Televes 564980, Руководство пользователя

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DUAL A/D CHANNEL PROCESSOR
14
Channel mode operation for digital signals
If the digital signal option has been selected, it is
displayed the number of the
output channe
l as
well as its
central frequency
.
The
offset option
shifts the central frequency
of the output channel an amount which can be
configured by selecting one of the following
values: +4, +3, +2, +1, 0, -1, -2, -3, -4.
Frequency steps for this option can also be
configured in the corresponding extended menu.
There are three choices: 25 KHz, 125 KHz and
166.66 KHz.
Finally, it will be displayed the
output level , which
can be changed using a scale of selectable values
from 00 to 99:
• By selecting 99, the output level is the maximum
that the unit can deliver (25 dBmV approx.).
• As soon as it is selected a lower value than 99,
the output level will decrease all the way down
till select 00, which is an output level 15 dB less
than its maximum output level.
Channel mode operation for analog signals
The display will show the number of the output
channe
l as well as its
Video Carrier
frequency.
This operating mode has not available the offset
option.
Concerning the output level, it follows the same
rules as above, and the display shows:
AOUTPUT
Frequency:
474.00 Mhz
Level: 99
Frequency mode operation
The display will show, either the Video Carrier
frequency (for analog signals) or the central
frequency of the channel (for digital signals).
Output frequency values range from 47 to 862
MHz.
The output level follows the same rules as above.
To modify parameters, scroll through the menu by
pressing button (short press) until the required
parameter flashes; then change it with buttons
or .
b. Input Menu
Allows selection of the input channel , in either
channel mode or frequency mode, and the
input
frequency offset
for digital channels.
The contents of the input menu depends on how
the unit has been programmed the last time
(frequency mode/channel mode; digital mode/
analog mode) as can be done in the extended
menu.
Channel mode operation for digital signals
The display will show the input channel as well as
its
central frequency
.
Additionally, the offset option shifts the central
frequency of the input channel an amount which
can be configured by selecting one of the following
values: +4, +3, +2, +1, 0, -1, -2, -3, -4.
Frequency steps for this option can also be
configured in the corresponding extended menu.
There are three choices: 25 KHz, 125 KHz and
166.66 KHz.