Service manual

ALIGNMENT AND TEST PROCEDURES
7-21
Month 2000
Part No. 001-2004-601
7.5.3 VOICE AUDIO TO SWITCH
1. On the MAC, set S100 and S101, all Sections OFF
(see Figure 7-19).
2. Connect an RF generator to the receiver.
3. Adjust the RF generator for 100 µV modulated with
a 1 kHz tone at ±1.5 kHz deviation.
4. Connect a balanced AC Voltmeter with a 600 ohm
input impedance between balanced lines RXA+ and
RXA- of J2 located on the back of the Repeater (see
Figure
7-16).
5. On the MAC, adjust R239 for the type of line used.
Leased Line/Direct Connect (default)
-12 dBm (194 mV RMS)
Microwave/T1 (optional)
-28 dBm (31 mV RMS)
7.5.4 VOICE AUDIO FROM SWITCH
1. On the MAC, set S100 and S101, all Sections OFF
(see Figure 7-19).
2. On the CIM (in the Switch) generate an alignment
tone (set S5 to "1") (see Figure
7-26).
3. On the CIM, connect a balanced AC voltmeter at
J12.
4. On the CIM, adjust R44 for the type of line used.
Leased Line/Direct Connect (default)
-12 dBm (194 mV RMS)
Microwave/T1 (optional)
-28 dBm (31 mV RMS)
5. On the MAC, adjust R243 for -6 dBm
(387 mV RMS) measured at J100/J103.
Figure 7-20 MAC SWITCH SETTINGS
7.5.5 BLANK AND BURST - FSK DATA FROM
SWITCH
1. On the MAC,
set S100 all Sections OFF
set S101, sections 2, 3, 4 OFF
set S101, section 1 ON (see Figure 7-20).
2. On the CIM, (in the Switch) generate an alignment
tone (set S5 to a value of "8").
3. On the CIM, adjust R86 at TP4 for the type of line
used.
Leased Line/Direct Connect (default)
-12 dBm (194 mV RMS)
Microwave/T1 (optional)
-28 dBm (31 mV RMS)
4. On the CIM, verify at J12 (see Figure 7-26).
Leased Line/Direct Connect (default)
-21 dBm (69 mV RMS)
Microwave/T1 (optional)
-37 dBm (11 mV RMS)
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
+
(
AU
D
I
O
)
R
X
S
+
(
FS
K
)
R
X
S
-
(
G
N
D)
T
X
S
-
T
X
S
+
(
AU
D
I
O
)
T
X
S
+
(
F
S
K
)
S
1
0
0
S
1
0
1
F
S
K
TX
S
+