Region | Radio Model | Settings | Standard |
USA | 3DR 900 | MIN_FREQ=902000 MAX_FREQ=928000 NUM_CHANNELS=50 | FCC 15.247 |
Canada | 3DR 900 | MIN_FREQ=902000 MAX_FREQ=928000 NUM_CHANNELS=50 | RSS-210 Annex 8.1 |
Australia | 3DR 900 | MIN_FREQ=915000 MAX_FREQ=928000 NUM_CHANNELS>=20 | LIPD-2000 item 52 |
Australia | 3DR 433 | MIN_FREQ=433050 MAX_FREQ=434790 TXPOWER<=14 | LIPD-2000 item 17 |
Europe (most countries) | 3DR 433 | MIN_FREQ=434040 MAX_FREQ=434790 TXPOWER<=8 NUM_CHANNELS>=30 | ETSI EN300 220 7.2.3 |
Europe (most countries) | 3DR 433 | MIN_FREQ=433050 MAX_FREQ=434790 TXPOWER<=8 DUTY_CYCLE=10 | ETSI EN300 220 7.2.3 |
United Kingdom | 3DR 433 | MIN_FREQ=433050 MAX_FREQ=434790 TXPOWER<=8 DUTY_CYCLE=10 | IR2030/1/10 |
New Zealand | 3DR 900 | MIN_FREQ=921000 MAX_FREQ=928000 | Notice 2007, Schedule 1 |
New Zealand | 3DR 433 | MIN_FREQ=433050 MAX_FREQ=434790 | Notice 2007, Schedule 1 |
Brazil | 3DR 433 | MIN_FREQ=433000 MAX_FREQ=435000 TXPOWER<=8 | Resolucao ANATEL n?506/2008 |
Brazil | 3DR 900 | MIN_FREQ=902000 MAX_FREQ=907500 NUM_CHANNELS>=11 | Resolucao ANATEL n?506/2008 |
Brazil | 3DR 900 | MIN_FREQ=915000 MAX_FREQ=928000 NUM_CHANNELS>=26 | Resolucao ANATEL n?506/2008 |
Argentina | 3DR 900 | MIN_FREQ=902000 MAX_FREQ=928000 | Comision Nacional de Comunicaciones |
South Africa | 3DR 433 | MIN_FREQ=433050 MAX_FREQ=434790 TXPOWER<=10mW | 2008 RR 5.138, Government Gazette No 31127, Notice No 713 of 2008 and Government Gazette No 31290, Notice No 926 of 2008 refer |
: . -
, - . 3DR , , , . , .
:
(MHz) | (MHz) | |
3DR 433 | 414.0 | 454.0 |
3DR 900 | 895.0 | 935.0 |
Duty Cycle
DUTY_CYCLE 100. .
. 433 10%.
100% , AIR_SPEED .
, 2 , AIR_SPEED = 128 ECC DUTY_CYCLE = 10
DUTY_CYCLE = 0, NUM_CHANNELS,
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(Listen Before Talk, LBT)
3DR LBT
LBT , . LBT_RSSI , , , .
LBT LBT_RSSI. , . LBT_RSSI , LBT .
25, (-121 ). LBT_RSSI , . LBT_RSSI 25 0,5 . , LBT_RSSI 40, , , , 7.5dB .
, , dBm:
signal_dBm = (RSSI / 1.9) - 127, . . Si1000 .
LBT 3DR 5 , 9.2.2.2.
, LBT AFA (Adaptive Frequency Agility)). 3DR AFA , NUM_CHANNELS 1.
, , .
(FHSS) (TDM).
, MIN_FREQ + -MAX_FREQ NUM_CHANNELS . '' . .
:
channel_width = (MAX_FREQ - MIN_FREQ) / (NUM_CHANNELS+2), "" NETID. , , NETID .
GFSK ( ) .
TDM , , 16 . , 0,4 ( ). , TDM :
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- EEPROM TDM, , , 16 . ATI6.
- 3
- ,
- .
- , .
- NETID " "
- TDM,
- , 2048 .
- % , .
- TDM , -, , B : " , , ". .
- , - , , , . . , , .
. , , GFSK. :
frequency_deviation = air_data_rate * 1.2min freq deviation = 40
max freq deviation = 159
frequency_deviation , air_data_rate .