Understanding A uto T ransport M ux R ate
Auto T ransport M ux R ate ( TMR) i s a f eature o f A dtec E N-Series b uilt w ith t he o ptional
modulator. T his f eature w ill a utomatically c onfigure t he o verall d ata r ate o f t he e ncoder ( its
TMR;Transport M ux R ate), b ased u pon i ts M odulator c onfiguration. I n o ther w ords, w hen t he
modulator T ransmit c onfiguration i s s et t o ' ENABLED', t he e ncoder's T MR b ecomes t he
Modulator's c onfigured I nterface R ate. T he T MR i s a k ey c onfiguration f or m odulator
functionality a nd m ust m atch t he m odulator i nterface r ate.
Please n ote t hat t he c onfigured v ideo a nd a udio d ata r ates m ust b e l ower t han t he
targeted m odulation d ata r ate f or t his f eature t o w ork p roperly.
For e xample, H D V ideo ( 3Mbps) + 8 p airs o f M peg1 L ayer2 @ 3 84Kbps ( 3 .072Mbps
) = ~ 6.2Mbps.
The T MR w ill n ot f it i nto a 3 MBaud D VB-S Q PSK 3 /4 m odulation c onfiguration ( A s
3Mbaud w ith t his s ettings w ould o nly s upport a d ata r ate o f 4 .14Mbps). I n t his c ase,
additional a udios w ould n eed t o b e t urned o ff o r r ates a djusted t o m eet t he 4 .14Mbps
modulation d ata r equirement.