SATELLINE-2ASxE
User Guide, Version 2.0
10
Labelling information:
Ser.no.
98290014
Fc:
468.2000 MHz
Init. Settings: 468.2000 MHz / 25 kHz
SATEL OY
Tel: +358-2-7777800, Fax: +358-2-7777810
x
Serial number
x
Frequency, centre frequency, tuning range +/- 1 MHz
x
Initial settings: Frequency / channel spacing
x
Contact information of manufacturer or distributor
2 Transmission with the Radio Modem
2.1 Transmission
The SATELLINE-2ASxE is ready to transmit data within 300 ms after the supply voltage is switched
on and the DTR line is in the "ON" state.
There are three different methods of initiating data transmission:
1. Transmission based on CTS or CD handshaking
2. Data connected directly to the TD line
3. Using TX control of RTS line
If the connection between the radio data modems breaks in the middle of the transmission i.e. as a
result of a weak signal, the radio modems can be reconnected by interrupting the transmission for a
moment.
1. Transmission based on CTS or CD handshaking
Handshaking should be used when the user needs to ensure that the radio channel is free and the
modem is ready to transmit data:
x
CD line turns "ON" if the radio channel is occupied (i.e. the strength of another
transmission or interference exceeds a preset sensitivity level)
x
CTS line turns ”OFF” if the radio modem has recognised a valid synchronization pattern
or if the modem is for any reason unprepared for transmission
