Input noise pulse spikes are simulated by Siglent arbitrary waveform generator.
Frequency 14MHz
Pulse signal duration 80 periods (sinusoids)
Silence duration 100 mili seconds
Input amplitude 0dbm (>600mV)
In other words injecting at receiver input very strong pulse spikes ~600mV, width 5.7uS, every 100mSec
Menu 35 selects blanking pulse width 1 – 8 from 7 to 70uSec
Menu 36 selects gate sensitivity (threshold) level 1 – 16
Noise blanker (NB) functionality will be added in new FW ver.2.40A. Check firmware updates section for this update that will be available soon. NB module is optional board that can be fitted on RF MIXER board.
Demo video is here:
There is simulation in real situation and how NB module interacts on useful receiving signal. Is there any artifacts of its action.. Please comment. For the test have been used the following stuff: Siglent waveform generator and Mini circuits two way signal splitter.
73 - Petr, OK1RP
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