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GSM module poor reception

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GSM module poor reception
phil1155 Offline
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#1
02-17-2018, 12:34 PM (This post was last modified: 02-17-2018, 01:05 PM by slychiu.)
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
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slychiu Offline
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#2
02-17-2018, 01:46 PM
Quote: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



Quote: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.







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phil1155 Offline
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#3
02-17-2018, 04:27 PM
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.
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phil1155 Offline
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#4
02-19-2018, 07:22 PM
Chiu, what type of antenna connector is on the gsm4 module ( mmcx, mcx ??)
Thanks
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slychiu Offline
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#5
02-19-2018, 07:29 PM
Mmcx
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phil1155 Offline
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#6
02-22-2018, 07:08 PM (This post was last modified: 02-22-2018, 07:09 PM by phil1155.)
Just placed a better antenna. Got now a \"Strength 3\". Works fine now. Thanks Chiu
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slychiu Offline
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#7
02-23-2018, 07:22 AM
Great. Where did you get the antenna in case others need?
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phil1155 Offline
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#8
02-23-2018, 01:26 PM
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
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slychiu Offline
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#9
02-24-2018, 07:04 AM
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
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phil1155 Offline
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#10
03-01-2018, 07:56 PM
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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