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ARF868 Radio Modems- Guide utilisateur / User guide version V2.2.3
Power 25mW (14dBm) at 38.4kbps
Sub band
863 - 868,600 MHz
868.700-869.200MHz
869.700-870MHz
Power 25mW (14dBm) at 57.6kbps
Sub band
863 - 868,600 MHz
868.700-869.200MHz
869.700-870MHz
6.2. RF Transmission and turn-around time
ARF868 transmission duration from TX modem to RX modem - Continuous Mode
Mode
RF Data rate
Register S218 set-up
2,4kbps
9,6kbps
Continuous
S218=1 (immediate departure)
38,4kbps
57,6kbps
Tx
DATA
Rx
ARF868 transmission duration from TX modem to RX modem - Packetized Mode
Mode
RF Data rate
Register S218 set-up
2,4kbps
9,6kbps
S218 = same number of bytes
Packetized
38,4kbps
57,6kbps
Tx
Rx
Channels (by steps of 6)
18, 24, 30...., 450, 456
474, 480.... 498, 504
552, 558, 564
Channels (by steps of 8)
16, 24, 32...., 448, 456
472, 480.... 496, 504
552, 560, 568
Frame size (in
bytes)
N/A
DATA
t
Frame size (in
bytes)
30
1024
30
1024
than the frame
30
1024
30
1024
DATA
t
Frequency (in MHz)
from 863,075 to 868,550
from 868,775 to 869,150
from 869.75 to 869,900
Frequency (in MHz)
from 863,05 to 868,550
from 868,750 to 869,150
from 869.75 to 869,950
Duration of RF
Measurement conditions
transmission (t)
95ms
From the stop bit of the first
42ms
byte (TX side) to the start
15ms
bit of the first byte (RX side)
10ms
Duration of RF
Measurement conditions
transmission (t)
195ms
3500ms
66ms
From the last bit of the last
904ms
byte (TX side) to the first bit
19ms
of the first byte (RX side)
236ms
14ms
163ms
DATA
Frequency agility
by step of 75kHz
by step of 75kHz
by step of 75kHz
Frequency agility
by step of 100kHz
by step of 100kHz
by step of 100kHz
Note
The TX/RX turn-around time of the modem is
included in the transmission time.
The turn-around time is also masked by the
UART delay (depending of the serial data rate of
the connected "customer product") and
processing time of the "customer product".
Note
The TX/RX turn-around time of the modem is
included in the transmission time.
The turn-around time is also masked by the
UART delay (depending of the serial data rate of
the connected "customer product") and
processing time of the "customer product".
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