CDP-LSA1, MDS-LSA1, STR-LSA1 - Sony Audio Service Manual (repair manual). Page 7

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(5)  Data type
Packet data communicated between devices consist of “Isochronous packet” with time restrictions in transmission and the “Asynchro-
nous packet” with no restrictions.
With the isochronous packet, data transmission is guaranteed to complete with every cycle signal. If the signal does not arrive within a
certain period of time, images and sounds will be interrupted. The data will not be resent even if communication error occurs.
The asynchronous packet is data such as commands, and is output while the isochronous packet is not sent. Since time restrictions are lax,
data can be resent when errors occur.
(Reference) Capacity of isochronous packet (Band width)
When sending video and audio signals (isochronous packet) simultaneously, signals exceeding bus capacity (100/200/400 Mbps) cannot
be sent. If the total capacity exceeds the bus capacity, the device displays an error message (Bus Full) and additional communication will not
be possible.
For example, when attempts are made to link to other devices from the STR-LSAI, if the band is full and no new links are possible, the
STR-LSAI displays “Bus Full”. In this case, the LINC of this STR-LSAI will not be established, but the existing LINCs will be preserved as
they are.
When the device sends signals by S100, the band in which the isochronous signal can be used with S100 is Approx. 80 Mbps. With S100,
the images of the DV device is about 35 Mbps while MPEG signals such as TV are 30 to 40 Mbps (Max. about 60 Mbps). The audio signal
is about 12 Mbps during high speed dubbing and about 3 Mbps during normal playback. However, when signals are sent by S200/S400, the
transfer speed will be about 2 times or 4 times.
Others
MPEG (S100)
Audio (S100)
Audio (S200)
Audio (S100)
Bus Full
limit
MPEG (S200)
Isochronous packet
Max. Approx. 80Mbps (S100)
Fig. 1-6. Capacity of Isochronous Packet
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