SELECTED TRANSMITTER SHUTDOWN (14)
Error Conditions
Action taken by device
TX DIS
1. Invalid command.
No response.
Command ignored.
DATA
STATUS
CMD
*
2. Command followed by
another word.
No status response.
Set message error.
Sequence terminated.
This mode command is not normally used in dual redundant
systems.
The device will respond with status and shut down the transmitter
on the bus designated by the two least significant bits of the data
word.
3. T/R bit of command set
to zero.
No status response.
Set message error.
Sequence terminated
The bus addresses of the device are channel 0 - 00, channel
1 - 01. If the command is received on the same bus as the
designated shut down bus then the device will respond with status
and no shut down will occur.
4. Broadcast address.
No status response.
Set message error.
Set broadcast.
Once a transmitter has been shut down it can only be reactivated by
an 'Override Shutdown Command' or 'Reset Remote Terminal'.
If the command was a broadcast the status transmission will be
suppressed and the broadcast bit in the status register set.
Sequence terminated.
5. T/R bit of command set
to zero and broadcast
address
No status response.
Set message error.
Set broadcast.
Error Conditions
Action taken by device
1. Invalid command.
No response.
Command ignored.
Sequence terminated.
TRANSMIT BIT WORD (13)
2. Command not followed
contiguously by data
word
No status response.
Set message error.
Sequence terminated.
TX BIT
CMD
BIT
WORD
STATUS
*
3. Command followed by
too many words.
No status response.
Set message error.
Sequence terminated
On receipt of a valid Command to transmit the BIT Word the
device will respond with Status followed by the BIT word, after
which the BIT register is cleared.
4. T/R bit of command set
to one.
No status response.
Set message error.
Sequence terminated.
Bits 2 to 15 are always zero. Bit 1 is set if the subsystem sends too
many NSSTRB’s.
5. T/R bit of command set
to one and broadcast
address
No status response.
Set message error.
Set broadcast.
Error Conditions
Action taken by device
1. Invalid command.
No response.
Command ignored.
Sequence terminated.
OVERRIDE SEL TRANSMITTER SHUTDOWN (15)
2. Command followed by
another word.
No status response.
Set message error.
Sequence terminated.
TX EN
CMD
DATA
STATUS
*
3. T/R bit of command set
to zero.
No status response.
Set message error.
Sequence terminated
This mode command is not normally used in dual redundant
systems.
The device will respond with status and reactivate a shutdown
transmitter on the bus designated by the two least significant bits
of the data word.
The bus addresses of the device are channel 0 - 00 channel
1 - 01. If the command is received on the same bus as the
4. Broadcast address.
No status response.
Set message error.
Set broadcast.
Sequence terminated.
designated override shutdown bus then the device will respond
with status and no reactivation will occur.
5. T/R bit of command set
to zero and broadcast
address
No status response.
Set message error.
Set broadcast.
If the command was a broadcast the status transmission will be
suppressed and the broadcast bit in the status register set.
Sequence terminated.
14
SCDCT2578 REV B 3/11/98
AEROFLEX [ AEROFLEX CIRCUIT TECHNOLOGY ]
