Motorola MSF 5000 Instruction Manual page 250

Appendix
C
MUXbus Descriptions
MSF
5000
Instruction Manual
MUXbus Overview
LOC PTT
INTCOM
TX PL
DS
TX ACT
RX2
ACT
C-4
Local Push-To-Talk
(A1/D1)
Keys
the transmitter,
modulating with local audio if
no higher
priority
PTT
is
active.
PTT
priorities
are set on a per mode basis
by
the
Field
Programmer or
with
option C672.
LOC PTT
is inactive when RB/TOC is encoded, unless
the
RB/TOC
is caused
by
the
Local
PTT
timing
out.
This bit is usually written
to
by
the
SSCB,
in
response to
a
PTT
switch actuation on
a
local microphone plugged into
the
station control module front panel Control connector J812.
Intercom (A1/D0)
Allows LOC PTT
without keying
the station,
which enables a service technician at
the station to communicate
with
the console site
via
the wirelines.
This bit is
usually written
to the
MUXbus by
the
TTRC
module,
in
response to the front
panel Intercom switch.
Transmit PL/DPL Disable (A2/D3)
Disables
PL, DPL,
or Trunking Data from being added onto the transmitted
signal. The Transmit
PL
Strip wireline option (C63) utilizes this bit.
If
PL
or
DPL
is
being encoded when
TX
PL DS
goes active, then
RB/TOC will
be generated
before
muting
PL
or
DPL. This
bit
will
also be set active
by
the front panel
Xmit
switch on
the station control module.
Transmitter
Activity
(A2/D2)
Indicates that the transmitter is actually
on.
This bit
is a
reflection of the front
panel
PA ON LED.
The
TX ACT
bit is
a
STATUS-ONLY
bit.
This
means that the
bit
is used for
indication purposes
only.
Activating
this bit
via
the
DMP
or wildcard module
will
not cause the station to
key
or activate the transmitter.
Only
the
SSCB may key
the
station, in response to its inputs.
Receiver
2
Activity
(A2/D1)
Indicates that the second receiver audio has met the qualifiers
set
for it
on the
current mode.
The
second receiver option is not yet supported, so this bit has no
effect when active.
68P81092E11
3/19/94
Appendix
C
MUXbus Descriptions
MSF
5000
Instruction Manual
MUXbus Overview
LOC PTT
INTCOM
TX PL
DS
TX ACT
RX2
ACT
C-4
Local Push-To-Talk
(A1/D1)
Keys
the transmitter,
modulating with local audio if
no higher
priority
PTT
is
active.
PTT
priorities
are set on a per mode basis
by
the
Field
Programmer or
with
option C672.
LOC PTT
is inactive when RB/TOC is encoded, unless
the
RB/TOC
is caused
by
the
Local
PTT
timing
out.
This bit is usually written
to
by
the
SSCB,
in
response to
a
PTT
switch actuation on
a
local microphone plugged into
the
station control module front panel Control connector J812.
Intercom (A1/D0)
Allows LOC PTT
without keying
the station,
which enables a service technician at
the station to communicate
with
the console site
via
the wirelines.
This bit is
usually written
to the
MUXbus by
the
TTRC
module,
in
response to the front
panel Intercom switch.
Transmit PL/DPL Disable (A2/D3)
Disables
PL, DPL,
or Trunking Data from being added onto the transmitted
signal. The Transmit
PL
Strip wireline option (C63) utilizes this bit.
If
PL
or
DPL
is
being encoded when
TX
PL DS
goes active, then
RB/TOC will
be generated
before
muting
PL
or
DPL. This
bit
will
also be set active
by
the front panel
Xmit
switch on
the station control module.
Transmitter
Activity
(A2/D2)
Indicates that the transmitter is actually
on.
This bit
is a
reflection of the front
panel
PA ON LED.
The
TX ACT
bit is
a
STATUS-ONLY
bit.
This
means that the
bit
is used for
indication purposes
only.
Activating
this bit
via
the
DMP
or wildcard module
will
not cause the station to
key
or activate the transmitter.
Only
the
SSCB may key
the
station, in response to its inputs.
Receiver
2
Activity
(A2/D1)
Indicates that the second receiver audio has met the qualifiers
set
for it
on the
current mode.
The
second receiver option is not yet supported, so this bit has no
effect when active.
68P81092E11
3/19/94