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AIR-BR1310 with frequency 1575 Mhz

Hi.

I have connected the AIR-BR1310G and one meter apart I installed a GPS antenna. When the AIR-BR1310G is up, the GPS stop detecting satellites. Using a spectrum analyzer I found that the AIR-BR1310G transmits a frequency of 1575 MHz along with the normal 2.4 GHz one. How can I eliminate this annoying 1575 MHz signal from the AIR-BR1310G?

Thank.

8 REPLIES 8
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Cisco Employee

You cannot. This behavior is not normal.

What is the signal strenght of the emission in 1575mhz ? If you shut down the bridge radio, it also stops ?

Nicolas

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Hi Nicolas.

I shut down the bridge radio and the frequency 1575 Mhz is still there. This situation ocurred with all the APs we tested.

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How do you know that it's the 1310 emitting this signal ?

And since this frequency is the GPS frequency, I would consider normal to see a signal there everywhere in the world since it's the signal transmitted by the satellites continuously. Am I missing something ?

Nicolas

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Hi Nicolas.

This signal is issued by the team because through a spectrum analyzer could detect it. The spectrum analyzer receives this frequency when the AP is next

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You said that with the radio down, it was still there. Can you try unplugging the power of the 1310 and see if signal is still present ??

Nicolas

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Hello Nicolas.

When i unplugging the power of the 1310, the frequency 1575 Mhz disappears, when i plugging the power of the 1310, the frequency 1575 Mhz appears.

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Was any resolution found to get rid of the 1575MHz emissions (apart from powering the unit off)?

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did you try unplugging the coax cables from the bridge inn order to determine if maybe is just the power injector or the bridge it self.?

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