Tektronix MTM400 - Manual (Page 168)

Interface Configuration and Interpretation
3-124 MTM400 MPEG Transport Stream Monitor User Manual
BER (Pre-Viterbi)
This indicator reads the BER in the channel, before any error
correction is applied.
Input Card Screen - COFDM
Figure 3-45: Input card screen - COFDM (Example)
Five LED indicators are available on the Readings section of the screen:
Overall RF Lock:
All the lock indicators are showing “in lock”, and the signal is
being received normally.
TPS Lock Transmission Parameter Lock, showing true if the ruggedly
modulated TPS is being received.
AGC Lock Automatic Gain Control lock, showing the received signal is
within AGC control range.
SYR Lock Symbol Recovery Lock, showing that the FFT symbol recovery
system is in lock, allowing constellation data to be extracted.
FEC Lock Showing the Reed Solomon Forward Error Correction system is
in lock, and applying error correction to the received data.