Sharp MX-FXX1 Service Manual page 55

SW Bit
Item
No. No.
87 6 V.33 carrier frequency
7-8 V17/V33/V29/
V27terTCF reception
judgment EQM
threshold values
88 1-2 Primary channel foul
back EQM threshold
value at times of V.34
reception
3-8 Not used
89 1-4 Symbol speed
selection threshold 1
(Allowable range for
telephone line
characteristics
distortion level)
5-8 Symbol speed
selection threshold 2
(Minimum S/N
allowable range level)
90 1-4 Primary channel
communication speed
selection threshold
value
5-8 High speed CD OFF
fixing time
91 1-2 LVCS monitoring cycle
SW selection and function
Set during configuration of the V.33 mode. Carrier frequency in the V.33
mode.
"0": 1800Hz
"1": 1700Hz
Threshold value for returning FTT or CFR; return FTT when the setting
here is exceeded.
"00": 0x20
"01": 0x40
"10": 0x58
"11": 0x7f
If the set value in this setting is exceeded, the speed in the following
phase C is decreased.
"00": 0x20
"01": 0x40
"10": 0x58
"11": 0x7f
This factor determines which symbol rate is selected with respect to the
line distortion measured in line probing.
The characteristic is such that the smaller the value is, the lower the
symbol rate is set.
Setting can be made over the range of 0 (-6dB) to 15 (+6dB) in -1dB
increments by binary inputting (see below).
1: -6dBm, 2: -6dBm
3 - 14: -5dBm - 4dBm (1dBm increments)
13: 5dBm
14: 6dBm, 15: 6dBm
This factor determines which symbol rate is selected with respect to the
S/N measured in line probing.
The characteristic is such that the larger the value is, the lower the
symbol rate is set
Setting can be made over the range of 0 (-6dBm) to 15 (+6dBm) in
-1dBm increments by binary inputting (see below).
1: -6dBm, 2: -6dBm
3 - 14: -5dBm - 4dBm (1dBm increments)
13: 5dBm
14: 6dBm, 15: 6dBm
This sets the standard for determining speed in Phase-C by line probing
in Phase 2. -8dBm: Judgment becomes loose (easy to select high
speed), +7dBm: Judgment becomes harsh (difficult to select high
speed).
Setting can be made over the range of 0 (-8dBm) to 15 (+7dBm) in
1dBm increments by binary inputting.
This is used for looping when it is not possible to detect the end of RCP
and other high-speed signals during high-speed reception in the V.34
ECM mode.
Setting can be made over the range of 0 (150ms) to 15 (1650ms) in
100ms increments by binary inputting.
This is the cycle over which the resistor LVCS, which displays the line
current, is monitored.
When LVCS=0, the speaker is muted to prevent the abnormal sound.
"00": Do not monitor
"01": 10ms
"10": 20ms
"11": 30ms
MX-FXX1 SIMULATIONS, FAX SOFTWARE SWITCH 5 – 46
Initial value
0 1800Hz
1 0x58
0
1 0x58
0
1
1
0
1
0
0
0 -3.0dBm
1
0
1
1 0.0dBm
0
0
0
1 0.0dBm
0
0
0
0 150ms (North America/
Australia/Norway/
0
Switcherland/Austria/New
0
Zealand/China/Singapore/
0
Indonesia/Thailand/
Malaysia/India/Philippine/
Hong Kong/Taiwan/Middle
East/Other3)
0 350ms (U.K./France/
Germany/Sweden/
0
Finland/Denmark/
1
Netherlands/Italy/
0
Slovakia/Rusia/South
Africa/Spain/Portuguese/
Luxemburg/Belgium/
Czech/Hungary/Greece/
Poland)
1 20ms
0
System
settings