Revision F • 3/12
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4 Using the HDE-200
4.2.1 AUDIO METERING
One of the main ECC app uses is to allow the
audio levels for both the analog carrier and the
HD Radio signal to be shown in the HDE-200.
The top meter (Analog Main Delay Service)
shows the audio levels for the Main Delay Input
(Pre Delay) or the Diversity delayed signal (Post
Delay). This audio signal’s ultimate destination is
the analog exciter/transmitter.
The bottom meter (Digital Main Program Ser-
vice) displays the audio levels for the MPS Audio
Input (Pre Delay) or the audio going to the iBiq-
uity DSP board (Post Delay). There is no meter
display of the iBiquity DSP output since it’s an
Ethernet data stream feeding the HD Radio ex-
citer/transmitter.
4.2.1.1 Meter Source Selection
The source for each meter is in-
dependently selected by the two but-
tons to the left of the meters. The
blue highlighted button is the active
source. Pre Delay selects the audio input and Post
Delay selects the output audio for each meter. Click
the gray button to change the meter source.
The top, or
Analog Signal
meter, can show the
Pre Delay audio level (the audio as it enters the
HDE-200 on the
Main Delay Input jack) or the
Post Delay audio (the audio level as it exits the
HDE-200 on the
Main Delay Out jack). The Post
Delay signal may have no delay, a Diversity delay,
a Profanity delay or both Diversity and Profanity
delays, depending upon the current settings of the
HDE-200.
The bottom, or
Digital Signal
meter, when set
for Pre Delay, shows the AES digital audio signal
as it enters the HDE-200 on the
MPS Audio In-
put. If the HDE-200’s Active Input Source is set
for Main Input only, then this meter shows the
same signal as the upper meter. Post Delay shows
the audio level feeding the iBiquity HD Radio DSP
processor. This signal will only be delayed if the
optional Profanity delay is active, otherwise the
Pre and Post Delay metering is identical in time.
4.2.1.2 Audio Levels
Each meter displays both the average signal level
(shown as a bar) and a peak level indication
(shown as a moving single segment typically six -
ten dB above the top of the average level, depend-
ECC App, Main Window
Menu Items
HDE-200 Status
Indicators
Analog Broadcast
Audio Signal Level
Diversity Delay Status
& Ramp Controls
HD Radio Audio
Signal level
Meter Source Selectors
(Pre or Post Delay)
Name of the active HDE-200
