MULTI-NET CONSOLE MODULE (MCM)

20.2 MCM SETUP PROCEDURE

20.2.1 SWITCH SETTINGS

Refer to Figure 20-2for 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.

Table 20-1 MCM SWITCH SETTINGS

Switch

Open Sections

Close Sections

 

 

 

 

 

 

 

 

 

 

S1

1

2

-

4

-

-

3

-

S3

1

2

-

-

-

-

3

4

S4

-

-

3

4

1

2

-

-

S5

-

-

-

-

1

2

3

4

 

 

 

 

 

 

 

 

 

20.2.3MCM BACKPLANE EXTERNAL CON- TACTS

See the Backplane Section 23 for pinouts on the shelf backplane and wire harness pinouts.

Table 20-3 BACKPLANE PINOUTS

Backplane

Description

Wire Harness

P34 to P45

J1,3,5,7

 

 

 

 

 

pin 27

Sec Rx +

pin 1

Signal

pin 28

Sec Rx -

pin 2

Ground

pin 29

EA lead

pin 3

 

pin 30

EB lead

pin 4

 

pin 31

Pri Rx Audio+

pin 5

RX+

pin 32

Pri Rx Audio-

pin 6

RX-

 

 

J2,4,6,8

 

 

 

 

pin 59

Sec Tx +

Signal

pin 1

pin 60

Sec Tx -

Ground

pin 2

pin 61

MA lead

Unsel Tx+

pin 3

pin 62

MB lead

Unsel Tx-

pin 4

pin 63

Pri Tx Audio+

Select Tx+

pin 5

pin 64

Pri Tx Audio-

Select Tx-

pin 6

20.2.2 MCM JUMPER PLACEMENT

Table 20-2 MCM JUMPER PLACEMENT

JU

Pin

Description

 

 

 

J24

1 to 2*

Selects 27512 EPROM operation

 

2 to 3

Selects 27256 EPROM operation

J27

1 to 2

Not used

 

2 to 3*

Normal audio

P33

1 to 2*

No personality card attached

 

3 to 4*

No personality card attached

 

5

open

 

6

open

J36

1 only*

Not used

 

1 to 2

-48V E-lead operation

 

2 to 3

-15V E-lead operation

J14

Jumper pin 1 to 2 for high impedance ground path

J15

for split 600 ohm inputs and outputs. Leave open if

J21

no ground path desired.

J22

 

 

*Setting for Normal operation.

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.

20-2