THOMSON Amethyst III, User Manual, Page: 239 / 306

Appendix B ’SNMP Management’ — Getting Input Snapshot and Statistics
Amethyst III DTV Smart Switch 239
User Manual
Input Statistics: Bitrate Measurement
Bit rates are computed as follows:
 The snapshot bit rate is the bit rate computed with a period of 500
ms.

The average bit rate is the average of 10 snapshot bit rates. It is
computed every 5 seconds.
 The minimum bit rate is the smallest bit rate of 10 snapshot bit rates.
It is computed every 5 seconds.
 The maximum bit rate is the largest bit rate of 10 snapshot bit rates.
It is computed every 5 seconds.
In the following example, there are 3 average bit rates, 3 minimum bit
rates and 3 maximum bit rates according to 30 snapshot bit rates.
Figure B-11. Input statistics: bit rate measurement