Dvb-T/H Useful Bit Rates - Promax MO-180 Manual De Usuario

USER'S MANUAL MO-180
4) Next, if the format of the sent message is correct and its execution was error-
free, an ACK (acknowledged) should be received. Otherwise, a NAK (not
acknowledged) will be sent back by the modulator.
5) If the control command was a query, the reply should be received at this point.
6) Once the message has been processed, the MO-180 will issue an XON to
indicate that it is ready for new commands.
A typical communication timing diagram would look as follows:
Tx/Rx PC
⇐
⇒
⇐
⇐
⇐
⇐
Note: That all characters are transmitted in ASCII code.
Commands should always be sent in capital letters and cannot be edited online,
i.e., once a character is received it is stored in the MO-180 serial buffer and cannot be
corrected by sending an erase code.
In communication idle mode (MO-180 waiting for a command) the modulator will
send an XON code once per second to allow synchronisation with the remote controller
Command list.
There are two main types of commands: Interrogative and Control. They are
initiated by sending an '*' character, have ASCII text format and always share a similar
structure. For instance, the equipment model name can be retrieved by sending
"*?NAM<CR>" and the answer is "*NAMO-180" (always without quotes) Some amount
of parsing must be applied, to recover the wanted data from the received text (in this
particular case, the name is "MO-180").
Appendix B gives a thorough and detailed description of all the serial
commands currently implemented in the MO-180.

4.14 DVB-T/H useful bit rates

In the following, we present the useful bit rates (Mbits/s or Mbps) for all
combinations of guard interval, constellation and convolutional code rates in DVB-T/H
systems and channels of 8, 7, 6 and 5 MHz bandwidths. The useful bit rate does not
depend on the transmission mode (2k, 4k or 8k).
04/2008
MO-180
XON Equipment ready for command
*?NAM<CR> Command issued by the controller
XOFF Command received indication
ACK Command accepted / understood
WAIT... Execution delay
*NAMO-180<CR> Command answer sent
WAIT Usually some small delay
XON Equipment ready for command
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