Programmable RF modulator

Hi all.

I'm not an expert in electronics, I'm a software developer - so bear
with me. I have a question, however, for those who are experts in
electronics - so any input (any) would be highly valued.

I understand the very basics of an RF modulator or RF switch, I think
- though that's about the extent of it. An RF modulator/switch
basically allows me to turn a non-RF single into some RF carrier
signal that can be consumed by, say, a television. By placing a RF
modulator between a coaxial that would normally go into a television,
and telling the modulator what channel I wish to transmit on, I can
get the TV tuner to pick up my signal instead of the one coming from
the wall (sort of like the old Nintendos - the RF modulator at the end
of those).

In looking around, however, I cannot find any that are programmable
through a serial interface, a USB interface, etc. Every RF modulator I
can find online forces people to punch the channel they wish to send
on via some kind of interface on the box itself. I woud like to
control what output channel the RF modulator lets me send to
programmatically, or from within my software.

Is anyone aware of such a beast? And if so, can I have some pointers/
websites/etc. Any information would be valued, even if it is telling
me this is the wrong newsgroup.

Thanks so much in advance,

Ben

 

[Jack]

There seem to be several available at the chip level but I suspect that they
are not what you're looking for.
http://www.datasheetcatalog.com/datasheets_pdf/T/D/A/8/TDA8822.shtml
http://www.eeproductcenter.com/rf-micro/brief/showArticle.jhtml?articleID=196802770
You might inquire at these manufacturers to see if they are aware of an
available product or they may have an application note on creating one.


<kwendex@yahoo.com> wrote in message
news:1170376594.888093.46970@s48g2000cws.googlegroups.com...

Hi all.

I'm not an expert in electronics, I'm a software developer - so bear
with me. I have a question, however, for those who are experts in
electronics - so any input (any) would be highly valued.

I understand the very basics of an RF modulator or RF switch, I think
- though that's about the extent of it. An RF modulator/switch
basically allows me to turn a non-RF single into some RF carrier
signal that can be consumed by, say, a television. By placing a RF
modulator between a coaxial that would normally go into a television,
and telling the modulator what channel I wish to transmit on, I can
get the TV tuner to pick up my signal instead of the one coming from
the wall (sort of like the old Nintendos - the RF modulator at the end
of those).

In looking around, however, I cannot find any that are programmable
through a serial interface, a USB interface, etc. Every RF modulator I
can find online forces people to punch the channel they wish to send
on via some kind of interface on the box itself. I woud like to
control what output channel the RF modulator lets me send to
programmatically, or from within my software.

Is anyone aware of such a beast? And if so, can I have some pointers/
websites/etc. Any information would be valued, even if it is telling
me this is the wrong newsgroup.

Thanks so much in advance,

Ben

 

[jasen]

On 2007-02-02, kwendex@yahoo.com <kwendex@yahoo.com> wrote:

Hi all.

In looking around, however, I cannot find any that are programmable
through a serial interface, a USB interface, etc. Every RF modulator I
can find online forces people to punch the channel they wish to send
on via some kind of interface on the box itself. I woud like to
control what output channel the RF modulator lets me send to
programmatically, or from within my software.

Is anyone aware of such a beast?

many VCRs include one (those with UHF output mainly)
it's scontrolled by the software in the vcr...

I'm not aware of one that's ready to use off-the-shelf.

Bye.
Jasen