Ailunce HS2 manual

HF/VHF/UHF Full mode SDR transceiver

Ailunce HS2 Manual

Ultra-portable full-frequency full-mode SDR radio which is launched by us. The receiving frequency is 300kHz ~ 1.6GHz, and the transmitting band covers 160m~70cm.

HS2 operation modes include SSB, CW, AM, FM, LoRa, and digital modes. It includes all the advanced functions and features of all radio stations.

Designed with two power supply modes, USB interface, and the DC interface. The power supply voltage range is a 5VDC ~ 32VDC. At the same time, all power interfaces support anti-reverse connection protection.

The power supply can output 2W power when it is powered by a 5VDC interface, also can output 30W power when it is powered by 13.8V HF and can output 5W power when it is powered by VHF / UHF.

The display adopts high brightness and high-resolution liquid crystal display, the backlight brightness can be adjusted, and it can also be clearly displayed outdoors. The panel is designed with a full keyboard, which is convenient for various operations. The keyboard backlight can be adjusted to operate the radio in a dark environment.

The built-in network interface can realize remote operation and remote firmware upgrade. The HAM-BOX mobile APP developed by Retevis company can remotely control the radio, making radio operation more convenient and fast. It has a built-in Bluetooth module, a USB cable integrated sound card, and a serial port, and a USB cable can control the radio.

HS2 has a lot of advanced features that are only available in large base stations. This machine has dual VFO mode, different frequency operation function, intermediate frequency offset adjustment, receiving frequency fine-tuning, intermediate frequency noise suppression.

AGC speed selection, RF gain adjustment, squelch control, front attenuator, AM aviation communication reception, AM/FM Broadcast reception, built-in telegraph automatic key, automatic key-point ratio adjustment, built-in CTCSS analog tone, automatic shutdown function (APO), transmission timeout function (TOT); connection with computer and computer-aided control function, copy function, etc.

Panel control and operation
Front panel

Ailunce HS21 Numeric keyboard

2 LCD Monitor

3 Function keyboard

4 Headphone interface

5 Wired hand microphone interface

6 Receiving indicator

7 Transmitting indicator

Key Function

KeyShort key FunctionLong Key Function
PowerSwitch the standing wave table (VSWR), ALC, MIC audio indicationPower on, power off
BandFrequency band selectionCW setting
SplitDifferent frequency on, different frequency offSubsonic setting
AFVolume, MIC gain, MIC audio compression, ground bass, trebleSound source selection
RFRadio frequency gain, Intermediate frequency gain, AGC, SQL, ATTUSB data output format selection
R/XRIT receiving frequency offset, IT transmitting frequency offsetTransceiver frequency deviation switch
ModeMode settingUSB/LSB, NFM/WFM switching
TuneAntenna tuner tuningAntenna tuner on and off
A/BA frequency or B frequencyA frequency = B frequency
NRNB or NR optionsOnly display the spectrum, only display the waterfall chart, display the spectrum and

the waterfall chart at the same time

DSNR, NB, PEAK threshold settingTurn off NR or NB
PATransmitting power setting30W, 5W transmission power gear selection
BWDigital filter selectionSpectrum bandwidth setting, spectrum reference level setting, spectrum refresh rate setting
Direction key leftLeft selection or decrement value operation*
Direction key rightRight selection or increment value operation*
Direction key upUp chooseFast frequency improvement
Direction key downDown chooseFast frequency reduction
MenuConfirmApplication interface, back

Indicator light

ConditionRed LightGreen Light
FlickerProgram exception

Advantage Functions:

  • Real-time spectrum.
  • Waterfall chart.
  • Doppler frequency tracking(under development).
  • Using software-defined radio technology (SDR), full-band support SSB, CW, RTTY, AM, FM.
  • Double frequency conversion circuit structure.
  • IF width and IF shift hardware and software can be modified to provide powerful IF interference suppression.
  • DSP digital noise reduction.
  • Built-in 160-6m high-speed automatic antenna tuner.
  • Built-in electronic key controller, all parameters can be set flexibly.
  • Built-in sound card with IQ and audio output.
  • Built-in FLASH memory(under development).
  • USB TYPEC3.1 interface for power supply and computer connection.
  • High accuracy TXCO ± 0.5ppm (-10-60 ℃).
  • Ultra-wide working voltage range: 5-32VDC.
  • Power Reversed Polarity Connection Protection
  • Built-in GPS / Beidou, GSM, electronic compass (acceleration, angle sensor) (optional)
  • GPS time (requires optional GPS module).
  • 18. Built-in UTC clock.
  • Voltage display.
  • Unique LORA data transmission (requires optional LORA module).
  • Ultra-light weight: ≤1KG
  • Built-in network port, support remote firmware upgrade(under development).

Rear panel interface

Ailunce HS2 Full mode SDR Radio.



Standard Configuration   
Option Configuration 
FM module
GPS module
Bluetooth module
LORA module
Bluetooth microphone
electronic compass module
Built-in sound card
wired microphone
Built-in automatic antenna tuner
Shortwave balcony antenna
Built-in memory
External frequency wheel(under development)


Transmitter Parameters:

Transmitter Architecture
Transmission Mode
Frequency Resolution
Transmit Frequency Range
1.800-2.000, 3.500-3.900, 5.351.5-5.366.5, 7.000-7.200, 10.100-10.150, 14.000-14.350,
18.068-18.168, 21-21.450, 24.890- 24.990, 28-29.7,
50-54, 144-146, 430-440MHz
Output Power
HF+6m: SSB(1~30W), CW(0.1~30W), FM(0.1~30W), AM(1~5W),
VHF: SSB/CW/FM(0.5~5W)
Power Consumption
RX:13.8V~0.2A(Normal),0.3A(Max brightness&Highest audio)
Carrier Suppression
Spurious Suppression
1.8—54MHZ: ≥50db
144—146MHZ: ≥60db
430—440MHZ: ≥60db
Memory Channel


Receiver Parameters:

Receiver Architecture
Receiver Mode
Receive Frequency Range
IF Bandwidth
SSB/CW:(BW: 2.4kHz @ 10dB S/N)
AM:( BW: 6kHz @ 10dB S/N)
FM:(BW: 15kHz @ 12dB S/N)
If Suppression
Image Suppression
Audio Output Power
2W (10% distortion rate, 8Ω load, 3KHZ)


Antenna tuner parameters:

Tuning frequency range
1.8-54 MHZ
Tuning impedance range
16.7 Ω–150 Ω unbalanced (SWR is better than 1: 3)
Tuning accuracy
VSWR: 1: 1.5 or less
Tuning time
2-5S (full segment 10S)
Tuning method
Automatic / Manual

Spectrum parameters:

Spectrum bandwidth
RF Spectrum


Structural parameters:

170X120X45mm (excluding protrusions)


Working voltage parameters:

Voltage range
5—32V receiving range,
5-12V transmit power limit,
12-18V full power output,
18-32V transmit power limit.


Antenna interface:

Antenna interface
TNC / BNT / M / N (optional)


Working environment parameters:

Working temperature
-10 ℃ to 60 ℃
Working humidity
10% — 90%

Note *1: Frequency range is different according to different countries or areas, the actual frequency by local legal provisions.

Note *2: Data retention.

Note *3: to be calibrated, the final interpretation of all manufacturers.

Price: -28% US $482.40 – 554.40


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