Comtech EF Data SDM-9000 - Manual (Page 210)

Options SDM-9000 Satellite Modem
A–24 Rev. 4
An interleaved frame is generated by applying convolutional interleaving
(with depth I = 12) to the error-corrected packets.
Figure A-19 shows the interleaved frame structure.
SYNC 1
or
SYNC n
203 BYTES 203 BYTES
INTERLEAVING DEPTH I = 12
SYNC 1
or
SYNC n
Figure A-19. Interleaved Frame Structure
The interleaved frame is composed of overlapping error-protected packets delimited by
inverted or non-inverted MPEG-2 sync bytes, preserving the periodicity of 204 bytes.