TM8100/TM8200 Computer-Controlled Data Interface (CCDI) Protocol Manual
CCR
57
© Tait Electronics Limited
April 2007
10.
Retain bits 0 to 7, discarding any higher order bits resulting from the
summation.
26h
11.
Form the two’s complement of the remainder.
26h = 0010 0110
two’s complement = 1101 1010
12.
Convert the binary number into two ASCII hex digits, MSD first.
1101 1010 = DA
2.5
CCR Mode Commands
2.5.1
Entering CCR Mode
CCR mode is entered from CCDI with the function zero command,
“f0200D8”. This command is described in the CCDI specifications.
Entry to CCR mode will be denied if the radio is busy scanning,
transmitting or processing emergency mode activities. CCR mode is not,
however, blocked when the radio is stunned; CCR can run in this state.
2.5.2
CCR/CCDI Mode Independence
CCDI and CCR are independent from each other in that commands and
responses for either command interpreter can only be processed in its own
mode. There are, for instance, no CCDI progress messages when the radio
is in CCR mode.
2.5.3
CCR Mode Activated
The radio sends the string “M01R00” to the DTE when CCR mode is
activated.
2.5.4
CCR Mode Busy
It is possible to program an output line for busy detect status in CCR mode.
2.5.5
Blocked Functions
CCR mode denies the following functions (that are available in user mode)
and indicates them as invalid if they are attempted from a front panel or
programmable input:
■
Channel selection
