Philips 14AA3322/40B Guía de instalación descargar pdf (Pagina 116)

Generation of a transport stream for DVB and realisation of a HF-modulated DVB-signal

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Figure 2.7: PCR tab

Question27:

What do we see at the PCR tab? What is the PCR?

The PCR is every copy from the SCT (System Time Clock). It has to be transmitted at least every 40ms in

order to let the decoder to lock on the transmission. If it doesn’t happen, we have a “PCR error”. As we

can see on PCR Interval, all the PCR are under 40ns.

On the PCR_AC Snapshot we see the PCRs that are being received in a period of time. On PCR Density we

can see the deviation of the received PCR versus the ideal reception (which should be 0).

Finally, on the TR 101 290 tab you can find if any error has occurred:

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Philips 14AA3322/40B Guía de instalación Pagina 116