Televes TOX Series, Руководство пользователя

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channel from the table selected as well as the
off set regarding the central channel frequency. The
permitted off set values depend on the frequency
step selected (see confi guration menu):
• Steps of 125KHz: ±4 (-500, -375, -250, -125, 0 ,
125, 250, 375, 500 KHz)
• Steps of 166KHz: ±3 (-500, -333, -166, 0 , 166,
333, 500 KHz).
Bandwidth possible values are 7 and 8 MHz.
The output level control permits values between
00 and 99.
Output modes available are:
Norm. : Normal Output Mode.
Cw : A continuous carrier is generated on the
selected output frequency (it is useful to balance
the headend when there is no signal at its input).
Off : None output signal is generated.
c. Service menu
This menu shows the list of input transport stream
services. Each time the user selects a new input
transport, the unit performs a search for the
services.
During that process the unit will display the
following message, indicating the number of
services found:
SERVICE
Scanning: 13
Once the search is complete, it shows the list of
services with the following information (see next
fi gure):
SERVICE
2/8 18/25
La 2
OFF
The service order number as well as the total
number of services in the multiplex (the fi gure
indicates that the 2nd service out of 8 services,
is available), the statistics (18/25), the name of
the service and if the user has selected it to: be
removed from the output (OFF), be unscrambled
(DCY), or to pass through without modifi cation
(ON).
Statistics (xx/yy) indicate the following: the fi rst
number indicates the percentage of the output
occupied by the service. The second number
indicates the percentage of the output that is free.
In the example, the service “La 2” will occupy 18%
of the output (it is OFF so it is going to be removed)
and there is 25% of free space. Therefore, it is easy
to see that, this service might be activated (ON or
DCY) because there is still suffi
cient capacity at the
output. The free percentage at the output is only
updated once the confi guration of the services has
been recorded.
Additionally, the status (scrambled or clear) of the
service, both at the input and output are indicated
in the upper right hand corner:
Scrambled service at input and output.
Scrambled Service at input and clear at
output.
Scrambled service at input.
d. Measurements menu 1
The following menu provides an indication of the
input
signal quality to the COFDM demodulator
by using as estimate of the input CBER (Channel Bit
Error Rate).