MULTIPLEXER COMMON ELECTRONICS SETUP PROCEDURES.

T.O. 31W2-2GSC24-2

TM 11-5805-688-14-1

NAVELEX 0967-LP-545-3010

2. If the OUTPUT

INTERFACE BAL block is

NOTE

marked, set switches S2A,

S2B, S2C, S2D, S8A, S8B,

S8C, and S8D to the B

position. If the OUTPUT

The computed KRp/3 value must

INTERFACE U75 or 6K

block is marked, set the

exactly match one of the six settings

switches to the U position.

of S5. If a match is not obtained, a

check of the computation is

3. Set both jumpers of switch S7 to the N

suggested. A correct computation

(normal) or R (reversed) position as indicated in the

not yielding a match with one of the

DATA N or R block on the worksheet.

settings of S5 indicates incorrect

configuration data on the worksheet.

4. Set both jumpers of switch S1 to the N

(normal) or R (reversed) position as indicated in the

6. Set S9 to the channel data rate listed on the

TIMING N or R block on the worksheet.

worksheet. This completes the setup of the TE/TR card

for the TR mode of operation.

5. Set S3 to the 0 position.

7. Install the TE/TR card in the appropriate slot

6. Refer to the TIMING section on the worksheet,

(1 through 15) in the MULTIPLEXER row.

and note which TIMING SOURCE block (INT or EXT) is

marked. Set S5 to the indicated position. If S5 is set to

3-71. VE CARD (P/N 61864070). No setup of the VE

the EXT position, proceed to step 14.

card is required. Install a VE card in the appropriate slot

in the MULTIPLEXER row for each voice channel input

NOTE

listed on the worksheet.

Row 1 of table 3-4 is applicable only

3-72. MULTIPLEXER COMMON ELECTRONICS

to the RT card fitted with an oscillator

SETUP PROCEDURES.

whose output frequency is 9, 830, 400

Hz. In such cases, proceed to step 7.

3-73. Procedures for configuring the cards comprising

When an oscillator of a different

the common electronics portion of the multiplexer are

frequency is used, and the desired Ro

prescribed in paragraphs 3-74 through 3-77.

The

value appears in other than row 1 of

information necessary to perform these procedures is

table 3-4, perform the procedures in

contained on sheet 2 of the configuration worksheets

(figure 3-11).

steps 8, 9, and 10. If the desired Ro

value is not listed in table 3-4,

3-74. RT CARD (P/N 61864150). The RT card is

perform the procedures in steps 11

located in slot 16 of the MULTIPLEXER row. Set up the

and 12.

card as follows (refer to figure 3-14 for all switch

locations):

7. Refer to row 1 of table 3-4, and locate the

output rate (Ro) value entered on sheet 2 of the

1. Refer to the OUTPUT INTERFACE BAL, U75,

worksheets. Set S6 on the RT card to the position

and U6K block on sheet 2 of the configuration

corresponding to the column of table 3-4 in which the

worksheets, and set switches S2E and S8E to the

desired Ro value appears. Proceed to step 13.

indicated position.

3-37