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GSM module poor reception
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 Posted: Saturday Feb 17th, 2018 12:34 pm
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phil1155
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Hello ,I just installed a GSM4 module. I am struggling finding a good position for the antenna and get a better reception. The log indicates a lot of trouble/restore messages.The best I have so far is a signal strength 2.

1- Is there a way to lock the module on 2G?

2- My antenna is very closed to the roof. So adding the adm02 modules should not help me I guess. Would it be possible to expand the antenna cable and put it outside on the roof? Or would an external and amplified antenna would be a solution?Ant recommended product?Thank you for your

help

Philippe

Last edited on Saturday Feb 17th, 2018 01:05 pm by



 Posted: Saturday Feb 17th, 2018 01:46 pm
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slychiu
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1- Is there a way to lock the module on 2G? No it will lock onto the network of the sim card. If 3G is weak it should fallback to 2G



2- My antenna is very closed to the roof. So adding the adm02 modules should not help me I guess. Would it be possible to expand the antenna cable and put it outside on the roof? Or would an external and amplified antenna would be a solution?Ant recommended product?Thank you for your

ADM02 can still help by allowing the UCM/GSM4 module to be located in a better position

There are some who have just extended the antenna cable by cutting and joining the cablee, buy I am not sure how well that would work in general

We have another antenna which is a higher gain type see attached image
in our testing it has increased the level by 1.





Attachment: JCG24.jpg (Downloaded 23 times)



 Posted: Saturday Feb 17th, 2018 04:27 pm
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phil1155
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Thanks Chiu, I will find one antenna and try. I wonder I should maybe buy a repeater (I have also the reception problem with my cell phones). But there are bloody expensive.



 Posted: Monday Feb 19th, 2018 07:22 pm
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phil1155
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Chiu, what type of antenna connector is on the gsm4 module ( mmcx, mcx ??)
Thanks



 Posted: Monday Feb 19th, 2018 07:29 pm
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slychiu
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Mmcx



 Posted: Thursday Feb 22nd, 2018 07:08 pm
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phil1155
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Just placed a better antenna. Got now a "Strength 3". Works fine now. Thanks Chiu

Last edited on Thursday Feb 22nd, 2018 07:09 pm by phil1155



 Posted: Friday Feb 23rd, 2018 07:22 am
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slychiu
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Great. Where did you get the antenna in case others need?



 Posted: Friday Feb 23rd, 2018 01:26 pm
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phil1155
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http://www.mhzshop.com/shop/index.php?cl=details&anid=d484e08979ab10c19.50627593
This is the model I selected. Not a single trouble/restore in the last 12 hours.Works perfect now (voice and sms).Cheers



 Posted: Saturday Feb 24th, 2018 07:04 am
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slychiu
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That is an interesting device. Did you have to change the connector to MMCX or doe it come with? It does not state that it has MMCX



 Posted: Thursday Mar 1st, 2018 07:56 pm
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phil1155
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Sorry, I missed that.I had to buy a pigtail coming with a mcmx connector ( as the antenna comes with a different connector).Still working great with  Strength 3.



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