Tektronix MTM400 - Manual (Page 80)

Stream View
3-32 MTM400 MPEG Transport Stream Monitor User Manual
Only administrators can adjust bit rate limits.
Bit Rates
The program bit rate (Bit Rate) shows the sum of the individual bit rates for all the
PIDs that make up the program.
NOTE. It is possible that in certain transport streams, different programs may
reference a single PID; for example, programs may reference one PCR PID. In
these cases, the PID bit-rate will be included in all the programs from which the
PID is referenced. Therefore the total bit-rate of all the programs may add up to
more than the total stream bit rate displayed at the top of the window.
Change Bar
The Change Bar indicates the variation of bit rates in each program. The ends of
the Change Bar show the maximum and minimum values of the bit rate since
monitoring started or since the change bars were last reset.
The Change Bar on all programs can be reset by selecting the
Reset Change Bars button at the top of the Programs screen.
Bit Rate Limits
For each program it is possible to set a minimum ( ) and maximum ( ) bit rate
limit. If the incoming bit rate falls outside the values that have been set, an alarm is
indicated on the screen by a color change in the graphical bit rate bar; the Program
Occupancy test and state icon on the Tests view are also set. This test can also
activate the external alarm outputs. When enabled, the limits appear as in the
preceding diagram shown above.
Change Bar
Minimum Limit Maximum Limit