RF Transmitter register setting.

bokiteam@ms21.hinet.net wrote:
> Hi All,
> 
> To control a RF transmitter, I have to set its synthesizer paramter N:
> 
> N = (fTX + foffset) / Xclk
> 
> 
> we know foffset and Xclk, it is easy to get N when I set any fTX.
> 
> but the problem is, there is a register called:
> 
> Local oscillator frequency extension.
> 
> It has 2 bits for different range frequency.
> 
> Why do I need this?
> 
> If chip already know my target frequency, why should I tell him another
> information...
> 
> the point is, I still don't know what is this register for ..
> 
> For synthesizer, I have N... so what is that for ....
> 
> 
> Best regards,
> Boki.
> 
Is that a register input or output? Is it seen at other output pins on 
your module? It may be for selecting different bands of operation or for 
controlling/switching/selecting external circuitry such as filters or LO's.

Ken

Fred Bartoli wrote:
> <bokiteam@ms21.hinet.net> a =E9crit dans le message de
> news:1142340969.033534.200990@i39g2000cwa.googlegroups.com...
> > Can I use oscilloscope to measure the antenna directly ? ( it was on
> > board on PCB)
> >
> >
>
> Yes, you can use a scope to measure your antenna.
> Just put the scope and the antenna side by side. When you got how much
> fraction of the scope length the antenna is, just check the scope length
> into its datasheet and multiply it by the fractional number.
> Voila, you've measured the antenna with the scope.
>=20
>=20
> --=20
> Thanks,
> Fred.

I got it, thanks a lot!

BR
/Boki.

bokiteam@ms21.hinet.net wrote:
> Hi All,
> 
> To control a RF transmitter, I have to set its synthesizer paramter N:
> 
> N = (fTX + foffset) / Xclk
> 
> 
> we know foffset and Xclk, it is easy to get N when I set any fTX.
> 
> but the problem is, there is a register called:
> 
> Local oscillator frequency extension.
> 
> It has 2 bits for different range frequency.
> 
> Why do I need this?
> 
> If chip already know my target frequency, why should I tell him another
> information...
> 
> the point is, I still don't know what is this register for ..
> 
> For synthesizer, I have N... so what is that for ....
> 
> 
> Best regards,
> Boki.
> 

For Tx offset.
Ed

ehsjr wrote:
> bokiteam@ms21.hinet.net wrote:
> > Hi All,
> >
> > To control a RF transmitter, I have to set its synthesizer paramter N:
> >
> > N = (fTX + foffset) / Xclk
> >
> >
> > we know foffset and Xclk, it is easy to get N when I set any fTX.
> >
> > but the problem is, there is a register called:
> >
> > Local oscillator frequency extension.
> >
> > It has 2 bits for different range frequency.
> >
> > Why do I need this?
> >
> > If chip already know my target frequency, why should I tell him another
> > information...
> >
> > the point is, I still don't know what is this register for ..
> >
> > For synthesizer, I have N... so what is that for ....
> >
> >
> > Best regards,
> > Boki.
> > 
> 
> For Tx offset.
> Ed

I guess so...

BR
/Boki.

bokiteam@ms21.hinet.net wrote:

> 
> ehsjr wrote:
>> bokiteam@ms21.hinet.net wrote:
>> > Hi All,
>> >
>> > To control a RF transmitter, I have to set its synthesizer paramter N:
>> >
>> > N = (fTX + foffset) / Xclk
>> >
>> >
>> > we know foffset and Xclk, it is easy to get N when I set any fTX.
>> >
>> > but the problem is, there is a register called:
>> >
>> > Local oscillator frequency extension.
>> >
>> > It has 2 bits for different range frequency.
>> >
>> > Why do I need this?
>> >
>> > If chip already know my target frequency, why should I tell him another
>> > information...
>> >
>> > the point is, I still don't know what is this register for ..
>> >
>> > For synthesizer, I have N... so what is that for ....
>> >
>> >
>> > Best regards,
>> > Boki.
>> > 
>> 
>> For Tx offset.
>> Ed
> 
> I guess so...
> 
> BR
> /Boki.
> 
RTF datasheet.
-- 
JosephKK
Gegen dummheit kampfen die Gotter Selbst, vergebens.  
--Schiller

Joseph2k =E5=AF=AB=E9=81=93=EF=BC=9A

> bokiteam@ms21.hinet.net wrote:
>
> >
> > ehsjr wrote:
> >> bokiteam@ms21.hinet.net wrote:
> >> > Hi All,
> >> >
> >> > To control a RF transmitter, I have to set its synthesizer paramter =
N:
> >> >
> >> > N =3D (fTX + foffset) / Xclk
> >> >
> >> >
> >> > we know foffset and Xclk, it is easy to get N when I set any fTX.
> >> >
> >> > but the problem is, there is a register called:
> >> >
> >> > Local oscillator frequency extension.
> >> >
> >> > It has 2 bits for different range frequency.
> >> >
> >> > Why do I need this?
> >> >
> >> > If chip already know my target frequency, why should I tell him anot=
her
> >> > information...
> >> >
> >> > the point is, I still don't know what is this register for ..
> >> >
> >> > For synthesizer, I have N... so what is that for ....
> >> >
> >> >
> >> > Best regards,
> >> > Boki.
> >> >
> >>
> >> For Tx offset.
> >> Ed
> >
> > I guess so...
> >
> > BR
> > /Boki.
> >
> RTF datasheet.
> --
> JosephKK
> Gegen dummheit kampfen die Gotter Selbst, vergebens.
> --Schiller

What is RTF.....

BR/
Boki.

bokiteam@ms21.hinet.net wrote:
> Joseph2k 寫道：

>>RTF datasheet.
> 
> What is RTF.....

Google for "RTFM". He simply replaced the "M" (Manual) with "Datasheet".

Hi fool,

I said there is no description already.



Joseph2k =E5=AF=AB=E9=81=93=EF=BC=9A

> bokiteam@ms21.hinet.net wrote:
>
> >
> > ehsjr wrote:
> >> bokiteam@ms21.hinet.net wrote:
> >> > Hi All,
> >> >
> >> > To control a RF transmitter, I have to set its synthesizer paramter =
N:
> >> >
> >> > N =3D (fTX + foffset) / Xclk
> >> >
> >> >
> >> > we know foffset and Xclk, it is easy to get N when I set any fTX.
> >> >
> >> > but the problem is, there is a register called:
> >> >
> >> > Local oscillator frequency extension.
> >> >
> >> > It has 2 bits for different range frequency.
> >> >
> >> > Why do I need this?
> >> >
> >> > If chip already know my target frequency, why should I tell him anot=
her
> >> > information...
> >> >
> >> > the point is, I still don't know what is this register for ..
> >> >
> >> > For synthesizer, I have N... so what is that for ....
> >> >
> >> >
> >> > Best regards,
> >> > Boki.
> >> >
> >>
> >> For Tx offset.
> >> Ed
> >
> > I guess so...
> >
> > BR
> > /Boki.
> >
> RTF datasheet.
> --
> JosephKK
> Gegen dummheit kampfen die Gotter Selbst, vergebens. =20
> --Schiller