Max Operating Mode; Min Operating Mode - Promax 8 plus Manual Del Usuario Y Operador

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 PROMAX-8+ holds on the
screen the maximum measured level through a
dotted line.
This measurement is used to be carried out on the reverse band and permits to
detect intermittent interferences.
Since on this operation mode the PROMAX-8+ 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 (30
dBµV 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. It is
interesting in analogue channel measurements as well as in digital channel.
To select this representation mode you must select the MIN mode, MINIMUM
INGRESS (see section 4.2.4.5. Spectrum mode configuration menu).
In this operating mode it is advised to select the Average detector (see section
4.2.4.5. Spectrum mode configuration menu).
Figure 30.- MIN mode. First scan.
Previous figures show an example of this measurement over a digital channel.
Left figure corresponds to the first sweep. After several sweeps (right figure) an
interference is seen at the centre of the channel, which previously remain masked by
the noisy nature of the signal.
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INSTRUCTION MANUEL. PROMAX-8+
Figure 29.- MAX mode.
Figure 31.- After several scans.
May 2001