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Share a fresh thought about the 3G modem (problem)


There is a problem with the modem, I have already tried a bunch of everything, advise what else to do to finally make sure that the modem is to blame.

The problem is unstable signal reception. A terrible noise on EC / LO, although before everything worked fine.

What I tried:

1. I had a Sierra 598U modem, worked fine for more than 2 years, then I started to receive a signal badly. Well, I thought it was time to change it. Finally, I fried it in the oven, I thought somewhere a soldering defect)))
In short, I bought a new one of the same model, the tal is better to work, but it’s wildly sausage connection.

2. Changed the adapter from the external antenna to the modem.

3. Changed the cable from the antenna

4. A million times examined the entire antenna (It costs 24 dB)

5. I tried on another computer and with a different antenna (the same problems).

6. Reloaded the PRL file

7. Disabled diversification (internal antenna), as well as 1X mode

8. Of course, I twisted the antenna on different towers and carefully searched for the BS on Axesstel

9. Dismantled the modem, looked at the external antenna connector.

What I did not do was not flashing, but I do not know if it will help. In addition, I do not have access to CHAP_SS, and the seller refuses.
What parameters are in the firmware that may lead to such consequences?
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Author
The fears were confirmed, finally found the reason)

He pulled out the modem, set it, the connection again terribly sausages. I upload the PRL file, the connection appears, the Internet works, everything is fine) So now you have to upload this file every time before connecting. Sad :(

What is it? How to fix the settings?
Author
That question was on a different occasion. I replaced my wife with an antenna from 17 dB to 24 dB. I solved that problem.

The frequency of operation is 800 MHz, I kind of said.

The antenna takes, but it is not clear what. Pilots gallop, as if something is jamming her. This joke began in May, like or June.
And I smoked the last modem because it almost didn’t take anything at all, and when I burned each chip with a soldering iron, it started working, but not for long. I threw it in the email. the oven, but missed a little, the textolite deformed smoke

Now the modem seems to have worked at last, reloaded the PRL file again (this is the one with frequencies). I'm afraid to distort the modem now. Maybe the memory is stuck in it and the parameters get lost?
ETOGES was last year in Temko "Question on 3G antennas"
Insecure reception area. What frequency is the base at? We never found out ...
Antenna pointed (narrowband) does not take the base frequency (?) Behind the reception band.
And yes, of course, "reflash" and fry a scarf! Maybe help xaxa

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