OPERATION GUIDE
OG_SLR-434M_v10e
Circuit Design, Inc.
4
3. Specifications
*All values are when the antenna connector is the 50 Ω terminal.
*Unless otherwise indicated, specified values are at a temperature of 25 °C ± 5 °C.
Item
Specification
Applicable standard
EN 300 220
Frequency channels
433.075 MHz to 434.7750 MHz (12.5 KHz step, 137 channels)
Frequency deviation
± 2 ppm or less
Antenna power
10 mW or less
Communication
method
Half-duplex or one-way
Radio wave format
F1D
Modulation*
1
LoRa or Binary FSK
Radio communication
speed
15 to 245 bps (Real speed using LoRa, depends on the spreading
factor)
4800 bps (FSK)
Receiver spurious
radiation
-54 dBm or less
Receive sensitivity*
2
-133 dBm (LoRa 128 chip), -115 dBm or less (FSK),
PER 1% with the user data of 45 bytes or less
Carrier sensing
threshold
-96 dBm (LoRa)
Operating temperature
range
-30 to +70°C
Storage temperature
range
-30 to +80°C
Recommended
operating voltage range
3.5 to 5.0 V
Warranted operating
voltage range
3.3 to 5.5 V
Operating current
Tx: 29 mA (Typ)
Rx: 17 mA (Typ) (Supply power = 5 V)
Antenna provided
1/4λ whip antenna (L=170 mm, gain 2.14 dBi or less)
Antenna connector
SMA
Interface
UART port
External dimensions
40 × 29 × 6.2 mm (±0.4) (Not including the antenna and
projections)
Weight
13 g
Soldering conditions
Hand soldering
Soldering iron temp.: 350°C within 3 seconds
Note:
*1:
When using the LoRa mode and moving around, the impact of the Doppler effect may make
communication impossible.
*2: Receive sensitivity performance is affected by the power supply and surrounding noise levels (floor noise
level). The approximate minimum level at which reception is possible is noise level +10 dB for FSK and -10
dB for LoRa. (Example: When the floor noise level is -110 dBm, reception is possible with FSK to about -
100 dBm and with LoRa to about -120 dBm). You can check the floor noise level with the @RA command
and the evaluation application (air monitor).
