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DCD SENSE
The TH-D7A(G) provides three methods for inhibiting the
built-in TNC from transmitting. Access Menu 1–4–2
(DCD SENSE) and select one of the methods. The
default is "
OR
BAND". Refer to page 55 on the
other instruction manual (original). The tables below
conclude when the TNC is allowed to transmit,
depending on the selection.
M
e
u n
1
4 –
2 –
A
D
o
e
s
p
e r
s
e
O
R
B
A
N
D
h t
s i
m
d
a
a t
D
o
s e
p
e r
e s
m
e
h t
B
O
T
H
B
A
N
D
S
o c
m
m
a
n
d
d
b
a
n
. d
T
a r
n
s
p
e r
s
e
I
G
N
O
R
E
D
C
D
h t
s i
m
f o
e t
n
c
o
n
s
a t
28
r o
B
S
e
e l
t c
d e
f
r o
D
a
a t
B
a
n
o
t t
a r
n
s
m
t i
w
h
e
n
s
g i
n
a
t n
o
n
h t
e
d
a
a t
b
a
n
. d
S
e
e
h t
o
d
w
h
e
n
m
a
n i
y l
p
e
f r
r o
c
o
m
m
u
n
c i
t a
o i
n
. s
n
o
t t
a r
s n
m
t i
w
h
e
n
s
g i
n
a
s l
t n
o
n
b
a
n
d
A
r o
. B
S
e
e l
t c
o
d
w
h
e
n
p
e
f r
r o
m
n i
g
v
i o
e c
u
i n
a c
o i t
s n
o
n
h t
e
m
a
n i
b
a
a t
o c
m
m
u
i n
a c
o i t
s n
o
n
h t
m
s t i
e
v
e
n
w
h
e
n
s
g i
n
a
s l
t n
o
n
h t
e
d
a
a t
b
a
n
. d
S
e
e
h t
o
d
o
n
y l
w
h
e
n
h t
e
T
N
a f
s l i
o t
t
a r
n
s
m
t i
b
e
c
a
u
s
e
t n
d
a
a t
e r
c
e
t p
o i
. n
M
e
u n
1
4 –
O
R
B
d n
B
O
T
H
B
A
s l
a
e r
e l
t c
m
n i
g
I
G
N
O
R
E
D
a
e r
h t
s i
a
n
, d
e
u s
b
Note: When in APRS mode, the TNC functions exactly as described in
the tables. The TNC, however, does not function as described in the
shaded sections when in Packet mode or KISS mode; it functions as
a
e r
below. Avoid using the shaded configurations when in one of these
modes.
e l
t c
Packet mode:
C
f o
The TNC fails to receive an acknowledgment after transmitting. It then
makes retries and unexpectedly disconnects the linkage.
KISS mode:
The TNC transmits when no signals are present on the data band or data
RX band.
2 –
: A
X T
B
R :
X
r o
A
R :
X
: B
X T
D
o
e
s
n
o
t t
a r
n
s
m
t i
p
e r
s
e
t n
o
n
h t
e
d
a
h t
s i
m
e
h t
o
d
w
h
e
n
A
N
D
c
o
m
m
u
n
c i
t a
o i
n
s
v
o
d r
n i
a
y r
c
o r
s s
b -
a
n
c
o
m
m
u
n
c i
t a
o i
n
. s
D
o
s e
n
o
t t
a r
s n
m
t i
p
e r
e s
t n
o
n
h t
e
d
a
a t
N
D
S
S
e
e l
t c
h t
s i
m
e
h t
o
d
o
d r
n i
a
y r
c
o r
s s
b -
a
n
c
o
m
m
u
n
c i
t a
o i
n
. s
T
a r
n
s
m
s t i
e
v
e
n
w
p
e r
s
e
t n
o
n
h t
e
d
a
C
D
S
e
e l
t c
h t
s i
m
e
h t
o
d
d
a
a t
c
o
m
m
u
n
c i
t a
o i
a
n
d
o
n
y l
w
h
e
n
n
e
S
l e
c e
e t
f d
r o
D
a
a t
a B
d n
w
h
e
n
s
g i
n
a
s l
a
e r
a t
T
X
b
a
n
. d
S
e
e l
t c
p
e
f r
r o
m
n i
g
d
a
a t
a i
a
P
A
C
S
A
T
r o
d
d
a
a t
w
h
e
n
s
g i
n
a
s l
a
e r
R
X
r o
T
X
b
a
n
. d
w
h
e
n
p
e
f r
r o
m
n i
g
d
d
a
a t
h
e
n
s
g i
n
a
s l
a
e r
a t
R
X
r o
T
X
b
a
n
. d
w
h
e
n
p
e
f r
r o
m
n i
g
n
s
v
a i
a
P
A
C
S
A
T
c
e
s s
r a
. y
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