Interface Configuration and Interpretation
EVM (%) | (Error Vector Magnitude) Closely related to, and can normally |
| be calculated from, MER. It is a ratio of 'errored signal vectors' |
| to maximum signal amplitude expressed as a percentage |
| (ref: TR 101 290 Annex). |
BER | (Bit Error Rate) Provides an indication of the Forward Error |
| Correction workload. |
TEFs | (Transport Error Flag or TEI transport error indicator) Indicates |
| the Forward Error Correction failure. |
Lock | If the interface is able to acquire full lock onto the channel and is |
| receiving the signal correctly, the Lock indicator will light up |
| green. Red indicates that lock cannot be achieved. Gray |
| indicates that a signal is not present. |
The Settings area of the screen contains the following controls:
Update (s) Allows the period in seconds between samples of the incoming signal to be set.
Persist | Allows the time that the dots persist on the grid display to be set. |
The Log area of the screen contains the following controls:
File | Constellation data can be written to the file identified in this |
| field; data is saved in csv format. |
MTM400 MPEG Transport Stream Monitor User Manual |