Test Functions - Promax MO-160 Manual Del Usuario

USER'S MANUAL. MO-160
Level changes are applied immediately to the RF output, to allow smooth and
easy adjustment of RF output conditions. Pressing the encoder or MENU key exits this
function.

4.7 TEST functions

This menu contains a series of parameters used to correctly carry out all types of
transmission tests using the MO-160 modulator.
MODE: Selects the test to be carried out. Available options are:
NONE: Normal COFDM output.
CBER: Inject channel bit errors to obtain a non-zero BER before the Viterbi
decoder (Channel BER).
VBER: Inject bit errors to obtain a non-zero BER after the Viterbi decoder
(Viterbi BER or simply BER).
Blank carriers: Blank carriers starting at index Start Carrier and ending at
index Stop Carrier (see below).
Pilots only: Generate a DVB-T signal containing pilot carriers only (continual
and TPS).
PRBS/TR 290: Replace the input to the constellation mapper with a PRBS
sequence of length 2
document ETSI TR 101 290.
The following two parameters select the carrier interval to blank, in order to make
measurements of intermodulation noise and/or quantisation noise within the channel.
Start Carrier: Selects the initial index (from 0 to 1704 in 2K, 0 to 6816 in 8k)
of the first carrier to blank within the COFDM ensemble.
Stop Carrier: Selects the final index (from 0 to 1704 in 2k, 0 to 6816 in 8k) of
the last carrier to blank within the COFDM ensemble.
02/2008
15
-1 or 2²³-1(see PBRS bits entry above) as specified in
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