XTR-8LR-USB
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User Manual
The technical features can change without forecasting. AUR°EL S.p.A doesn’t assume any responsability of demage due to the improper use of the device.
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AUR°EL S.p.A.
Via Foro dei Tigli, 4 - 47015 Modigliana (FC) – ITALY
Tel.: +39.0546.941124 Fax: +39.0546.941660
http://www.aurelwireless.com
- email:
Rev 1.3 18/11/2019
Page
3
of
17
PWRDN
→
RX_NORMAL
1.5
ms
RX_NORMAL
→
PWRDN
1.5
ms
TX_NORMAL
→
RX_NORMAL
See : EQ1, EQ2 , EQ3, Picture 4
RX NORMAL
→
TX_NORMAL
See : EQ1, EQ2 , EQ3, Picture 4
Default Settings
Channel
(CN2) 869.5
MHz
Emitted power (tx)
20
dBm
Serial Bit Rate (only for data) note1
115200
Bps
Bandwidth
62.5
KHz
Spreading Factor
8
SF
Note l: UART data is meant 8,n,1. UART Speed (command S8) is related to data comunication. For command mode communication
this set up has no effect and it works basically to 9600bps
Note2: Test carried out according to method described in ETSI EN 300 220-1 V2.4.1 paragraph 7.6
Note3: Test carried out according to method described in ETSI EN 300 220-1 V2.4.1 paragraph 8.3
Note4: Test carried out according to method described in ETSI EN 300 220-1 V2.4.1 paragraph 8.3.4
Note5: Test carried out according to method described in ETSI EN 300 220-1 V2.4.1 paragraph 8.4
Description
Picture 1:
XTR-8LR-USB
Normal mode in Rx
: indicated through a red led blinking.
Command Mode
: indicated through a fixed red light led.
Valid data reception
: Blue Light Led blinking.
Data Transmission
: Fixed Green light led for the whole transmission.
LoRa modulation:
The RF modulator and demodulator use the spread spectrum radio technique and it's possible to set
Chip/Symbol ratio from 128 to 4096, depending on the desired RF sensitivity and flying time.
Improvement of sensitivity is outstanding compared to standard FSK modulation technique: 7,5 dB with 128
Chip/Symbol value and 20 dB with 4096 Chip/Symbol value.
Furthermore it is granted a general improvement of interference immunity, adjacent channel immunity and
blocking tests compared to FSK demodulator.
The tables here below show how to properly set modulation parameters depending on sensitivity and flying
time desired.
For a better clarification, flying time identifies the radio channel occupation for a data package composed of
8 bytes pr 8 bytes p CRC.
