#GECM Truck events for target and band control don't work

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cinder grail
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Tested in both mission editor and in multiplayer lobby using a event sequence. on default settings the jamming truck will jam mid when it encounters a AH-94. When using the "auto target on band" event the truck only jams mid no matter the setting, effectively ignoring the event commands. When using "manual target" the truck doesn't do anything, there is no jamming happening on low or mid band as far as i can tell. Same goes for manual direction.

atomic glacier
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The game starts at 0:35, (player spawn finishing at 0:37)
The jamming appears to start at 0:50 (video time,25s game time as per sequence)
The auto mode message appears at 1:00,

In other words, the jamming starts 10 seconds before the auto command in the command sequence. I'm guessing 'engage enemies' in their settings means auto mode.

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  • Manual direction
    Elevation 15.
    The jammer is at -4 from the helicopter, so the helicopter is at +4. I suspect the jammer 'beam' isn't 11 (well, 22) degrees high, and so it sent all the jamming energy above the helicopter's head.

I have had success with using the GECM to do 'manual direction low' pointed just above a field of its friends, and this caused GPS bombs to miss by up to at least 300m.

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  • Auto mode vs Target modes
    [Auto mode] will "jam any detected radar emissions". (works in video)
    [Auto-target on Band] will "find and engage targets".
    [Manual Target] will "otherwise remain inactive".

My best theory: The latter two both require a "target".

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If my theory is correct, if you have a radar on site that can detect the helicopter, it would work as expected.

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Try an event sequence of
1s delay; if [unit player] is detected now; do message "detected" 1s, self restart
And see if it has done the actual detection.
In particular, just emitting (radar/jammer) is not enough.
I used that to find just how much closer you can get with a jammer active.

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Lacking a target, [manual target] will shut down jamming. As observed in the video.
Lacking a target, [auto target] appears to fall back on one of:

  • Engage Enemies (effectively auto mode)
  • Auto mode (because it was given that previously)
  • Keep doing whatever jamming you were doing until you have targets to choose from
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(probably the first, further testing would reveal which)

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(Lots of speculation in all of the above. Testing may be required. But at face value it perfectly explains your results.)

cinder grail
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i tried the same test with radar set to engage enemys and it was the same results

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and i was well within the radars detection range

atomic glacier
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I did some testing.

Setup:

  • I used the EF-24G for its better instrumentation (TSD rings)
  • To remove a bunch of variables I parked it on top of a building so it wasn't moving around.
  • I tested with the jammer parked 0.5nm away and later 4.46nm away, within line of sight.
  • I used event sequences to 'map' the external light switches to various GECM settings. I observed the GECM's engage enemies setting works as a master switch for all its jamming efforts, and mapped the nav lights to turn that on and off. The others set various modes.
  • Due to previous observations with low band use, none of the commands specified low band jamming.

Observations:

  1. The GECM appears to start with AUTO mode until an event specifies otherwise. In auto mode, including if it is reset back to auto mode later, illuminating it with your radar has it start jamming your radar.

  2. If it is already jamming, the current jamming method may be 'sticky' until 'engage enemies' is cycled off and on again. I suspect this is what we see in straydog's video.

  3. In any other mode (than 'full auto') it will target me with low band (gps) jamming, ignoring the band setting passed in the action. My own radar on/off had no effect.

  4. Repeating the experiment at range (4.46nm) had the same outcome, except auto target mid/high don't start lowband jamming me until I advertise my presense (radar on).

  5. Manual Direction Mid, in a direction that went overhead, showed lots of red(low band) emissions from the jammer's direction, but was not actually achieving a GPS JAM. I'm assuming this would equally apply to high band jamming.

It appears some of my mission concepts is on pause for the time being.