Re: [PATCHv7 7/9] FMTx: si4713: Add files to handle si4713 i2c device

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On Tue, Jun 16, 2009 at 01:30:08PM +0200, Nurkkala Eero.An (EXT-Offcode/Oulu) wrote:
> On Tue, 2009-06-16 at 13:22 +0200, ext Hans Verkuil wrote:
> > On Tuesday 16 June 2009 13:06:09 Eduardo Valentin wrote:
> > > On Sun, Jun 14, 2009 at 02:31:55PM +0200, ext Hans Verkuil wrote:
> > > > > +     if (rval < 0)
> > > > > +             goto exit;
> > > > > +
> > > > > +     /* TODO: How to set frequency to measure current signal length
> > > > > */
> > > >
> > > > Huh? I don't understand this TODO.
> > >
> > > The todo is about the property this device had, to report signal length
> > 
> > 'signal length' or 'signal strength'? If it is the former, then I don't 
> > understand what you mean with that term.
> > 
> > > of a freq. It used to work like: user echoes the freq on sysfs entry.
> > > when reading the same entry, it reports the signal noise there.
> > >
> > > This is something which I still don't know the proper place to put.
> > >
> > > I thought in another ext control. But I don't know if this fix into
> > > the fm tx controls. Maybe I should use a private one ?
> > 
> > I need to understand this better first.
> > 
> > Regards,
> > 
> > 	Hans
> > 
> 
> Transmitter turns into a receiver and measures the RSSI level of
> the frequency. If it's high (< -90 -100dB), it's probably not a good
> idea to transmit any on such frequency as the interference is too great.

Yes, sorry I've made some really bad phrasing. It is Strength. It is a
feature to measure Received Signal Strength Indication (RSSI). As mentioned
by Eero, it's not a good idea to transmit any on freq which the measurement is being done.

> 
> - Eero

-- 
Eduardo Valentin
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