Service manual
INTRODUCTION
1-14
March 2000
Part No. 001-3139-502
3. On the MLM drawer connect a Transmission Test
Set to TP3 and adjust R19 for a meter reading of
-12 dBm for LL/DC links or -28 dBm for MW/T1
links.
4. On the associated CIM connect a Transmission
Test Set to J11 and adjust R41 for a meter reading of
-6 dBm.
1.3.5 FSK RECEIVE DATA LEVEL FROM
SWITCH
1. In the MLM drawers set S2 switch as shown in Fig-
ure 1-18 and reset the MLM. This enables MODEM
U9 and the FSK gate.
Figure 1-18 MLM S2 MODEM/FSK GATES
2. Proceed according to the type of data path that was
selected:
Separate RS-232 Data Path
Separate 4-Wire FSK Data Path
FSK Data Over Voice Path
Separate RS-232 Data Path
If an RS-232 link is used, alignment is not
required. Reselect the normal operating mode in the
MLM drawer.
Separate 4-Wire FSK Data Path
1. In the CIM set S5 as shown in Figure 1-19 to gen-
erate the FSK alignment tone over the data path. At
the Switch, this tone will be at the average voice
level of -12 dBm with LL/DC links or -28 dBm with
MW/T1 links. (See Figure 1-24.)
Figure 1-19 CIM S5 FSK ALIGNMENT TONE
2. On the MLM drawer connect a Transmission Test
Set to TP6 and adjust R47 for a meter reading of
-12 dBm for LL/DC links or
-28 dBm for MW//T1 links.
3. In the MLM drawers set S2 as shown in Figure
1-20 and reset the MLM by pressing S8 momen-
tarily. This enables the transmitter.
Figure 1-20 MLM S2 TRANSMIT ENABLE
4. On the MLM drawer connect a Transmission Test
Set to TP1 and adjust R38 for a meter reading of
-12 dBm for LL/DC links or
-28 dBm for MW/T1 links.
5. On the associated CIM connect a Transmission
Test Set to TP8 and adjust R102 for a meter reading
of -12 dBm. This adjusts the Secondary Receive
level on the CIM.
1.3.6 FSK DATA OVER VOICE PATH
1. In the CIM set S5 as shown in Figure 1-21 to
generate the alignment tone.
2. Connect a Transmission Test Set to J12 and adjust
R44 for a meter reading of -12 dBm for LL/DC links
or -28 dBm for MW/T1 links.
O
N
2
1
8
7
6
5
4
3
L
S
B
M
S
B
1
2
4
8
S2
O
N
S5
2
1
4
3
MSB
LSB
1
2
4
8
O
N
2
1
8
7
6
5
4
3
L
S
B
M
S
B
1
2
4
8
S2