Spring antenna is specialized for wireless data transmission. This antenna with good performance of V.S.W.R, small size design, easily installation, stable performance and good anti-shock and anti-aged compatible for Hoperf Modules.
USD3.0/pcs MOQ100pcs LoRa Antenna designed for Lora application which required for outdoor waterproof highgain and work at ISM free band like 433MHz /868MHz /915MHz SMA Male Whip antenna.
RFM50 module series’ design is based on the high performance RF50 SoC chip, It include a CIP-51 core‘ MCU and 100mW transceiver. It operate at 433/470/868/915 MHz ISM band, comply with FCC, ETSI regulation.
SA868 VHF& UHF 2W Analog Embedded Walkie Talkie Module
DWM23051301
SA868 is a cost-effective integrated professional walkie-talkie module which include UHF band 400~480 MHz, 320-400MHz and VHF band 134~174 MHz 3 frequency bands versions built-in high-speed microcontroller, high-performance RF transceiver chip and RF power amplifier.
SA868 is a cost-effective integrated professional walkie-talkie module, built-in high-speed microcontroller, high-performance RF transceiver chip and RF power amplifier, and provides a standard serial port to communicate with the module, so that the module's related parameters can be set quickly and easily. Function control. Users only need to connect an audio amplifier, microphone, and speaker to this module to work as a small walkie-talkie. The simplified interface and ultra-small size make this module widely available, and can be easily and quickly embedded in various handheld devices to improve the overall performance of the terminal products.
Features
UHF band 400~480 MHz
VHF band 134~174 MHz
350MHz band frequency：320-400MHz (3 frequency bands are optional)
Transmit receive frequency independent
Bandwidth 12.5 KHz
RSSI signal strength indication
Open distance is 5 kilometers
High receiving sensitivity: -124 dBm
Highly integrated small volume
166-level positive phase, inverted CDCSS digital sub-audio
8-level squelch
8-level adjustable volume
High and low power options (1.6W/1.8W)
Wide operating voltage 3.3-5.5 V
38-level CTCSS analog sub-audio code
Stable with 1ppm TCXO crystal
Application
Small walkie talkie
Ignore the intercom system
Building community security system
Outdoor sports products
Audio monitoring system
Specification
Parameter
Test condition
Min
Typ.
Max
Unit
Power supply
3.3
4.2
5.5
V
Working Temperature range
-30
25
70
℃
Current Consumption
Sleep current
≤1
uA
RX current
60
mA
TX current（High power）
900
1000
mA
TX current（low power）
450
550
mA
Transmitting RF Parameters
Frequency range
UHF
400
480
MHz
VHF
134
174
MHz
Out power（high power）
@VCC=4.0V
31
32.5
33
dBm
Out power（low power）
24
25
26
dBm
Modulation frequency
@1.5Khz/2.5KHZ Frequency offset
10
mV
Audio modulation distortion
@1.5Khz/2.5KHZ Frequency offset
2
5
%
Signal to Noise Ratio
@1.5Khz/2.5KHZ Frequency offset
38
40
45
dB
adjacent-channel power
@12.5K offset
-60
dBc
CTCSS Modulation frequency
0.35
0.5
0.75
KHz
Modulation frequency
UHF
400
480
MHz
Receiving RF Parameters
Receiving sensitivity
13dB Output voice signal ratio
-124
dBm
Receiving SNR
@1.5KHZ Frequency offset
45
50
dB
Audio output amplitude
700
mV
Audio Output impedance
200
OHm
Pin Definition
Pin NO.
Pin name
I/O state
1
Audio ON
Connected to audio power amplifier. When the module worked, it can control the extra audio amplifier automatically, it will output low level to turn on the amplifier and high level to turn off the amplifier.
2
NC
Not connected
3
AF_OUT
Audio output
4
NC
Not connected
5
PTT
Module Input, Transmitting/receiving control, "0" force the module to enter TX state; and "1" to Rx state
6
PD
Power Down control, "0" for power down mode; "1" for the normal work
7
H/L
high/low output power control; Leave open for high output power，low level to low output power. (Please kindly note: this pin can NOT be connected to VDD or high level of cmos output)
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SR-FRS-0W5U (UHF:400M-480MHZ) is a low cost but high-performance integrated walkie talkie module. With built-in high performance micro controller, narrow band rf transceiver and standard Uart interface, it can be easily used and succeed in all the walkie talkie function with good quality voice and long-distance transmission.
SR-FRS-2WUS 400MHz-470MHz is 2W a low cost but high-performance integrated walkie talkie module. With built-in high performance micro controller, narrow band rf transceiver and standard Uart interface.
SA868 is a cost-effective integrated professional walkie-talkie module which include UHF band 400~480 MHz, 320-400MHz and VHF band 134~174 MHz 3 frequency bands versions built-in high-speed microcontroller, high-performance RF transceiver chip and RF power amplifier.
