Brother mfc8440 Service Manual page 339

APPENDIX 3 FIRMWARE SWITCHS (WSW)
Selector
No.
1
2
3
|
8
NOTE:
•
WSW40 takes effect only in the V. 34 mode.
• Selector 2 is applicable only to models equipped with a flat-bed scanner.
l
Selectors 3 and 8: Masking of symbol rate(s)
These selectors allow you to limit the transmission speed range in the V. 34 mode by
masking the desired symbol rate(s). Transmission speeds assigned to the symbol rates are
listed below. The setting made by these selectors will limit the setting made by selectors 1
through 4 of WSW39.
If selector 3 is set to "1" to mask the 3429 symbols/second when the first transmission speed
choice is 33600 bps (specified by selectors 1 through 4 of WSW39), for example, the
allowable maximum transmission speed will be limited to 31200 bps. If selector 8 is set to "1"
to mask the 2400 symbols/second when the first transmission speed choice is 33600 bps,
then the allowable maximum transmission speed remains 33600 bps.
If selector 8 is set to "1" to mask the 2400 symbols/second when the first transmission speed
choice is 21600 bps (specified by selectors 1 through 4 of WSW39), the allowable maximum
transmission speed remains 21600 bps but the minimum transmission speed will be limited
to 4800 bps.
Symbol rate
2400
2800
WSW40 (Function setting 18)
Function
Not used.
Not used.
Masking of symbol rate(s)
Transmission speed
(bps)
2400
4800
7200
9600
12000
14400
16800
19200
21600
4800
7200
9600
12000
14400
16800
19200
21600
24000
26400
Not masking Masking
No. 3
No. 4
No. 5
No. 6
No. 7
No. 8
Symbol rate Transmission speed
(bps)
3000 4800
7200
9600
12000
14400
16800
19200
21600
24000
26400
28800
3200 4800
7200
9600
12000
14400
16800
19200
21600
24000
26400
28800
31200
A-42
Setting and Specifications
0 1 3429 symbols/sec
0 1 3200 symbols/sec
0 1 3000 symbols/sec
0 1 2800 symbols/sec
- - Not used.
0 1 2400 symbols/sec
Symbol rate Transmission speed
3429
(bps)
4800
7200
9600
12000
14400
16800
19200
21600
24000
28800
31200
33600