Service manual

INTRODUCTION
1-15
March 2000
Part No. 001-3139-502
Figure 1-21 CIM S5 ALIGNMENT TONE
3. In the CIM set S5 as shown in Figure 1-19 to
generate a 1200 Hz alignment tone over the voice
path.
4. Connect a Transmission Test Set to J12 and adjust
R86 for a level of
-20 dBm with LL/DC links or
-36 dBm with MW/T1 links.
5. On the MLM drawer connect a Transmission Test
Set to TP6 and adjust R47 for a meter reading of
-12 dBm.
6. 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.
(See Figure 1-23.)
7. On the MLM drawer connect a Transmission Test
Set to TP3 and adjust R38 for a meter reading of
-20 dBm for LL/DC links or
-36 dBm for MW/T1 links.
8. On the 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. (See Figure 1-24.)
1.3.7 VOICE LEVEL FROM SWITCH ALIGN-
MENT
1. In the MLM drawers set S2 as shown in Figure
1-22 and reset the MLM by pressing S8 momen-
tarily. This enables the Repeat gate, Logic Squelch
gate and the Transmitter.
Figure 1-22 MLM S2 GATE AND TRANSMIT
2. In the CIM set S5 as shown in Figure 1-21 to
generate an alignment tone.
3. In the CIM connect a transmission Test Set to J12
and adjust R44 for an average voice level of
-12 dBm with LL/DC links or
-28 dBm with MW/T1 links.
4. On the MLM connect a Transmission Test Set to
TP5 and adjust R32 for the level recorded in Section
1.3.2, Step 20. This is for 1.5 kHz of deviation out
of the transmitter.
Alignment is complete. Reselect the normal oper-
ating mode of all the cards involved in the
alignment.
1.4 VOTER ERROR MESSAGES
O
N
S5
2
1
4
3
MSB
LSB
1
2
4
8
Table 1-1 ERROR MESSAGES
Error Displayed
Error Description
CRVM MSG - Chnl: 1
Failed CDMs: 1.2
CRVM for Channel 1
Failed to Receive from
CDMs 1 and 2.
CRVMSTAT - Chnl: 2
RVM: 1 Fail
CRVM for Channel 2
Failed to Communicate
with the VDM
CRVM Msg - Chnl: 2
Data: 21 Failed RVMs: 6
CRVM for Channel 2 failed
to Receive from RVM 6 -
The Data: 21 (00100001)
indicates RVMs 1 and 6 are
enabled.
CRVM Msg - Chnl: 1
Failed RDMs: 1
CRVM for Channel 1 failed
to Receive from RDM 1
O
N
2
1
8
7
6
5
4
3
L
S
B
M
S
B
1
2
4
8
S2