Figure 5-4. Channel Data Asynchronous-to-Synchronous Conversion Functional Block Diagram

T.O. 31W2-2GSC24-2

TM 11-5805-688-14-1

NAVELEX 0967-LP-545-3011

6186-55

variations. Compensation is accomplished by a stuffing

offset between the counters has increased or decreased

process, which is discussed in detail in paragraph 5-48.

or remains unchanged since the previous rate

Since the stuffing operation is actually accomplished by

comparison was performed.

The results of the

the channel card buffering function described in

determination are passed to the common electronics

paragraph 5-32, a preliminary discussion is in order.

section in the form of a stuff request.

Referring to figure 5-4, it can be seen that the outputs of

the channel card input and output counters are routed to

5-36

The overhead servicing portion of the common

a counter comparator. Under control of a rate compare

electronics section receives the request, and at a

enable signal generated by the common electronics

predetermined time in the overall multiplexer operating

section, the comparator determines if the pre-established

5-9