SATEL-EASy+
User guide
Version 1.33
42
6.12 Japan regional specific features
Modem can transmit (TX-frequency) and receive (RX-frequency) on separate frequencies. The
switch between the frequencies introduces an extra 20 ms delay in the data transfer that must
be taken account when designing the system.
Carrier Sense feature
Carrier sense feature is intended to use with certain region codes to achieve country specific RF
specifications.
This feature works only with region codes where it is required, e.g., with Japan region code, to
prevent device to transmit if it senses another signal in current channel to be stronger than
given threshold before going to transmit state. When transmit is prevent, all buffered data is
discarded.
Carrier sense threshold is adjustable (see SL commands) with range -60 ... -117 dBm.
Value -118 dBm will turn this feature OFF.
Detailed SL commands required for carrier sense can be found in SL commands list. Please
contact SATEL Oy for latest SL commands list.
Transmit time limitation
This feature is used to limit transmit time in certain region codes to achieve country specific
transmitter time limitations, defined in RF specifications.
E.g., Japan region time limit will be five (5) minutes. If time limit was reached, transmitter is
prevented to transmit for one (1) minute. Receiver will work normally within this time.
Transmitter Call ID
This feature works only with region codes where it is required, e.g., with Japan region code.
Transmitter Call ID means that the modem sends a transmission ID with each transmission. The
transmit ID is a 9-character identifier that is unique for each device.
Transmit ID Call sign is configured using a SATEL SL-command
a) Set the transmitter Call ID with the command SL%CID=<max. 9 digit>
b) Transmitter Call ID query with the command SL%CID?
Detailed SL commands description for transmitter Call Id can be found in SL commands list.
Please contact SATEL Oy for latest SL commands list.
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