# How to use 5Ghz band ? Low rate  ?

**URL:** <https://forums.digi.com/t/how-to-use-5ghz-band-low-rate/6077>\
**Category:** NET+OS\
**Created:** [April 14, 2009, 9:34am UTC](https://forums.digi.com/t/how-to-use-5ghz-band-low-rate/6077 "2009-04-14T09:34:39Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![Christophe1](https://avatars.discourse-cdn.com/v4/letter/c/b3f665/32.png) [@Christophe1](https://forums.digi.com/u/Christophe1)\
**Post date:** [April 14, 2009, 9:34am UTC](https://forums.digi.com/t/how-to-use-5ghz-band-low-rate/6077/1 "2009-04-14T09:34:39Z")

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Hi,

It’s not really the correct place to post this message but there is not ConnectCore Wi-9P forum yet. Sorry.  
I have a ConnectCore Wi-9P 9215 evaluation board with NET+OS 7.4.2. Wifi module works in B/G band, but I would like to test the A band. I have changed the parameter in the property of the project but when I start the application it’s always written : “Frequency band is band bg only”, why ?  
I only have a 9Mbits/s rate (the transmitter and receiver are just side by side), is there any options to accelerate the rate ?

Thanks

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**Author:** ![charliek](https://avatars.discourse-cdn.com/v4/letter/c/94ad74/32.png) [@charliek](https://forums.digi.com/u/charliek)\
**Post date:** [April 14, 2009, 4:19pm UTC](https://forums.digi.com/t/how-to-use-5ghz-band-low-rate/6077/2 "2009-04-14T16:19:53Z")

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The best way to force the wireless into a mode you want is to use the API functions wln\_get\_params and wln\_set\_params. See the API reference for details.

I.E.:

- get the params
- change the band to WLN\_BAND\_A (forces it to band A)
- change the tx\_rate to 0 (use the best rate available - you should also check what your AP is set for)
- set the params
- reboot

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<div class="post-metadata">

**Author:** ![Christophe1](https://avatars.discourse-cdn.com/v4/letter/c/b3f665/32.png) [@Christophe1](https://forums.digi.com/u/Christophe1)\
**Post date:** [April 15, 2009, 1:31pm UTC](https://forums.digi.com/t/how-to-use-5ghz-band-low-rate/6077/3 "2009-04-15T13:31:21Z")

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When I set the channel between 17 and 51, is it mean that I use the 5Ghz band ?  
The problem is that the communication is established with a channel between 17 and 51 but it’s a 2.4Ghz antenna that is connected to the board, I’m surprised of that ??  
But if I connect the 5Ghz antenna I don’t have the same rx\_rate (its’ higher with the 5GHz antenna).

Thanks

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**Author:** ![Christophe1](https://avatars.discourse-cdn.com/v4/letter/c/b3f665/32.png) [@Christophe1](https://forums.digi.com/u/Christophe1)\
**Post date:** [April 15, 2009, 2:23pm UTC](https://forums.digi.com/t/how-to-use-5ghz-band-low-rate/6077/4 "2009-04-15T14:23:27Z")

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Argh, in fact, the 5GHz antenna works also in 2.4GHz, so it’s OK for the fact that the communication is established.  
So just one question : when I set the channel between 17 and 51, is it mean that I use the 5Ghz band (I don’t change the band parameter) ?

Thanks