Promax PROLINK-4C, Manual

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USER’S MANUAL. PROLINK-4C
02/2003 Page 87
E
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g
lis
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When the NICAM option is selected, it is possible to measure the Bit Error Rate
of the modulation. To obtain this measurement, from the TV operating mode, level
measurement, press key [2] in order to activate the mode of maximum
measurement information displayed on the screen (name assigned to memory, power
supply to external units, sound, colour system, TV standard, level and
frequency/channel). In the position relative to the type of Sound will appear the
information about the type of NICAM according to:
Sound: Type + Error
Type = NICAM type:
"--": no NICAM is detected
"du": dual NICAM
"st": stereo NICAM
"mo" mono NICAM
Error = indication of the bit error rate:
"E
↓
": error rate < 1e-5
"E5": 1e-5 < error rate < 1e-4
"E4": 1e-4 < error rate < 1e-3
"E3": 1e-3 < error rate < 2.7 e-3
"E
↑
": error rate > 2.7 e-3
Therefore, for example, the indication Sound: duE
↓
has to be interpreted as
NICAM sound is selected, the detected NICAM is dual and the error rate is below
1 e-5.
4.12 Measurement Configuration Memories
To facilitate measurement, the PROLINK-4C is able to store up to 99
configurations in an internal memory. In this way, it is possible to select the most
common transmissions in a work area with their corresponding configurations quickly
and easily.
The following parameters are stored in each configuration: the name assigned
to the configuration, frequency or channel number, TV system, type of measurement,
external units supply voltage (VLNB), measurement units, sound parameters, LNB-
oscillator frequency, channel bandwidth (digital), symbol rate (digital), code rate (digital)
and spectral inversion (digital).
The different measuring configurations can be retrieved with the Datalogger
function, in order to conduct different data acquisitions in a completely automatic way
and store them in the memory for later print-out or processing (see paragraph '4.9.4.4
Datalogger function').