MSK Modem
13
MX809
6.3 Modem Timing Information
Figure 4: Modem Timing
Notes:
1. The SYNC and SYNC detector searches the incoming bit stream starting at the end of the byte in which
SYNC/SYNC Prime was set.
2. After detection of a SYNC/SYNC word, the SYNC/SYNC Prime bits automatically go low (control bits 5
and 6: detector off.
3. The checksum checker is inhibited during the time SYNC/SYNC search is operating.
4. The Status Register will indicate whether SYNC or SYNC was detected here.
5. Any number of preamble bits can occur here.
6. Any number of bits can occur here.
7. RX Freeformat set high.
ꢀ1998 MX-COM, Inc.
www.mxcom.com Tel: 800 638 5577 336 744 5050 Fax: 336 744 5054
Doc. # 20480036.004
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