NBSB CARD (P/N 61864160)

T.O. 31W2-2GSC24-2

TM 11-5805-688-14-1

NAVELEX 0967-LP-545-3010

fill bits the demultiplexer can process

marked with an X, a smoothing buffer

is 868. If the computed quantity of fill

(SB) card (P/N 61864090) is used.

bits exceeds this value, a check for

Procedures for SB card setup are

computational errors is suggested. A

presented in paragraph 3-80.

correctly computed fill bit value

greater than 868 is indicative of

1. Note the demultiplexer input rate (Ro) value entered

incorrect configuration data on the

on the worksheet. If Ro is less than 2000 bps, set S1 to

worksheet.

the RO < 2KHZ position. If Ro is 2000 bps or greater, set

S1 to the RO > 2KHZ position.

18. Refer to table 3-3, and locate the fill bit

quantity computed in step 17. Enter the 10-digit binary

2. Set S9 to the NORM position.

number associated with this quantity in the RATE

CONVERSION DATA block on sheet 3.

of the

3. Set S4 to the ON position.

worksheets.

NOTE

Setting S4 to the OFF position will

In step 19, ensure that the 10-digit

inhibit the display of any card errors

number is inserted properly and the 0

detected

the

NBSB

card

and 9 positions are not inadvertently

diagnostic circuits.

reversed.

Removal of all switch

jumpers prior to starting the number

4. Refer to the DATA N or R block on the worksheet,

entry process is suggested.

and set both jumpers of S10 to the indicated N (normal)

or R (reversed) position.

19. Set 10-digit switch S2 on the SB card to reflect the

10-digit binary number recorded on the worksheet. This

5. Refer to the TIMING N or R block of the worksheet

completes the SB card setup process.

and set both jumpers of S11 to the indicated N (normal)

or R (reversed) position,

20. Install the SB card in its appropriate slot (1 through

15) in the DEMULTIPLEXER row.

6. Refer to the INTERFACE BAL, U75, or U6K block of

the worksheet, and set S19 and S22 to the indicated B

3-81. NBSB CARD (P/N 61864160). For each channel

(balanced) U75 (unbalanced 75 ohms) or U6K

that uses an NBSB card, set up the card as follows (refer

(unbalanced 6K ohms) position.

to figure 3-18 for all switch locations):

7. If the INTERFACE BAL block of the worksheet is

NOTE

marked, set S14, S15, S16, S17, 518, S20, S21, and

S23 to the B position. If the INTERFACE U75 or U6K

NBSB cards are used for each

block is marked, set the switches to the U position.

channel marked with the letters NB in

the CARD TYPE SB block of sheet 3

8. Refer to the worksheet, and note the channel's output

of the worksheets. If the CARD TYPE

(data rate

block

3-48