Promax -10 Manual Del Usuario página 97

USER'S MANUAL. PROMAX-10
DETECTOR
AVERAGE
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 dBµV. 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
permits to be configured
(MAXIMUM INGRESS). This option is selected on the
Spectrum Configuration menu (section 4.2.4.5). In the
MAX mode, the PROMAX-10 holds on the screen the
maximum measured level through a dotted line.
This measurement is used to be carried out on the return path and permits to
detect intermittent interferences.
Since on this operation mode the PROMAX-10 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.
04/2004
SPAN
30 MHz
15 MHz
5 MHz
1 MHz
operating mode also
as maximum hold
FREQUENCY
RESOLUTION
280 kHz
140 kHz
50 kHz
10 kHz
Figure 27.- Reference level
modification.
Figure 28.- Reference line.
Figure 29.- MAX mode.
Page 31