Exiting Transparent Mode; Transparent Mode Format - Tait TM8100 Protocol Manual

1.7.2

Exiting Transparent Mode

1.7.3

Transparent Mode Format

Transparent Mode
Packetisation
PC
data
RS232
Flow
Control
FFSK Transmission
Format
Lead-In HEADER FFSK data block . . . .
Delay 6 bytes max 46 bytes
TM8100/TM8200 Computer-Controlled Data Interface (CCDI) Protocol Manual
© Tait Electronics Limited April 2007
To change to Command mode while operating in Transparent mode, you
can:
send the escape sequence consisting of a 2 second idle time, followed by
■
three escape characters (sent within 2 seconds), followed by a further 2
second idle time.
Example: If the escape character is "+" (default), send
[2 second idle] +++ [2 second idle].
exit via the I/O line programmed for THSD, if Transparent Mode was
■
entered using this line.
radio
air-interface data out
air-interface data in
processing...
serial data out
serial data in
time...
data block 1
Lead-In
Delay
Transparent mode data is packetised into data blocks before it is sent over-
air. The start and stop bits are removed and a header is sent at the start of
each data block.
The Transparent Mode transmission format is as follows:
Singe Data Block:
Lead-In preamble sync
Delay 2 bytes 2 bytes
HEADER
Multiple Data Blocks:
CRC
2 bytes
over-air
no Flow Control
air-interface data out
air-interface data in
processing...
serial data out
serial data in
data block n
Lead-Out
Delay
size FFSK data block
2 bytes max 46 bytes
HEADER FFSK data block
6 bytes max 46 bytes
radio
data
RS232
Flow
Control
CRC
2 bytes
CRC
2 bytes
CCDI
PC
Lead-Out
Delay
Lead-Out
Delay
17