User's Manual

SATELLINE-M3-TR1
User Guide, Version 3.0
20
5 RF INTERFACE
The SATELLINE-M3-TR1 module has a single antenna connector with an impedance of 50 ohm.
The user can change the frequency of the radio modem afterwards within the frequency range.
The data speed of the radio interface depends on the chosen radio channel spacing. A channel
spacing of 25 kHz enables a data speed of 19200 bps and a channel spacing of 12.5 kHz and
20 kHz enables, correspondingly, a data speed of 9600 bps. The data speed of the radio
interface is always fixed (19200 bps or 9600 bps), irrespective of the data speed of the serial
interface. If the data speeds of the radio interface and the serial interface differ from each other,
the radio modem will temporarily buffer the data in transfer, so no data loss will occur.
NOTE! 25 kHz channel spacing is not allowed in US.
5.1 Transmitter
The output power of the transmitter is adjustable between 100, 200, 500 or 1000mW. The
greatest allowable power depends on limits set by local authorities, which should not be
exceeded under any circumstances. The output power of the transmitter should be set to the
smallest possible level, which still ensures error free connections under variable conditions.
Large output power levels using short connection distances can, in the worst case, cause
disturbances to the overall operation of the system.
OUTPUT POWER
dBm
100 mW
+20
200 mW
+23
500 mW
+27
1 W
+30
Transmission output power values, Watts vs. dBm
NOTE!
Setting the radio data modem output power level to that which exceeds the regulations set
forth by local authorities is strictly forbidden. The setting and/or using of non-approved
power levels may lead to prosecution. SATEL and its distributors are not responsible for any
illegal use of its radio equipment, and are not responsible in any way of any claims or
penalties arising from the operation of its radio equipment in ways contradictory to local
regulations and/or requirements and/or laws.