emitor COMBOLOOK Color Manual page 13

that will give the user a reference for the “concentration” of the data-stream.
• Four ”lock-parameters” and a time counter (that shows the “lock-time” on a bit-
stream”) are shown on the right of the CRT display.
When these "lock parameters" are met, the circles on the left of each will fill-in
(become white) and the “Lock Timer” clock will begin countdown (indicating a
digital transponder lock has occurred with that particular signal).
If no lock occurs, or if the signal fades in and out, the signal is either very poor
and/or weak.
Fine-tune adjustment of the dish may be required and/or check the setting of the
LNB to improve the signal.
• The other measured data such as S/N-ratio (signal/noise ratio) and BER (Bit
Error Rate) are displayed just under the constellation diagram as Bar graphs
(thermometer-scales). The higher level, the better the quality of the signal !
Example of a “Locked” frequency: Example of a “Locked” frequency:
Example of a “Locked” frequency: Example of a “Locked” frequency:
The window also displays the following Digital readout:
Freq: Freq Freq Freq The frequency that the meter’s tuned to.
AFC: AFC Automatic frequency control -the instrument automatically adjusts the
AFC AFC
frequency and tells the offset frequency from the center of the carrier.
SR SR: Symbol Rate of the signal transmission.
SR SR
FEC FEC FEC FEC: Forward Error Correction.
CB: CB Corrected Bits –Bits that have been corrected in Viterbi.
CB CB
The Lower the number; the better
UCB UCB: UCB UCB Uncorrected Blocks – Blocks unable to be repaired. Value should be zero.
Even small numbers of uncorrected block will result in loss of picture
(mosaic).
NIT NIT - - - - Network Information Table. Network Information Table.
NIT NIT Network Information Table. Network Information Table.
The word "searching" is displayed on right side of the LCD as soon as a
digital transponder is locked. After about 5-10 seconds, if if if if the satellite is
transmitting NIT, the satellite position will appear (and in some cases the
satellite name also), for ex Astra 19.2. Pressing button #4 "Channels" will
show a list of the present TV- and Radio-channels on that specific
transponder/frequency. (See the following diagram)
.
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