Viggen anti-jamming modes (AS0-7) what do they do?

[Mr_sukebe]

I started re-visiting the Viggen yesterday (again).  Lovely aircraft.

Whilst methodically working around the controls again, I couldn't help but notice the AS anti-jamming modes.

I've never tried them before.  Had a look in the manual (both from HB and Chucks), no mention of their usage.

Do they actually do anything in DCS, if so, how do we best use them?

[Spirale]

I asked myself the same:

and here

 

[Mr_sukebe]

Thanks.

The reply suggests that they're about datalink?

In which case, I probably don't need to worry about it too much.  So mapping the controls enables me to "turn the knob clockwise and anti-clockwise".  Nice for the visuals I guess, even if it does nothing.

[Spirale]

Hi Mr,

No it was about the rotator and the position 0 to 7.

[TOViper]

The AS mode selector indeed influences the radar picture. Try it out:

• Place Russian warship Moskva on map
• Approach Moskva with the Viggen flying in 200 m above sea
• Turn on the radar and try to sweep the radar beam over the ship
• When your radar is sweeping over the Moskva, observe it jamming; thereby it might be a little hard to determine its current position caused by the missing range information); this is caused by the strong noise (black areas on the radar screen)
• Now use AS mode selector in different positions, and see the changes in appearance of the noise on the radar screen
• Maybe (!) then you may determine its real position by getting not only the bearing, but also range

Depending on range and height above sea you might get different results, but its important to observe the mode selector indeed changes something ...

 

Edited February 26 by TOViper

[Spirale]

i'll try thx

[Machalot]

On 2/26/2025 at 6:46 AM, TOViper said:

its important to observe the mode selector indeed changes something ...

But it's not consistent, the effect depends on what order you switch modes. For example I've seen different results by going from mode 1 to 4 than if I go from 1 to 7 to 4.

[TOViper]

Oh, that's an interesting spot, never noticed that.