Instrument Configuration - Promax PRODIG-1+ Manual De Instrucciones

USER'S MANUAL PRODIG-1+.
Active function Measured value
indicator of the LNB voltage
SNR value in dB
The top line of the screen shows the measured LNB voltage and whether the 22
kHz are present (see figure 15). It also shows whether a signal with valid transport
stream is detected at the frequency (or frequencies) assigned to a specific satellite (in
which case 'snr' or 'SNR' appears on screen).
Note: For the final step of precise adjustment and signal quality optimisation, it is
important to select the test point where the signal is at its most critical. This
guarantees the quality of the other points with more favourable conditions.
If a signal with a valid transport stream presents a signal/noise ratio (SNR) greater
than the value internally defined by the instrument as the threshold for a good quality
signal, then the screen shows the message 'SNR'. Otherwise, if the value is below this
threshold, the screen will show the message 'snr'. The instrument is delivered already
configured with a quality threshold of 5 dB. This value corresponds to the DVB
recommendation for a CODE RATE = 3/4. Nevertheless, the user can alter this value to
adapt it to his own quality specification. (see section '4.3 Instrument Configuration').
If, on moving the antenna, the signal noise ratio value exceeds the quality
reference, then the instrument will emit a high-pitched acoustic signal. On the other
hand, if the value is below the quality reference then the instrument emits a low-pitched
signal.
If you wish to measure the signal/noise ratio for other satellites memorised by the
instrument and you know that the antenna is correctly oriented, you can change
satellites by pressing key

4.3 Instrument Configuration

The various parameters and information stored in the PRODIG-1+ may be modified
by entering the Service Mode and using the SH.EXE PC program. This program is
supplied with the instrument (RM-001).
05/2003
22 kHz signal
The signal is applied
The signal is not applied
Bar-graph of the SNR
Figure 15.- Measuring SNR.
[3] until you have selected the right one.
Signal indication
No signal with a valid transport
stream can be detected
snr: Valid signal with an SNR
smaller than that defined
as threshold
SNR : Valid signal with an SNR
greater than that defined
as threshold
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