REFERENCES
55
2
NOTE
If communicating with only one RF device in 2 way mode, Address
Stamping is not required, since the data/answer generated by the
Host is only sent to that device. In this case STAR Modem™ can
receive data (messages) via radio only after sending the 2 way
answer.
2.4.4 Address
Delimiter
The Address Delimiter allows a character to be included to separate the Address
stamping fields from the next fields in the message. Once enabled, it is required to
set the Host application to include the Address Delimiter character in the message.
Any character can be included in the hexadecimal range from 00 to FE.
2.5 RADIO
PARAMETERS
2.5.1
RF Baud Rate (not for USA Model)
This parameter defines the baud rate used for radio communication. For
STAR Modem™ USA model the baud rate value is always set to 36800, while for
European models it can be set to 9600 or 19200 according to the device
communicating with STAR Modem™.
2.5.2
Transmission Mode (Client only)
STAR Modem™ Client can communicate within the system using two different
transmission modes:
•
1 way mode:
(default)
STAR Modem™ transmits data without requiring an
acknowledgement answer from the Remote Host (see par. 2.1
for details).
•
2 way mode:
STAR Modem™ transmits data requiring an acknowledgement
answer from the Remote Host (see par. 2.1 and par. 2.5.5 for
details). When the destination device is connected to the
Remote Host through the Wedge Interface, it considers the
transmission successful after data has been sent. Therefore, an
Empty Answer is generated and passed back to the modem.