on the screen the
maximum measured value (through a dotted line), after making several measurements
over the band, it will be possible to detect impulsive type interferences. It is advised to
previously define a reference line which actuates as a maximum noise threshold (-10
dBm on previous figure).
4.2.4.3 MIN operating mode.
This measurement permits to detect permanent channel interferences that in an
other way could remain masked because of the variable nature of the signal.
To select this representation mode you must select the
MIN
mode, MINIMUM
INGRESS (see section
4.2.4.5. Spectrum mode configuration menu
).
Figure 23.-
MAX mode.
