Ailunce HS2 HF/VHF/UHF Full Mode SDR Transceiver
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3-2. IFG: IF gain.
The combination of RFG and IFG enables the receiver to achieve the highest sensitivity and the lowest amount of noise. Generally, you need to increase these two
parameters if you want to hear a very weak signal, but the noise also increases. A balanced state requires careful adjustment. Usually, the IF gain can be set higher
than the RF gain.
3-3, ATT: attenuation. If the signal is particularly strong, you can turn on ATT.
4. Long press the【BW】button to set the spectrum bandwidth, reference level, refresh rate, use the up and down buttons to select the setting item, left and right
buttons to set the value, and long-press the【BW】button again to exit. The spectrum display shows other signals within the bandwidth.
4-1, SPAN: spectrum bandwidth, respectively 12K, 24K, 48K width
4-2, REF: spectrum reference level.
4-3, SPEED: spectrum refresh rate.
5. Display setting of the spectrum and waterfall chart
Long-press the NR key to select and display the waterfall chart, long-press to select and display the spectrum chart, and long press to display the tile chart and the
waterfall chart at the same time.
6. Digital filter operation, HS2 provides a powerful digital filter.
We short press the BW button to select the digital filter. After the digital filter is turned on, the original white horizontal line on the spectrum is displayed in green.
Use the left and right buttons to select the filter bandwidth. Press the BW button again to confirm the filter bandwidth and exit.
Different bandwidths can effectively avoid interference signals to achieve excellent listening effects.
7. NR/NB noise suppression setting, usually this option shall cooperate with the digital filter to achieve excellent results.
7-1. we short press【NR】to turn on NR/NB, and short press to switch NR/NB. Press and hold the【DSP】key to turn off NR/NB. Short press【DSP】to set the
NR/NB/PEAK threshold, use the up and down keys to select the NR/NB/PEAK setting item, left and right keys to set the value, and short press【KSP】again to
exit.
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