VOICE DATA.

T.O. 31W2-2GSC24-2

TM 11-5805-688-14-1

NAVELEX 0967-LP-545-3010

3-24.

Type II data processed by the transition

generated by the multiplexer set. Therefore, if the

encoding/decoding technique may occur at rates within

nominal input data rate is at the upper limit of the rate

six ranges as follows:

range selected, and positive variations in the input rate

are expected, it is best to select the next higher rate

0 - 75 bps

range.

Type II channel data processed by the

multiplexer using the transition encoding/decoding

0 - 100 bps

technique are supplied to the corresponding

demultiplexer channel output without associated timing.

0 - 150 bps

3-25. VOICE DATA.

0 - 200 bps

3-26. The multiplexer set will accept and process voice

0 - 300 bps

data at frequencies within the range of 300 to 3400 Hz.

Channel input/output impedance is 600 ohms(balanced).

0 - 400 bps

Full modulation occurs at a multiplexer input level of -16

dBm. The corresponding demultiplexer output level is +7

Upon entering the multiplexer set, data are processed by

dBm. Processing of voice channel input data requires

using a 3-bit transition encoding/decoding process. This

use of a KRp of 19.2 kbps or greater. A KRp of 38.4

process entails use of a KRp that is three times the

kbps is preferred for voice processing.

upper limit of the data rate range selected. For example,

a 75-bps channel rate input being processed with the 0to

3-27. CHANNEL CARD OPTIONS.

75-bps data rate range would require a KRp of 3 x 75 or

3-28. The channel input/output data forms discussed in

225 bps. It is not necessary that a given input data rate

paragraphs 3-19 through 3-26 are processed by means

be processed with only the lowest rate range in which it

of a variety of optional multiplexer and demultiplexer

falls. A lower input rate may be processed with any rate

channel cards. In appropriate combinations, the cards

range whose upper limit is higher than the applied input

are plugged into multiplexer and demultiplexer card slots

rate. Thus, for example, a channel input data rate of 100

1 through 15. Table 3-1 lists the optional channel cards

bps can be processed with the 0 to 150-bps rate range.

used within the multiplexer set, and identifies the channel

It is also important to note that any input rate variation

data form with which each card is associated.

that causes the input rate to exceed the upper limit of the

selected rate range may cause data errors to be

Change 2 3-7