# Fwd: Ais\_rx

**URL:** <https://www.ruby-forum.com/t/fwd-ais-rx/234513>\
**Category:** GNU Radio\
**Created:** [March 10, 2015, 2:19pm UTC](https://www.ruby-forum.com/t/fwd-ais-rx/234513 "2015-03-10T14:19:45Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![addis\_a](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/a/c4cdca/32.png) [@addis\_a](https://www.ruby-forum.com/u/addis_a)\
**Post date:** [March 10, 2015, 2:19pm UTC](https://www.ruby-forum.com/t/fwd-ais-rx/234513/1 "2015-03-10T14:19:45Z")

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---------- Forwarded message ----------  
From: Vladimir M. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid)  
Date: 2015-03-08 13:26 GMT+02:00  
Subject: Re: [Discuss-gnuradio] Ais\_rx  
To: Nick F. ‫‎[removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid)‎‬

Hello Nick

What does it mean?

I’m understand what parameters is are default.

Does something special must be write in command line?

i.e: $ ais\_rx –XX –XX ….???

BR

Vladimir

2015-03-04 19:33 GMT+02:00 Nick F. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid):

> Possible reasons:
> 
> 1. Inadequate antenna
> 2. No line of sight to transmitting ships
> 3. Incorrect subdevice or antenna specification
> 
> –n

On Wed, Mar 4, 2015 at 3:15 AM, Vladimir M. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid)  
wrote:

> – Asking for clock rate 32.000000 MHz…
> 
> – Successfully tuned to 162.000000 MHz
> 
> * * *
> 
> Discuss-gnuradio mailing list  
> removed\_email\_address@domain.invalid  
> [Discuss-gnuradio Info Page](https://lists.gnu.org/mailman/listinfo/discuss-gnuradio)

–  
Best  
Regards  
Vladimir

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**Author:** ![popolzen](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/p/c0e974/32.png) [@popolzen](https://www.ruby-forum.com/u/popolzen)\
**Post date:** [March 10, 2015, 2:55pm UTC](https://www.ruby-forum.com/t/fwd-ais-rx/234513/2 "2015-03-10T14:55:49Z")

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Hi Vladimir,

What are you referring to? If its:

> 1. Incorrect subdevice or antenna specification  
> see  
> [USRP Hardware Driver and Device Manual: Configuring Devices and Streamers](http://files.ettus.com/manual/page_configuration.html#config_subdev)  
> Hint: the light next to the connector leading to your antenna should be  
> emitting a clear green glow.

Most likely is really that you don’t pick up significant signal from any  
ships because your antenna doesn’t work sufficiently well.  
What kind of antenna do you use?

Best regards,  
Marcus