Summary :

1- When to use UniversRadio Transponder?

UniversRadio Transponder (UR IFF) is a virtual MODE1, MODE3 and MODE4 transponder and Identification Friend or Foe.

It is designed for DCS:FC3 NOTA fighter aircraft. So the F-15C…

UR IFF is not needed for A-10C, C-101EB , F-5E3, M2000C, UH-1H and F-14B, in-game cockpit panel settings are taken.

An IFF interrogation works only during a radar locked on, and from FC3 flighters.

/!\ Make sure than the DCS server allows objet export /!\ (see advanced server setting)



With UR Transponder :

pilots set transponder according to the breifing and/or ATC,

a human fighter pilot can do an IFF interrogation (interrogation must be done during a radar locked on) ,

, an ATC software (LotATC) can use IFF or Ident status to manage air circulation.

Launch UniversRadio Control Panel from UniversRadio DashBoard shortcut and choice “Transponder” :

2- How to use it ?

You will find UR Transponder shortcut in the Windows start menu UniversRadio.

Which actions can be done ? And, how to do ?

Action Command Setting codes

Mode 1 & mode 3 Left mouse, right mouse

or wheel mouse on focused mode Setting IDENT request Left mouse Setting Standby Left mouse Setting Mode 4 Left mouse on "M4" button Doing an interrogation

QUERY Left mouse button

Joystick (see UR Control Panel)

Keyboard :



Query : [Y] Display on top or hide UR Transponder Left mouse on arrow

Keyboard :



[Left Alternate]+[T] Get and release UR Transponder

as primary Window

/!\ DCS will be not able to

receive any command when

UniversRadio Transponder has focus Middle mouse button



When UniversRadio Transponder has focus,

frequency is displayed in orange Moving window 1. Get the focus : middle mouse button

2. Press and hold left mouse button, move cursor

3. On the good position, release left mouse

You can customize an IFF code for AI aircrafts. Add #IFF:xxxxcc at the unit name from DCS mission editor. xxxx is the mode3 code and cc is the coalition : UN (unknown), EN (ennemy) or FR (friendly).

Example for a IA A/C name : PARA_82ND #004 #IFF:1204FR So, when an interrogation will be done on this A/C, IFF respons will be – 1204 FR.

You can change IFF keys by modify ..\Saved Games\UniversRadio\UniversRadio.ini file (read included comments). This key is a secret share of your coalition.

3- Screenshot

UR Transponder is setted with

00 mode 1 code

7000 mode 3 code

Mode 4 is off UR Transponder is setted with

01 mode 1 code

7000 mode 3 code

Mode 4 is off

in standby position

as OFF, it can transmit UR Transponder is setted with

01 mode 1 code

7000 mode 3 code

Mode 4 is off

with IDENTification position

4- Results of “QUERY” interrogation

An IFF interrogation must be done during a radar locked on.



Result and interpretation Query window display IFF, transponder, remote squawk is OFF

or contact is not locked on UNKNOWN CONTACT

Civilian A/C : An-26B, An-30M, IL-76MD or Yak-40

DCS AI A/C have mode 3 codes begining by 6

with IFF code in UR CP is 000 FRIEND CONTACT

It is a friend military DCS AI A/C

DCS AI A/C have mode 3 codes begining by 4 FRIEND CONTACT

It is a human A/C

with same IFF code in UR CP

mode 1 code : 01

mode 3 code : 4548

Mode 4 is on2 ENNEMY CONTACT

Mode 4 is on2

It is a human A/C

with a different IFF code in UR CP

or

It is a ennemy DCS AI A/C

5- Interaction with UniversRadio ExternalRadio

According to IFF mode 4 ‘Secure Code’ in UniversRadio Control Panel.

When both, UniversRadio ExternalRadio and UniversRadio Transponder are launched, UniversRadio Transponder is displayed below ExternalRadio window.

UniversRadio Transponder window can be moved.

When UniversRadio ExternalRadio has focus, both windows display frequency and code in orange color.