Service manual

INSTALLATION
2-8
Month 2000
Part No. 001-2004-601
2. A separate RS-232 serial link can be used.
Figure 2-10 MAC DIP SWITCH SETTINGS
FOR RS-232 LINK
3. The FSK data can be sent over the voice link using
a Blank and Burst technique. No separate data link
is then required.
Figure 2-11 MAC DIP SWITCH SETTINGS
FOR BLANK AND BURST LINK
Select the type of link being used, refer to Figure
2-8 and 2-4 and make the connections to terminals 1-2
and 3-4.
Figure 2-12 LTR-Net VOICE/DATA LINK
2.12 RANGE/BANDWITH INDICATOR RESIS-
TORS
Zero ohm resistors R311-R318 on the receiver
board are used for identification of the frequency
range and bandwidth only. If R311/R312 are both
installed, this indicates that parts for both IFs are
installed and either one can be selected using jumpers
on J203, J204 and J205 (see Sections 6.1.4 and 6.1.5).
One zero ohm resistor (R313-R318) is used to indicate
the frequency range.
Figure 2-13 INDICATOR RESISTORS
O
N
2
1
8
7
6
5
4
3
O
N
2
1
4
3
R
X
S
-
(
G
N
D
)
R
X
S
-
R
X
S
+
(
A
U
D
I
O
)
R
X
S
+
(
F
S
K
)
R
X
S
-
(
G
N
D
)
TX
S
-
T
X
S
+
(
A
U
D
I
O
)
T
X
S
+
(
F
S
K
)
S
1
0
0
S
1
0
1
FS
K
T
X
S
+
O
N
2
1
8
7
6
5
4
3
O
N
2
1
4
3
R
XS
-
(
G
N
D)
R
X
S
-
R
X
S
+
(
A
UD
I
O
)
R
X
S
+
(
F
S
K
)
R
XS
-
(
GN
D
)
T
X
S
-
TX
S
+
(
A
U
DI
O
)
T
X
S
+
(
F
S
K
)
S
1
0
0
S
1
0
1
F
S
K
T
X
S
+
P1-64
P1-63
J2-4
J2-3
P1-32
P1-31
J2-2
J2-1
TxA+
TxA-
RxA-
RxA+
RxA+
RxA-
TxA-
TxA+
PRIMARY
RxA
PRIMARY
TxA
VOICE LINK CONNECTIONS
DATA LINK CONNECTIONS
RxA
TxA
RxS+
RxS-
TxS+
TxS-
RxS+
RxS-
TxS+
TxS-
SECONDARY
SECONDARY
J2-13
J2-14
J2-15
J2-16
P1-27
P1-28
P1-59
P1-60
SWITCH
LTR-Net
REPEATER
SWITCH
LTR-Net
REPEATER
R313
R314
R315
R316
R317
R318
R312
R311
IF 25 kHz
IF 12.5 kHz
RANGE 1
RANGE 2
RANGE 3
RANGE 4
RANGE 5
RANGE 6