Filtering Functions; Rf Functions - Promax MO-180 Manual De Usuario

USER'S MANUAL MO-180

4.7 FILTERING functions

Packet Identification (PID) filtering can be used in an MFN network to reduce
the bit rate of an incoming TS in order to accommodate it to the useful bit rate that the
modulator can handle in a particular DVB-T/H set-up.
Every Program Elementary Stream (PES) carrying video, audio or data
contained in a TS multiplex is identified by a unique PID. The MO-180 allows the user
to eliminate up to 16 PES's from the TS. Note that the MPEG-2 TS is not really re-
multiplexed because the system information tables are not updated, only the PES's are
dropped to help reduce the bit rate. This feature finds its application in, for example,
trans-modulating a high-bit-rate DVB-S or DVB-C signal to DVB-T/H.
Mode
Select ON to enable PID filtering and OFF to disable it.
PID 01 — 16
Up to 16 PIDs can be discarded from the input transport streams. Note that the
PID search applies to both the HP and LP inputs. The valid range of decimal values is
1 to 8191. PID 0 is reserved for the Program Association Table (PAT) and cannot be
eliminated.

4.8 RF functions.

The selection of this item allows us to access those functions related to the RF
output. Let's review each option.
Frequency
This function allows the selection of the RF frequency. Changes made by
turning the rotary encoder are applied directly to the output, allowing for a smooth
tuning of the output frequency.
When entering this function, the display shows the current frequency and the
step used to modify it, if the encoder is turned. Frequency increments are positive
when turning clockwise and negative when turning counter-clockwise. The LCD panel
looks as follows:
MENU: back PUSH: select TURN: next/prev.
RF Frequency: 650000000 Hz <10MHz>
In this case, the current output frequency is 650 MHz and turning clockwise one
notch (each notch is marked by an audible tone) will change that value to 660 MHz.
In this situation, each time we press the encoder button, the frequency step will
be modified to 1 MHz, 100 kHz, 10 kHz, 1 kHz, 100 Hz, 10 Hz, 1 Hz and again to
10 MHz, allowing a cyclic selection of the desired step value.
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