Telos Zephyr Xstream - Manual (Page 190)

USER’S MANUAL
Section 10: APPLICATIONS GUIDE 178
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HOT TIP!
The Sample Rate and Bit Rate must be matched for the auto mode to detect the incoming bit
stream.
Certain conventions are used which it will help to understand:
64 ‐This is a Zephyr Xstream Transmit mode that requires only a single B channel to operate.
The actual bit rate of that channel could be either 56 or 64 kbps.
128 ‐ This is a Zephyr Xstream Transmit mode that requires two B channels to operate. The
actual bit rate of those channels could be either 56 kbps (for a total of 112 kbps) or 64 kbps (for
a total of 128 kbps)
Dual/Mono ‐ This is simply a special case of Mono 64. In the Dual/Mono case the A audio source
is sent over "Line 1" while the B audio source is sent over "Line 2".
J‐Stereo ‐ This is "Joint Stereo" and is the preferred stereo mode in most cases. The biggest
exception is when stereo material will later be transmitted over a surround sound transmission
system (i.e. for Video or Film production) in which case the Stereo mode should be used. All
stereo modes require 2 B channels (2 calls) unless otherwise stated.
J‐Stereo 64 ‐ This mode, unique to AAC, is the only stereo transmission mode that does not
require 2 B channels.
L2 Half 64 ‐ This is a special Layer‐2 mode that operates at 24 kHz sample rate. The audio will be
transmitted at 24 kHz sample rate regardless of the actual sample rate selected in the CODEC
menu.
The following pages show the correct Xstream “receive” settings for various codecs: