3.6.3 Port Number
The port number is factory set at 2002.
3.6.4 MAC Address
Displays the unique MAC address of your particular AERO.lite.
3.6.5 SNMP Trap Address (1 & 2)
+H@EC2A '255C6DD6D42?36D6E2?52?J>6DD286DH:==36C6=2J65E@3@E9 '=62D6D66
D64E:@? 7@C56E2:=65*%$':?7@C>2E:@?
3.7 System Menu
Allows IP and I/O settings to be set back to factory defaults. These settings can be reset
individually or together by turning the menu knob to scroll through IP Comm, I/O, or All.
3.8 ITU-R BS.1770 Meter (Option)
The goal for most broadcasters today is to transmit a signal that pleases audiences and
is neither too loud nor too soft. If this is accomplished, and the transmitted loudness
matches the corresponding loudness metadata (called
dialnorm
in the Dolby Digital
encoder), compliant output can be achieved.
The ITU Meter Option is a simple utility ITU loudness meter used for calibrating the final
loudness of the AERO.lite. This meter and others like it are based on an international
standard developed to give an objective
estimation
of loudness levels, which are
normally very subjective.
ITU meters are not perfect. They get us closer to agreement, and as long as everyone
uses meters that comply with the BS.1770 standard, results can be much more
consistent world-wide.
Integration provides a running average of a certain times worth of audio samples. Longer
integration times give a better view of an entire program segment, with Infinite being the
best. However, an infinite integration must be reset after each segment, else the meter
becomes less sensitive to short term events that might occur and so is generally not a
practical choice for continuos metering. However, when used correctly it can be an ideal
choice and we provide a way to reset the meter via the front panel and a GPI control.
Very short integration times do not provide enough detail about the overall average for
longer program or commercial segments. The CRC in Canada determined that 3
seconds is about fastest useful integration time, but in practical terms for checking the
output of a station, it is probably still too fast. It will show variations quickly and tend to
result in overly dense processing settings.
The best results for continuous loudness monitoring will be obtained with 10-second or
30-second integration times. Known as “leaky integration” these settings provide a
continuous reset of the integrator. For the 10-second selection, samples that enter will
“leak out” the integrator after 10 seconds.
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