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Appendix C MUXbus Descriptions

MSF

5000

Instruction Manual

MUXbus Overview

TX RX

C8,

TX RX

C4,

TX RX

C2, and

TX RX

C1

Transmitter/receiver

1

Channel (A8/D3

thru A8/D0)

These four bits

are used to

control the channel of the transmitter and Receiver

1.

The channel parameters

are

defined

by

the

SSCB module

code

plug. These bits

represent the channel number

in binary format,

so

channels

0

through

15

may

be

represented

with

these bits.

For channels higher than

15,

the

Auxiliary

Channel

bits

are used

(AUX

C8

-

AUX

C1).

These

MUXbus

bits actually represent the requested operating channel;

the actual

operating channel is always indicated

by

the front

panel Status display.

A

discrepancy may arise between

the

two indicators

if

an undefined channel is

requested; in this case, the

SSCB utilizes

channel number

1.

AUX

C8,

AUX

C4,

AUX

C2,

and

AUX

C1

Auxiliary Channel

(A9/D3 thru A9/D0)

These four bits

are

overflow bits which may

be used for

indicating

channel, mode,

or

Receiver

2

channel, depending on the application.

RX2 C8, RX2 C4, RX2 C2,

and

RX2

C1

TX

INHB

RX

INHB

Second Receiver Channel

(A10/D3 thru A10/D0)

These four bits

are

used

to

control the channel of Receiver

2.

The channel

parameters are defined

by

the

SSCB module

code

plug. These bits

represent the

channel number in binary format,

so

channels

0

through

15

may

be represented

with

these bits.

For channels higher

than

15,

the

Auxiliary

Channel bits

are

used

(AUX

C8

-

AUX

C1). In

MCS

stations, these bits are used to indicate the four least

significant bits of

the

active

MCS

user number.

The

second receiver option is not

yet supported,

so

this bit has no effect when active.

Transmit

Inhibit (A11/D3)

Indicates that the transmitter is inhibited. When active, no station transmitter

activity

is allowed.

All

PTT

requests

will

be

ignored.

Receiver

1

Inhibit (A11/D2)

Indicates that

the

receiver audio is inhibited from reaching

the

wireline. When

active, no audio (including status tone) is gated

to

Line

2

or

Line

4.

68P81092E11

3/19/94

C-8

C-8

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