Brother International DCP1000 Service Manual - Page 169

WSW23, Communications

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WSW23 (Communications setting) Selector No. Function Setting and Specifications 1 Starting point of training check (TCF) 0: From the head of a series of zeros 1: From any arbitrary point 2 Allowable training error rate 3 No. 2 3 00 : 01 : 10 : 11 : 0% 0.5% 1% 2% No. 4 5 4 Decoding error rate for transmission of RTN 5 0 0 : 16% 0 1 . 14% 1 0 : 10% . . 1 1 : 8% , 6 7 Not used. . . , 8 Limitation of attenuation level 0: Yes 1: No NOTE: Selector 8 is not applicable to the French versions. • Selector 1: Starting point of training check (TCF) At the training phase of receiving operation, the called station detects for 1.0 second a training check (TCF) command, a series of zeros which is sent from the calling station for 1.5 seconds to verify training and give the first indication of the acceptability of the line. This selector sets the starting point from which the called station should start counting those zeros. If this selector is set to "0," the called station starts counting zeros 100 ms after the head of a series of zeros is detected. If it is set to "1," the called station starts counting zeros upon detection of 10-ms successive zeros 50 ms after the head of a series of zeros is detected. In this case, if the detection of 10-ms successive zeros is too late, the data counting period will become less than 1.0 second, making the called station judge the line condition unacceptable. • Selectors 2 and 3: Allowable training error rate The called station checks a series of zeros gathered in training (as described in Selector 1) according to the allowable training error rate set by these selectors. If the called station judges the line condition to be accepted, it responds with CFR; if not, it responds with FTT. • Selectors 4 and 5: Decoding error rate for transmission of RTN The facsimile equipment checks the actual decoding errors and then transmits an RTN according to the decoding error rate (Number of lines containing an error per page - Total number of lines per page) set by these selectors. • Selector 8: Limitation of attenuation level Setting this selector to "0" limits the transmitting level of the modem to 10 dB. This setting has priority over the settings selected by WSW02 (selectors 5 through 8) and WSW13 (selectors 5 through 8). 26

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WSW23
(Communications
setting)
Selector
No.
Function
Setting
and
Specifications
Starting
point
of
training
check
0:
From
the
head
of
a
series
of
zeros
1
(TCF)
1:
From
any
arbitrary
point
No.
2
3
2
0 0
:
0%
Allowable
training
error
rate
0
1
:
0.5%
3
1
0
:
1%
1 1
:
2%
No.
4
5
4
0 0
:
16%
Decoding
error
rate
for
transmission
of
RTN
0
1
.
14%
5
1
0
:
10%
.
.
1 1
:
8%
,
6
7
.
Not
used.
.
,
8
Limitation
of
attenuation
level
0:
Yes
1:
No
NOTE:
Selector
8
is
not
applicable
to
the
French
versions.
•
Selector
1:
Starting
point
of
training
check
(TCF)
At
the
training
phase
of
receiving
operation,
the
called
station
detects
for
1.0
second
a
training
check
(TCF)
command,
a
series
of
zeros
which
is
sent
from
the
calling
station
for
1.5
seconds
to
verify
training
and
give
the
first
indication
of
the
acceptability
of
the
line.
This
selector
sets
the
starting
point
from
which
the
called
station
should
start
counting
those zeros.
If
this
selector
is
set
to
"0,"
the
called
station
starts
counting
zeros
100
ms
after
the
head
of
a
series
of
zeros
is
detected.
If
it
is
set
to
"1,"
the
called
station
starts
counting
zeros
upon
detection
of
10
-ms
successive
zeros
50
ms
after
the
head
of
a
series
of
zeros
is
detected.
In
this
case,
if
the
detection
of
10
-ms
successive
zeros
is
too
late,
the
data
counting
period
will
become
less
than
1.0
second,
making
the
called
station
judge
the
line
condition
unacceptable.
•
Selectors
2
and
3:
Allowable
training
error
rate
The
called
station
checks
a
series
of
zeros
gathered
in
training
(as
described
in
Selector
1)
according
to
the
allowable
training
error
rate
set
by
these
selectors.
If
the
called
station
judges
the
line
condition
to
be
accepted,
it
responds
with
CFR;
if
not,
it
responds
with
FTT.
•
Selectors
4
and
5:
Decoding
error
rate
for
transmission
of
RTN
The
facsimile
equipment
checks
the
actual
decoding
errors
and
then
transmits
an
RTN
according
to
the
decoding
error
rate
(Number
of
lines
containing
an
error
per
page
-
Total
number
of
lines
per
page)
set
by
these
selectors.
•
Selector
8:
Limitation
of
attenuation
level
Setting
this
selector
to
"0"
limits
the
transmitting
level
of
the
modem
to
10
dB.
This
setting
has
priority
over
the
settings
selected
by
WSW02
(selectors
5
through
8)
and
WSW13
(selectors
5
through
8).
26