I was flying the A321 yesterday and I was asked (by PF3) to dial 128.020 frequency, when I rotated the dial the frequency when from 180.015 straight to 180.025. I did the test in all the airbus 318-19-20-21 and 330 same thing. So it's not possible to dial any .020 frequency. I have posted this issue on the Aerosoft forum and I was told:
This is completely normal with 8.33 kHz frequency spacing. On dial 118.015 is actually 118.0167 MHz and adding 8.33 kHz there we get 118.0250 MHz.
Here is a good document from Eurocontrol that explains 8.33 kHz spacing in extreme detail. Page 89 contains a frequency table with Dial, 25 kHz frequency and 8.33 kHz frequency:
https://www.eurocontrol.int/sites/defau ... r-handbook
So to answer this exact question, it's all as it should be.
I also did the same test with the PMDG 747-8 v3 and Aerosoft CRJ professional, same result I cannot dial 128.020.
I have include the PF3 file for my flight:
CC1=124.80 - ROMA CONTROL
CC7=128.02 - CONTROL
CC9=124.50 - CONTROL
CC19=128.05 - ZURICH CONTROL
So during the flight I couldn't contact CC7=128.02 - CONTROL . It seem that PF3 is using frequency that we are not able to dial.
Any suggestion on what I should do in those situations?