Adjustable amplifier / signal booster / amplifier for Crankk and Helium Hotspot - latest generation
 
For us one of the best amplifiers. The fine tuning of the amplification is completely new. On the Reception power (Rx) can be adjusted via pins in the range from 9db to 16db realize depending on the needs of the set-up. The same also applies to the Transmission power (Tx) between 0db and 7db can be adjusted. This means that individual miners can be optimized or 2 or 3 miners can be connected to one antenna using a splitter. (However, I recommend an RSSI signal modifier RSM for Helium Miner). The optimal conditions can be set by varying the gain.
An LED indicates the mode. Rx red (always lit) and Tx green (only when a beacon is sent).
 
Can also be used for Crankk networks ;-) E.g. using a shared antenna via a splitter. Helium Miner + Crankk Miner
 
The three measurements show the settings Rx 9 / 12 and 16db on a 20.8db calibrated attenuator. Attenuator - displayed S21 db value = measured gain. Look at this peak at 868MHz ;-) 
The other two measurements show at Tx 0db 40 GTWs (hotspots) and Tx 7db 76 GTWs (hotspots) at a frequency of 868.1MHz on a standard SenseCap 2.8dbi antenna at the desk! You can also see the signal improvement in the field test. New HS have also been added with RSSI -137db, which would be outside the valid reception range without an amp (set here +9db). All values are very similar for the IP64 outdoor amp. It performs a little better.
 
Optimally tuned for the frequency range 868 MHz.
 
For outdoor use, we recommend the also adjustable IP64 outdoor amplifiers.
 
Features: 868MHz signal amplifier
 
Type:    
Signal Amplifier (adjustable via pins)
Network:   
including Helium / Crankk LoRaWAN
Center Frequency: 
868MHz
RX Gain:     
9-16db (+dual filters)
Tx Gain: 
0-7db
Noise figure:
< 1.5dB
Working Temperature: 
-20~+80℃
Rx Tx Switching time:
max. 200ns (2.0×10^-7 seconds [s])
Transmit Power:
15dB/30mW
Other:  
Built-in LNA SAW filter
Power supply
USB-C cable + 5V power adapter
 
ConnectionsSMA female to miner, RP-SMA female to the antenna. Application is indoor, amplifier including power supply and USB-C connection cable. Device also runs via hotspot USB interface.