Spectrum Analyser - Promax TV EXPLORER HD User Manual

5.16 Spectrum Analyser

Spectrum Analyser
The
the frequency band in quickly and easily and to make measurements at the same time.
To select it press
the next figure.
The horizontal lines define the signal level, the broken lines being separated a
distance equals to 10 dB. The level of the top line (70 dBµV in previous figure), named
Reference Level
, can be altered using the vertical cursors
60 dBµV to 130 dBµV by steps (from 70 dBµV to 130 dBµV in satellite band). The vertical
measurement range changes to 5 dB/div by holding pressed the lower arrow cursor key
[6] and changes to 10 dB/div by holding pressed the upper arrow cursor key
The signal level for each frequency is displayed vertically, the lower frequencies
appear at the left of the screen and the higher ones at the right. The amplitude of the
lobes is calibrated. In the example in previous figure the noise level is at around 25 dBµV
and the lobe with the highest signal level (third from the right) is at 70 dBµV.
In the case that the equipment detects saturation on
signal, it will appear the icon
SYNC: FAIL
in the TV mode to indicate this situation. The user must increase the
Reference Level in order to activate an additional attenuator and to avoid the input
saturation.
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mode allows the user to discover the signals present in
[13] key. The monitor will show a picture like the one described in
Figure 46.-
Spectrum analyser mode.
in the Spectrum Analyser mode and the message
TV EXPLORER HD / HD
USER'S MANUAL.
[6] key over a range from
RF
input due to an excess of
LE
[6].
10/2012