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The
<Jitter>
field indicates the highest jitter peak measured for this
connection; it is a network impairment indication. Jitter is a time measurement in
milliseconds and gives indication about instant changes of the streaming delay;
low jitter usually indicates an optimal network performance.
Quantum’s streaming buffer takes care about this network impairment
automatically.
Some remarks about jitter:
1.
Some milliseconds of jitter are unavoidable for any streaming network.
2.
Large jitter peaks over >200ms could mean a poor network performance,
depending of the type of connection.
3.
The jitter peaks adds additional delay to the streaming delay.
11
The
<Roundtrip>
field shows the time, in milliseconds, that a packet takes to
go from the transmitter to the receiver, and back.
<Tx Kbps>
and
<Rx Kbps>
show the bit rate of the transmitted and received
streams. These values are interesting in the 3G/4G and Custom communications
to know how the stream is divided into the several interfaces.
IV.4.4
3G/4G monitor screen
This monitor screen shows information about the 3G/4G connections available on
the unit:
Network Provider.
Percentage of signal strength. This information is useful to estimate the
quality of the link.
Status of the connection: Connected is the only status that allows the
system to stream audio over that 3G/4G data link. Any other status will
indicate that the unit is either trying to register in the 3G/4G network or
trying to connect to that link. NOTE: Please bear in mind that most of
times, when the 3G/4G connection cannot be establish and the
corresponding row in the 3G/4G monitor table shows the word registering
11
The overall communication delay, encoder
decoder, is build up by the encoding delay plus
the buffer depth. The buffer depth in turn is related to the maximum jitter.
