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Second antenna input, disable

 
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Blaumann
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Post28-12-2010, 10:50    Subject: Second antenna input, disable Quote

Hello everyone,

I installed an RDS300 into a Caddy. The RDS 300 has two antenna inputs.
The Caddy only has one antenna, which is why the error message "Antenna 2 Interruption" appears.

I didn't see anything in the documentation that indicated a way to disable the second antenna input.
Did I miss something?
If you can't turn it off, then it shouldn't be a problem.

Here's the car scan:

Code:
Montag,27,Dezember,2010,10:43:24:29830
VCDS Version: RKS 10.6.3
Datenstand: 20101206


Fahrzeugtyp: 1K0
Scan: 01 03 08 09 15 16 17 19 25 42 46 52 56

Fahrzeug-Ident.-Nr.: WV1ZZZ2KZAX039XXX   Kilometerstand: 13750km

01-Motor -- Status: OK 0000
03-Bremsen -- Status: OK 0000
08-Klima/Heizung -- Status: OK 0000
09-Bordnetz -- Status: OK 0000
15-Airbag -- Status: OK 0000
16-Lenkrad -- Status: OK 0000
17-Kombiinstrument -- Status: OK 0000
19-CAN-Gateway -- Status: OK 0000
25-Wegfahrsperre -- Status: OK 0000
42-T¸relektr. Fahrer -- Status: OK 0000
46-Komfortsystem -- Status: OK 0000
52-T¸relektr. Beifahr. -- Status: OK 0000
56-Radio -- Status: Fehler 0010

-------------------------------------------------------------------------------
Adresse 01: Motor        Labeldatei: Keine
   Teilenummer SW: 03G 906 016 LF    HW: 03G 906 016 DR
   Bauteil: R4 2,0L EDC 0000SG  2977 
   Revision: 12345678    Seriennummer: VWX7Z0I73NS075
   Codierung: 0000071
   Betriebsnr.: WSC 35110 377 00160
   VCID: 72E053081429

Keine Fehler gefunden.
Readiness: 0 0 1 1 1

-------------------------------------------------------------------------------
Adresse 03: Bremsen        Labeldatei: RKS\1K0-907-379-MK70M.lbl
   Teilenummer SW: 1K0 907 379 AF    HW: 1K0 907 379 AF
   Bauteil: MABS MK70M          0104 
   Revision: 00H32001   
   Codierung: 0020801
   Betriebsnr.: WSC 35110 377 00160
   VCID: 76E86F187841

Keine Fehler gefunden.

-------------------------------------------------------------------------------
Adresse 08: Klima/Heizung        Labeldatei: 1K0-820-047.lbl
   Teilenummer SW: 2K0 820 047 BM    HW: 2K0 820 047 BM
   Bauteil: Climatic PQ35   143 1515 
   Revision: 00143033    Seriennummer: 00000000000000
   Betriebsnr.: WSC 00000 000 00000
   VCID: 71E25C04112F

Keine Fehler gefunden.

-------------------------------------------------------------------------------
Adresse 09: Bordnetz        Labeldatei: RKS\3C0-937-049-30-M.lbl
   Teilenummer SW: 3C8 937 049 D    HW: 3C8 937 049 D
   Bauteil: Bordnetz-SG     H54 2602 
   Revision: 00H54000    Seriennummer: 01000003297484
   Codierung: 00804F030004100057000000000000000009FB075C000120000000000000
   Betriebsnr.: WSC 35110 377 08192
   VCID: 32609308D4A9

   Teilenummer: 2K1 955 119 C
   Bauteil: Wischer 210809 021  0501 
   Codierung: 00038805
   Betriebsnr.: WSC 35110 

Keine Fehler gefunden.

-------------------------------------------------------------------------------
Adresse 15: Airbag        Labeldatei: RKS\6Q0-909-605-VW52.lbl
   Teilenummer SW: 6Q0 909 605 AH    HW: 6Q0 909 605 AH
   Bauteil: 2Q AIRBAG VW52  025 2400 
   Revision: 06025000    Seriennummer: 0037TR04WBJ3 
   Codierung: 0012881
   Betriebsnr.: WSC 35110 377 00160
   VCID: 7DFA70345D77

Keine Fehler gefunden.

-------------------------------------------------------------------------------
Adresse 16: Lenkrad        Labeldatei: Keine
   Teilenummer SW: 1K0 953 549 CT    HW: 1K0 953 549 CT
   Bauteil: J0527           053 0111 
   Codierung: 0000001
   Betriebsnr.: WSC 35110 377 08192
   VCID: 86089FD888A1

Keine Fehler gefunden.

-------------------------------------------------------------------------------
Adresse 17: Kombiinstrument        Labeldatei: RKS\1K0-920-xxx-17.lbl
   Teilenummer SW: 2K0 920 844 C    HW: 2K0 920 844 C
   Bauteil: KOMBIINSTRUMENT VDD 1222 
   Revision: V0002000    Seriennummer: VWX7Z0I73NS075
   Codierung: 0016101
   Betriebsnr.: WSC 00800 219 194390
   VCID: 2B5E8E6CF383

Keine Fehler gefunden.

-------------------------------------------------------------------------------
Adresse 19: CAN-Gateway        Labeldatei: RKS\1K0-907-530.lbl
   Teilenummer SW: 1K0 907 530 AA    HW: 1K0 907 951
   Bauteil: J533  Gateway   H07 0081 
   Revision:   H07 01    Seriennummer: 240809F1002571
   Codierung: 89801F06000202007400
   Betriebsnr.: WSC 35110 377 00160
   VCID: 66C83F5828E1

Keine Fehler gefunden.

-------------------------------------------------------------------------------
Adresse 25: Wegfahrsperre        Labeldatei: RKS\1K0-920-xxx-25.lbl
   Teilenummer SW: 2K0 920 844 C    HW: 2K0 920 844 C
   Bauteil: IMMO            VDD 1222 
   Revision: V0002000    Seriennummer: VWX7Z0I73NS075
   Betriebsnr.: WSC 00000 000 00000
   VCID: 2B5E8E6CF383

Keine Fehler gefunden.

-------------------------------------------------------------------------------
Adresse 42: T¸relektr. Fahrer        Labeldatei: RKS\1K0-959-701-MIN3.lbl
   Teilenummer SW: 1T0 959 701 T    HW: 1T0 959 701 T
   Bauteil: Tuer-SG         009 2109 
   Codierung: 0000048
   Betriebsnr.: WSC 35110 377 08192
   VCID: 4894D1E04235

Keine Fehler gefunden.

-------------------------------------------------------------------------------
Adresse 46: Komfortsystem        Labeldatei: RKS\1K0-959-433-MIN.clb
   Teilenummer: 1K0 959 433 CP
   Bauteil:    KSG              0401 
   Codierung: 008904087F2D8405484A036000C0
   Betriebsnr.: WSC 35110 377 00160
   VCID: 800489C0AA85

   Bauteil:   Sounder n.mounted     

   Bauteil:       NGS n.mounted     

   Bauteil:      IRUE n.mounted     

Keine Fehler gefunden.

-------------------------------------------------------------------------------
Adresse 52: T¸relektr. Beifahr.        Labeldatei: RKS\1K0-959-702-MIN3.lbl
   Teilenummer SW: 1T0 959 702 R    HW: 1T0 959 702 R
   Bauteil: Tuer-SG         009 2109 
   Codierung: 0000048
   Betriebsnr.: WSC 35110 377 08192
   VCID: 4796D2DC4F2B

Keine Fehler gefunden.

-------------------------------------------------------------------------------
Adresse 56: Radio        Labeldatei: RKS\1K0-035-1xx-56.lbl
   Teilenummer: 1K0 035 186 L
   Bauteil: Radio BVX       010 0022 
   Codierung: 0020200
   Betriebsnr.: WSC 01279 785 00200
   VCID: 2F669A7CC79B

1 Fehler gefunden:
00821 - Antenne 2 f¸r Radio (R93)
            011 - Unterbrechung

Ende   --------------------------------------------------------------------


If anyone has a different idea, I would be grateful for any information.

Sure, here's the translation:

"Dear Christian,"


Translated on 21-07-2026, 2:33.
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Post28-12-2010, 11:35    Subject: Second antenna input, disable Quote

Hello,

In my opinion, the second antenna cannot be disabled because it would negate the purpose of antenna diversity.

Dein Radio versucht bei Dir immer die Antenne zu nutzen, be der der Empfang optimal ist. Details can be found here:
http://de.wikipedia.org/wiki/Antenna-Diversity

Best regards, Rainer.


Translated on 21-07-2026, 2:34.
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Blaumann
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Post28-12-2010, 11:52    Subject: Second antenna input, disable Quote

Hello Rainer,

Thank you for the quick response.
Then we'll leave it like that for now.

Sure, here's the translation:

"Dear Christian,"


Translated on 21-07-2026, 2:35.
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Post28-12-2010, 18:19    Subject: Second antenna input, disable Quote

A diversity tuner is a high-tech solution for improving traditional (analog) FM reception. By processing the signals from both antennas, the tuner creates the functionality of a virtual directional antenna, allowing it to optimize performance in situations with multipath interference (reflections) or interference from neighboring channels.

Not using this technology is almost a waste! You should therefore retrofit the second antenna, which can also be a windshield adhesive antenna or (if not already used as an antenna) the rear window heater. There are quite usable modules available that allow you to use it.
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Translated on 21-07-2026, 2:36.
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Post29-12-2010, 0:18    Subject: Second antenna input, disable Quote

I had temporarily installed the module from Conrad in my Golf to see if I could get a better reception by using the rear window heater as an antenna.

It completely failed/went wrong.
T5 California (CFCA) 4Motion
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Translated on 21-07-2026, 2:37.
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Post29-12-2010, 9:26    Subject: Second antenna input, disable Quote

Hello everyone.

@Hatdriver
It's not my car; I just pointed out the advantages of having a second antenna. But if the owner doesn't want it, what can you do?


Sure, here's the translation:

"Dear Christian,"


Translated on 21-07-2026, 2:37.
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Post29-12-2010, 22:03    Subject: Second antenna input, disable Quote

servusssss wrote:
...
What should one do?


Install a 75-ohm resistor... icon_wink.gif
Gruß Bertil

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*** Technische Anfragen per PN werden von mir nicht beantwortet! ***


Translated on 21-07-2026, 2:38.
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Post30-12-2010, 14:09    Subject: Second antenna input, disable Quote

Hi.


@BertilViewing profile: Bertil
I hadn't thought of that; I'll do it if there isn't a second antenna available.

Sure, here's the translation:

"Dear Christian,"


Translated on 21-07-2026, 2:38.
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powermac
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Post30-12-2010, 15:46    Subject: Second antenna input, disable Quote

But be careful.

To my knowledge, both antenna inputs have a voltage applied to them for powering the phantom load connected to the antennas.
If the radio is connected to that input with the resistor, it will likely be damaged and could burn out due to the power exceeding 2 watts.
A single resistor can get quite hot over time.

Besides, the radio detects this and switches off the voltage to the input.


Translated on 21-07-2026, 2:39.
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Post30-12-2010, 22:29    Subject: Second antenna input, disable Quote

Okay! Therefore, check if the phantom power supply can be turned off, and also whether it is automatically switched off (and only for that specific output!) in case of a (near) "short circuit" on the antenna cable.
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Translated on 21-07-2026, 2:40.
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Post30-12-2010, 23:41    Subject: Second antenna input, disable Quote

powermac wrote:
But be careful.

To my knowledge, both antenna inputs have a voltage applied to them for powering the phantom load connected to the antennas.
...


Correct, but those who can do calculations are clearly at an advantage icon_wink.gif.
At 75 ohms and a voltage of 12V, the current is 160mA. It only registers as a short circuit at around 250mA (at least, that's what we always tested for).

However, phantom power can only be disabled by short-circuiting a diode.

Even a 150 or 200 ohm resistor should work.
Gruß Bertil

Skoda 5E5 CZDA + Mini R50 W10 + VW ID.3 + Fiat Ducato 250 + 161 DX

*** Technische Anfragen per PN werden von mir nicht beantwortet! ***


Translated on 21-07-2026, 2:41.
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