PTX-LCD
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User Manual
Rev. 2.3 - 18/07/07
Both the attenuation and the increase that IAMLC is allowed to introduce, have limits
that can be set by the user.
The elements of this menu are the following:
IAMLC
Enable or disable the function
Mod
Minimum and maximum thresholds for the intervention of IAMLC
Ist
Intervention time related to the minimum and maximum thresholds
Att
Maximum attenuation and increase IAMLC is allowed to introduce
The following table suggests the settings of this function for different kinds of
radio programs
m
a
r
g
o
r
P
o
i
d
a
R
n
i
M
d
o
M
x
a
M
d
o
M
n
i
M
t
sI
x
a
M
t
sI
n
i
M
tt
A
x
a
M
tt
A
e
c
n
a
D
%
5
7
%
0
0
1
s
0
1
s
1
m
B
d
3
-
m
B
d
6
+
k
c
o
r
,
p
o
P
%
0
3
%
0
0
1
s
0
2
s
5
,
0
m
B
d
3
-
m
B
d
6
+
c
i
n
o
rt
c
e
l
E
%
0
5
%
0
0
1
s
0
1
s
5
,
1
m
B
d
3
-
m
B
d
3
+
z
z
a
J
%
0
4
%
0
0
1
s
5
s
5
,
0
m
B
d
3
-
m
B
d
6
+
l
a
c
i
s
s
a
l
C
%
0
2
%
2
9
s
0
3
s
5
,
0
m
B
d
4
-
m
B
d
0
1
+
w
o
h
s
kl
a
T
%
0
4
%
5
8
s
0
3
s
1
m
B
d
3
-
m
B
d
4
1
+
The best results with this function will be obtained investing some time in
experimentation with your own radio programs:
use the man MODPK to check your average modulation level. Adjust the input
level from the main menu so that the average modulation level is the nearest
to 100%.
Set the IAMLC parameters as suggested by the table, and adjust them so that
the function is not activated too often. Consider the fact that the intervention of
the function stops when the average modulation level goes between the
minimum and maximum thresholds.
The use of the clipper circuit (BdSet menu) helps in the limitation of the
modulation peaks above 100%, though introducing a certain aomunt of distorion.
Think about your possible need for this function, depending on your radio
program. it aiuta a limitare i picchi superiori al 100 % di modulazione,
introducendo però una certa quantità di distorsione. Valutare la necessità di
questo limitatore in funzione del proprio programma musicale.
Figure 7.26 shows an example of modulation level evolution when the IAMLC
function is activated.
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