[bookport] Re: Battery draining issue
- From: "Grant Hardy" <grant_r_hardy@xxxxxxxx>
- To: <bookport@xxxxxxxxxxxxx>
- Date: Thu, 31 Mar 2005 17:03:56 -0800
This is really creepy. I wonder what's going on.
----- Original Message -----
From: "Joseph Norton" <joenorton1@xxxxxxxxxxx>
To: <bookport@xxxxxxxxxxxxx>
Sent: Thursday, March 31, 2005 4:02 PM
Subject: [bookport] Battery draining issue
> Well, I downgraded to 1.20.20 and the behavior of the BP as to the
> electromagnetic emissions from the unit when it is in standby is now the
> same as before the battery draining issue was reported. Now, the unit,
> when in standby is emitting the rythmic buzzing noises as reported earlier
> with stable firmware. I really think there's something to this. See my
> earlier message below for details.
>
>
> On Wed, 30 Mar 2005, Joseph Norton wrote:
>
>> Hi APH staff and listers:
>>
>> Well, all this talk about battery drainage made me think of an experiment
>> which has yielded helpful data in the past and may even now.
>>
>> I decided to get out my trusty telephone pick-up coil which I normally
>> have
>> stuck on the back of my computer to clue me in to what my computer may be
>> doing behind my back. I got it out and placed it onto my Bookport and
>> noticed a difference in the electromagnetic noise generated by the
>> Bookport
>> when it's supposed to be asleep. With the latest firmware, all I hear is
>> a
>> kind-of hiss when the Bookport is supposed to be powered off--the same
>> noise
>> is also heard when plugged into the USB connection except when files are
>> being transfered which generates some noise also. Anyway, I got to
>> wondering
>> if this was the same noise heard with the stable 1.20 firmware when the
>> unit
>> is powered off. So, I reverted back to 1.20 and noticed there was a
>> change
>> in the interference when the Bookport is supposed to be asleep. With
>> 1.20,
>> the noise picked up by my pick-up coil is a kind-of buzzing sound which
>> varies in pitch from slightly higher to lower every half-second. Kind-of
>> like a siren, but, much lower. I went back to 1.20.22 and found that
>> with
>> 1.20.22 beta, the buzzing noise is gone--there's just a soft hissing
>> noise
>> when the unit is asleep. This sounds much quieter than the noise I got
>> from
>> 1.20 stable, but, it does seem to be different behavior, for whatever
>> that's
>> worth.
>>
>> You all may think I'm nuts, but, that pick-up coil has clued me into a
>> lot of
>> things over the years, so I am tossing my observations out there.
>>
>> Hope this helps.
>>
>
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