# WS6318 exceed maximum VSWR, blow-up?

**URL:** <https://forum.sierrawireless.com/t/ws6318-exceed-maximum-vswr-blow-up/7257>\
**Category:** Legacy AirPrime modules\
**Created:** [June 16, 2014, 10:20am UTC](https://forum.sierrawireless.com/t/ws6318-exceed-maximum-vswr-blow-up/7257 "2014-06-16T10:20:13Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![Torello](https://avatars.discourse-cdn.com/v4/letter/t/ebca7d/32.png) [@Torello](https://forum.sierrawireless.com/u/Torello)\
**Post date:** [June 16, 2014, 10:20am UTC](https://forum.sierrawireless.com/t/ws6318-exceed-maximum-vswr-blow-up/7257/1 "2014-06-16T10:20:13Z")

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Hi,

The specs state a maximum VSWR of 1.5:1 for the WS6138  
That quite difficult to reach when applying the module in a tiny mobile measurement device.  
What happens when this maximum is exceeded? I understand that the radio link will not be that good.  
But my main concern is:

- Will I damage, blow up the transmitter circuitry in the module?

regards,  
Edwin

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**Author:** ![Rex\_alex](https://avatars.discourse-cdn.com/v4/letter/r/73ab20/32.png) [@Rex\_alex](https://forum.sierrawireless.com/u/Rex_alex)\
**Post date:** [June 18, 2014, 2:00pm UTC](https://forum.sierrawireless.com/t/ws6318-exceed-maximum-vswr-blow-up/7257/2 "2014-06-18T14:00:53Z")

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Hi,

I suppose it can cause some interference may be… need to check if it can have such serious consequences… never heard as such…

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**Author:** ![Torello](https://avatars.discourse-cdn.com/v4/letter/t/ebca7d/32.png) [@Torello](https://forum.sierrawireless.com/u/Torello)\
**Post date:** [June 19, 2014, 11:07am UTC](https://forum.sierrawireless.com/t/ws6318-exceed-maximum-vswr-blow-up/7257/3 "2014-06-19T11:07:53Z")

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Hi,

Please if you would.  
It will be used in GPS-loggers and we can’t repair if it breaks down. The loggers are used on birds and far, far away.

Thanks in advance.

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**Author:** ![Rex\_alex](https://avatars.discourse-cdn.com/v4/letter/r/73ab20/32.png) [@Rex\_alex](https://forum.sierrawireless.com/u/Rex_alex)\
**Post date:** [July 2, 2014, 1:46pm UTC](https://forum.sierrawireless.com/t/ws6318-exceed-maximum-vswr-blow-up/7257/4 "2014-07-02T13:46:41Z")

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Hi,

Yes it can have some serious consequences. Module might even break.

Thanks