EFJohnson 3000 SERIES - Manual (Page 166)

MULTI-NET CONSOLE MODULE (MCM)
20-2
20.2 MCM SETUP PROCEDURE
20.2.1 SWITCH SETTINGS
Refer to Figure 20-2 for Alignment Points
Diagram.
Command and Control Communication
The command and control communication to the
Consoles takes place on a digital RS-232 link at 9600
baud. The digital link occurs on the Secondary lines.
20.2.2 MCM JUMPER PLACEMENT
20.2.3 MCM BACKPLANE EXTERNAL CON-
TACTS
See the Backplane Section 23 for pinouts on the
shelf backplane and wire harness pinouts.
20.3 MCM ALIGNMENT SPECIFICATION
20.3.1 PRE-ALIGNMENT
The MCM is pre-aligned with the Basic Board
Module alignment procedures, refer to Section 8.3.
1. Main Rx Audio Level From J1.
a. Setup for alignment, input 1004 Hz tone at
-12 dBm into J1 EQU.
b. Set S5 for Test 1 (open section 1, close 2, 3 and 4).
c. Reset the module, Press S2 and release.
d. Adjust R41 to -6 dBm
± 0.5 dB at J11.
e. Verify that the level at TP5 is -6 dBm
± 1 dB.
6. Main Tx Audio Output Level From J1.
a. Setup for alignment as in Step 1.
b. Adjust R83 for a -3 dBm
± 0.5 dB level at TP3.
c. Adjust R44 for a -12 dBm ± 0.5 dB level at J12.
Table 20-1 MCM SWITCH SETTINGS
Switch Open Sections Close Sections
S1
S3
S4
S5
1
1
-
-
2
2
-
-
-
-
3
-
4
-
4
-
-
-
1
1
-
-
2
2
3
3
-
3
-
4
-
4
Table 20-2 MCM JUMPER PLACEMENT
JU Pin Description
J24 1 to 2*
2 to 3 Selects 27512 EPROM operation
Selects 27256 EPROM operation
J27 1 to 2
2 to 3* Not used
Normal audio
P33 1 to 2*
3 to 4*
5
6 No personality card attached
No personality card attached
open
open
J36 1 only*
1 to 2
2 to 3 Not used
-48V E-lead operation
-15V E-lead operation
J14
J15
J21
J22 Jumper pin 1 to 2 for high impedance ground path
for split 600 ohm inputs and outputs. Leave open if
no ground path desired.
*Setting for Normal operation.
Table 20-3 BACKPLANE PINOUTS
Backplane
P34 to P45
Description
Wire Harness
J1,3,5,7
pin 27
pin 28
pin 29
pin 30
pin 31
pin 32 Sec Rx +
Sec Rx -
EA lead
EB lead
Pri Rx Audio+
Pri Rx Audio- pin 1
pin 2
pin 3
pin 4
pin 5
pin 6 Signal
Ground
RX+
RX-
J2,4,6,8
pin 59
pin 60
pin 61
pin 62
pin 63
pin 64 Sec Tx +
Sec Tx -
MA lead
MB lead
Pri Tx Audio+
Pri Tx Audio- Signal
Ground
Unsel Tx+
Unsel Tx-
Select Tx+
Select Tx- pin 1
pin 2
pin 3
pin 4
pin 5
pin 6