Installation manual

Revision F • 3/12
HARRIS CORPORATION
3-10
3 Control Center Software
NOTE: Always confirm which HDE-
200 the ECC app is connected to—
especially when there are multiple
HDE-200 Exporters in the network,
before editing any settings.
3.5.3 DELAY CONTROL MENU
This Menu is where the Diversity Delay settings
are defined and where the HD Radio mode:
Enable Blend or Enable Ballpark Mode is set.
Because of the significant time difference be-
tween the HD Radio signal (due to its encoding,
transmission, and decoding processes) and the
analog signal transmitted via standard FM, for the
HD Radio tuner to seamlessly blend from the
analog signal to the HD Radio signal, the analog
broadcast signal must be time delayed by mul-
tiple seconds to stay time-aligned with the HD
Radio signal.
3.5.3.1 Setting the Diversity Delay
Up to twelve and half seconds of Diversity De-
lay
can be set in the HDE-200. But before one
adjusts the Diversity Delay setting, Enable Blend
must be checked and the Diversity Delay must be
fully ramped up (the main ECC display shows the
Diversity Delay at 100%).
Click Diversity Settings... to open the Diversity
Settings pop-up window. Fine tuning of the Diver-
sity Delay time can be done using this window,
but to accurately do this requires that either a pro-
fessional HD Radio receiver be used so that direct
correlation measurements can be used or so that
the receiver can be set to “Split Mode” where the
decoded HD Radio signal audio feeds one chan-
nel (typically, the left channel) while the received
analog broadcast audio feeds the other channel
(typically, the right channel).
Connect a dual-channel oscilloscope to the HD
Radio receiver audio outputs (while it is in
Split
Mode
) to accurately align the two signals visually
while “tweaking” the delay setting in the Diversity
Settings pop-up window.
Here are some tips to get you started:
1. Start with an initial setting of roughly seven
seconds. This setting is often associated with
a particular Exciter, so also refer to the HD
Radio Exciter’s manual about their recom-
mended Diversity Delay.
2. Use program material with plenty of peaks
and silence (like spoken word) instead of
music so that the delay or time difference
between the two signals is most easily seen.
3. Progressively “zoom in” the scope as the two
signals are more closely aligned.
Delay Trim
The current Diversity Delay time (Absolute Di-
versity Delay) is shown in the Delay Trim section
of the window in seconds (the default setting each
time the window is opened) or in the number of
audio samples the signal is being delayed (each
Diversity Settings Window
Delay Control Menu Items