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Field Service Ver. 7.0 Jan. 2009
2. COMMUNICATION CONTROL
4
5
FK-502/Network Fax
OUTLINE
H. Others
(1) Minimum reception signal level (RLSD) (half-duplex mode only)
• The reception circuit is turned to On when the signal becomes 43 dBm or more
• When the signal becomes 48 dBm or less, the reception circuit is turned Off within 20 to
25ms after it has exceeded the thresh old.
(2) Data frame structure
• All data transmitted in V.34 (after the Phase 4) is treated in the following frame format.
J
:The number of data frames within one super frame
P
:The number of mapping frames within one data frame
Modulation Speed
J
P
2400 baud
7
12
2743 baud
8
12
2800 baud
7
14
3000 baud
7
15
3200 baud
7
16
3429 baud
8
15
Super frame
Data frame
Mapping frame
Four-dimensional symbol
280ms
0
1
...
J-1
0
1
...
P-1
J=0
3
1
2
K=0
1
40 or 35ms
Y104784-2 Service Manual
Summary of Contents for FK-502
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