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servusssss Blaumann

Joined: 11/14/2006 Posts: 159 Karma: +12 / -0 Location: Vlbg
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28-12-2010, 10:50 Subject: Second antenna input, disable |
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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 --------------------------------------------------------------------
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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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dieselschrauber Administrator


Joined: 04/12/2002 Posts: 18063 Karma: +797 / -0 Location: St.Gallen 2018 Volkswagen T6 
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28-12-2010, 11:35 Subject: Second antenna input, disable |
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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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servusssss Blaumann

Joined: 11/14/2006 Posts: 159 Karma: +12 / -0 Location: Vlbg
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28-12-2010, 11:52 Subject: Second antenna input, disable |
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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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Hutfahrer Schrauber


Joined: 10/22/2005 Posts: 7812 Karma: +1090 / -0 Location: BAR
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28-12-2010, 18:19 Subject: Second antenna input, disable |
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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. Automobile Zeitzeugen: |SUZUKI Swift Sport (2008)| |Smart 450 (2002)| |Honda CB 125 F (2018)|
Translated on 21-07-2026, 2:36.
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michiglaser Blaumann

Joined: 05/03/2007 Posts: 274 Karma: +6 / -0 Location: Lkr. KEH 2007 Audi A4 Avant Premium Support
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29-12-2010, 0:18 Subject: Second antenna input, disable |
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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
A4 B8 Avant (CDUC)
G4 (ASZ), T4 (AXG)
Translated on 21-07-2026, 2:37.
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servusssss Blaumann

Joined: 11/14/2006 Posts: 159 Karma: +12 / -0 Location: Vlbg
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29-12-2010, 9:26 Subject: Second antenna input, disable |
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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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Bertil Profi-Schrauber

Joined: 04/15/2002 Posts: 5628 Karma: +108 / -0
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29-12-2010, 22:03 Subject: Second antenna input, disable |
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servusssss wrote: | ...
What should one do?
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Install a 75-ohm resistor...  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, 2:38.
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servusssss Blaumann

Joined: 11/14/2006 Posts: 159 Karma: +12 / -0 Location: Vlbg
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30-12-2010, 14:09 Subject: Second antenna input, disable |
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Hi.
@ 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 Guest
Free account, no CAN development support
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30-12-2010, 15:46 Subject: Second antenna input, disable |
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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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Hutfahrer Schrauber


Joined: 10/22/2005 Posts: 7812 Karma: +1090 / -0 Location: BAR
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30-12-2010, 22:29 Subject: Second antenna input, disable |
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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. Automobile Zeitzeugen: |SUZUKI Swift Sport (2008)| |Smart 450 (2002)| |Honda CB 125 F (2018)|
Translated on 21-07-2026, 2:40.
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Bertil Profi-Schrauber

Joined: 04/15/2002 Posts: 5628 Karma: +108 / -0
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30-12-2010, 23:41 Subject: Second antenna input, disable |
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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  .
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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