[Resolved] Radio selector and ADF logic (UHF COMM/AUX)

[Tarres]

After make some tests,

Radio selector and ADF logic: 
According to the manual: 
i.-selector in T/R or T/R+G: you can listen the preset or manual frequency tuned on the UHF COMM and at the same time the AUX receiver is set in ADF mode, so no sound from the AUX preset but indication in the HSI of the bearing of the emitter of the AUX preset.
BUG: you can hear both signals at the same time, not possible according to the manual. ADF indication is correct for the AUX preset in the HSI.

ii.- selector in ADF+G/CMD: ADF indication for the UHF COMM preset and the AUX is set to COMM + GUARD, so in this position you can listen the preset set in the AUX receiver and have the GUARD freq. on standby.
BUG: you can hear both signals at the same time, not possible according to the manual. ADF indication for the UHF COMM is correct.  

iii.- selector in ADF/G: ADF indication in the HSI for the UHF COMM preset and Guard is enabled as receiver in the AUX.
BUG: you have ADF indication AND can hear the radio for the UHF COMM, not possible according to the manual. If a Guard transmission is received, both are listened at the same time, same bug as in (i).

d: selector in GUARD/ADF, the UHF COMM is set to the GUARD frequency for T/R in the UHF COMM and you have ADF indication in the HSI for the AUX preset.
BUG: you can listen the AUX preset and have ADF indication in the HSI for the AUX preset, not possible according to the manual. If a Guard transmission is received both are listened. Same as (i).

 

Note:

In a radiocommunication set with ADF position, when the ADF is enabled, you can´t listen anything because the selector is routed to the DF antenna to provide information about the bearing of the transmitter to present it in the HSI.

 

Sorry for my English.

Edited June 19, 2024 by HB_Painter
Classification of Bugs and User reports

[Tarres]

Attached tracks.

Common in all scenarios: F4E in runway

Scenario 1:

UHF COMM: unit transmitting in 305. Position @30º right from the airplane.
No GUARD.
NO AUX preset.
Behaviour: 
    TR+G/ADF correct, 
    TR/ADF correct, 
    ADF+G COMM INCORRECT: ADF INDICATION (CORRECT) AND STILL ABLE TO HEAR THE SIGNAL EMITTED (INCORRECT)
    ADF/G INCORRECT. SIGNAL FROM UNIT IS HEARD (INCORRECT), ADF INDICATION IS CORRECT.
    G/ADF: CORRECT.

Scenario 2:
UHF COMM: no unit transmitting.
No GUARD
AUX Preset 1. Unit transmitting in 278MHHz. Same position as in Scenario 1.
Behaviour: 
    TR+G/ADF:INCORRECT. AUX preset 1 is heard, no signal must be heard from the AUX in this position. ADF indication is correct. 
    TR/ADF: INCORRECT: same as TR+G/ADF
    ADF+G COMM: Correct. AUX preset1 is heard. No ADF indication.
    ADF/G CORRECT.
    G/ADF. INCORRECT. AUX preset 1 is heard, no signal must be heard from the AUX in this position. ADF indication is correct. 

Scenario 3
UHF COMM: unit transmitting in 305. Position @30º left from the airplane.
AUX Preset 1. Unit transmitting in 278MHHz. Position @30º right from the plane.
No GUARD
Behaviour: 
    TR+G/ADF: INCORRECT. BOTH SIGNALS ARE HEARD. ADF indication to unit transmitting in AUX Preset 1 is correct.
    TR/ADF: INCORRECT. BOTH SIGNALS ARE HEARD. ADF indication to unit transmitting in AUX Preset 1 is correct.
    ADF+G COMM: INCORRECT. BOTH SIGNALS ARE HEARD, ONLY AUX PRESET MUST BE HEARD. ADF indication to unit transmitting in UHF COMM Preset 1 is correct.
    ADF/G: INCORRECT. SIGNAL FROM UNIT IS HEARD (INCORRECT), ADF INDICATION IS CORRECT. 
    G/ADF: INCORRECT. BOTH SIGNALS ARE HEARD (INCORRECT). ADF indication to unit transmitting in AUX Preset 1 is correct.

Scenario 4
Same as 3 but with an extra unit transmitting in GUARD @90 right from the plane.
Behaviour: 
    TR+G/ADF: INCORRECT. ALL 3 SIGNALS ARE HEARD. ADF indication to unit transmitting in AUX Preset 1 is correct.
    TR/ADF: INCORRECT.BOTH (UHF+AUX) SIGNALS ARE HEARD. ADF indication to unit transmitting in AUX Preset 1 is correct.
    ADF+G COMM: INCORRECT. ALL 3 SIGNALS ARE HEARD, ONLY AUX AND GUARD MUST BE ABLE TO BE LISTTENED. ADF indication to unit transmitting in UHF COMM Preset 1 is correct.
    ADF/G: INCORRECT. SIGNAL FROM UNIT IS HEARD (INCORRECT) AND GUARD SIGNAL IS HEARD (CORRECT), ADF INDICATION TO UHF COMM IS CORRECT. 
    G/ADF: INCORRECT. ALL SIGNALS ARE HEARD, ONLY GUARD MUST BE ACTIVE FOR T/R. ADF indication to unit transmitting in AUX Preset 1 is correct.

 

scenario1.trk scenario2.trk scenario3.trk scenario4.trk

Edited May 30, 2024 by Tarres

[Tarres]

Solved as per developer indications in another topic.

[HB_Painter]

Hey great to hear! Would you be so kind to link the thread that solved it for you for other users that might experience the same? Thanks