Arma 3: Spectrum Device
The Spectrum Device is a tool / feature introduced in Arma 3 Contact. It's fully integrated only in the optionally loaded expansion data, relying on systems that cannot exist outside of Contact.
The default Arma 3 version contains a light version of the device, which has a basic API for usage in scripts.
On its own, the simplified system handles these features:
- Horizontal compass
- Spectrum line animation (i.e., noise)
- Player-controlled frequency selection (mouse wheel by default while in the 'sights' view)
All other features have to be controlled by user-made scripting, notably:
- Setting signal values (e.g., a stronger signal when pointing towards its source)
- Playing sounds
- Transmitting signals
Certain aspects are not supported at all:
- Signal labels (frequency and signal name above the peak)
- Selected signal to transmit (shown below the compass in Contact)
The device can be configured using global variables. Since the device is calculated locally, it is possible to set different values on each client in multiplayer.
Frequency range in which the analyzer operates. The values are in MHz.
missionNamespace setVariable ["#EM_FMin", 140]; missionNamespace setVariable ["#EM_FMax", 143];
Sensitivity of signals the analyzer is able to detect. The values are in dBm.
missionNamespace setVariable ["#EM_SMin", -60]; missionNamespace setVariable ["#EM_SMax", -10];
Currently selected frequency. Must be within the frequency range, otherwise it will not be shown. The values are in MHz.
missionNamespace setVariable ["#EM_SelMin", 141.6]; missionNamespace setVariable ["#EM_SelMax", 141.9];
Since the player can change the selection, it is possible to use getVariable to get the current value.
When a signal is selected, it is possible to progress the scanning bar by setting the following variable. The value is in a range from 0 to 1.
missionNamespace setVariable ["#EM_Progress", 0.5];
To visualize transmitting, set the following variable to true.
missionNamespace setVariable ["#EM_Transmit", true];
List of displayed signal values. The array is in format [frequency1, strength1, frequency2, strength2, ... frequencyN, strengthN].
missionNamespace setVariable ["#EM_Values", [141.8,-30, 140.85,-50, 141.12,-40]];