Scan Mode Configuration - Promax -12 User Manual

Qam analyser
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IMPORTANT:
3.3.1

SCAN mode configuration

In the SCAN operating mode, pressing the CONFIG key
configuration menu for this mode.
This menu permits to change three parameters: THRESHOLD, REFERENCE
LINE and POWER MEASUREMENT. To access to any of them, turn the rotary
selector until it appears shaded and next press the selector, then the value of the
parameter will appear shaded and turning the selector you will be able to modify
its value. Finally, to validate the new value, press the rotary selector again.
THRESHOLD
It defines the minimum level to show channel on the display (OFF or
between 21 and 120 dBµV). If the threshold is deactivated (OFF), on the
SCAN representation will appear all the active channels of the channel plan
with a level higher than 20 dBµV. Otherwise, if we define a level for the
THRESHOLD parameter, channels with a level lower than the threshold
value will not be displayed.
REFERENCE LINE
It permits to activate or to deactivate (OFF) a reference line on the SCAN
graph (between 21 and 120 dBµV). This reference line allows to establish
judgements of channel level acceptance just with a glance at the SCAN
screen.
January 2015
In the SCAN operating mode, all channels are considered
as analogue. When the power of a digital channel is
measured in this mode, the instrument does not carry out
the integration of the power values, but it just measures at
the central frequency of the digital channel. Then, the
resulting value is not calibrated and is 6 or 7 dB lower than
the
measurement
mode, which does the power integration
Figure 13. SCAN configuration menu.
made
in
the
CHANNEL-FREQUENCY
will access the
3-17

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