Promax -10 Manual Del Usuario página 87

USER'S MANUAL. PROMAX-10
In the SCAN operating mode, all channels are considered as analogue, as a
consequence digital channels power must be measured always from the
CHANNEL-FREQUENCY operating mode.
4.2.2.1 SCAN mode configuration
In the SCAN operating mode, pressing the
CONFIG key [14] will access the configuration menu
for this mode.
This menu permits to change two parameters:
THRESHOLD and REFERENCE LINE . To accede to
any of them, turn the rotary selector [9] 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 [9] again.
a) 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.
b) 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.
To leave the SCAN operating mode configuration menu, just press the key of the
operating mode you wish to access.
4.2.3 CHANNEL-FREQUENCY operating mode
CHANNEL-FREQUENCY
The
measurements:
Analogue channels :
04/2004
operating
- Video carrier level
- Carrier / Noise (C/N) ratio
- Video / Audio (V/A) ratio
- CSO-CTB intermodulation distortion measurement
IMPORTANT
Figure 12.- SCAN configuration menu.
IMPORTANT
mode provides the following
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