Hello,
> You want the second option. I can't remember the exact jumper right now, but
> it's in the manual.
I agree if JP7 is not present this could be causing the problem, if you are
supplying the TS-760 regulated 5V, JP7 should be present.
//Eddie
> On 8-Dec-06, at 11:19 AM, naturalwatt wrote:
>
>> I have now finally got an aerial connection to my GSM modem, and it seems
>> that the
>> transmission causes the 7260 to reset - about every 20 seconds!
>>
>> Setup: 7260, Modem-2 daughterboard, Multitech GSM/GPRS socket modem,
>> 900/1800MHz.
>>
>> With the SIM inserted and an aerial plugged in, the 7260 resets itself
>> about every 20
>> seconds. There is nothing logged to the console on /dev/ttyAM0 apart from
>> the startup
>> messages.
>>
>> If I unplug the aerial OR remove the SIM it doesn't happen. It can't be a
>> software problem
>> as the modem is simply seen as a serial device, /dev/tts/3. There's no
>> software running
>> that interacts with the serial port when it resets.
>>
>> I have another system, a 7250, plugged into the same 12V power supply which
>> runs
>> perfectly, so it's not off-board power supply. The voltage at the power pin
>> to the modem
>> is 5.00 V, so it's probably not on board power sagging too low.
>>
>> Interestingly, although it's a 5V modem, I initially plugged it in at 3.3V,
>> and it seemed to
>> work except it could not access the SIM.
>>
>> I am suspecting the radio transmision is causing the CPU to reset, but I
>> don't know what to
>> do about it.
>>
>> This 7260 is not in its enclosure, but sitting bare on the bench. However,
>> the 7250 is
>> about the same distance from the aerial and is not affected. Putting the
>> 7260 into its
>> enclosure does not change things; it still resets and the 7250 (not
>> enclosed) doesn't.
>>
>> I assume *someone* has used a GSM modem with a 7250/7260 before?
>>
>> Martin
>>
>>
>>
>
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