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

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

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

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

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:

> 
> 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

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:
> 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

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.
> 
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

<bokiteam@ms21.hinet.net> wrote in message
news:1142340716.391723.182360@i39g2000cwa.googlegroups.com...
> You will think it again when you encounter that.

Well, actually I never encounter that. When I design something, I always
have datesheets of IC's/modules etc.etc. at hand. If not available, I simply
do not use that part.

What exactly are you designing? Is it business or hobby?

> Provide part number? I wish I can.

I don't get this. You are using an RF transmitter with some sort of
interface. If you don't have a datasheet of that transmitter, how on earth
are you going to use that thing. If you do have a datasheet, it is
apparently incomplete, but you must have some sort of typenumber of the
thing. Right?

Meindert

<bokiteam@ms21.hinet.net> a &#4294967295;crit 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.


-- 
Thanks,
Fred.