9
M4DDC User Manual
Experiencing TimeLock™
for the First Time
To fully understand the power of TimeLock
TM
in action it is highly recommended to experience it with
and without the TimeLock
TM
Correction algorithm running. First start by disabling TimeLock
TM
Correction from the webserver and tune to an un-aligned FM broadcast to hear the misaligned MPS
and HD-1 audio streams.
Uncheck the TimeLock
TM
Correction box (
Figure 2
) followed by clicking on Save Settings.
Figure 2
The webserver will then start to ‘Acquire Data’ from the two audio streams and begin correlating them.
In our example below (
Figure 3
) the Correlation Threshold is set to 70% (Default). Acquired data that
is below this threshold is not correlated and displayed in RED. Acquired data > 70% is considered
correlated and is displayed in GREEN.
Listening to the M4DDC-FM Demo is recommended with headphones. Plug the headphones into the
3.5mm stereo mini-jack connection located on the right side of the M4DDC-FM Demo front panel.
Hearing the misaligned audio streams is very easy using HD Radio Split-Mode audio - HD-1 audio is on
the Left Channel and MPS is on the Right Channel. The TimeLock
TM
webserver display makes
diversity delay measurements simply intuitive. In our example on the next page the MPS is behind by
43.5 MS or +1919 Audio Samples
Figure 3
Uncheck
Adjustable from
70% - 100%
