Showing posts with label drm. Show all posts
Showing posts with label drm. Show all posts

Thursday, October 15, 2009

DRM RX considerations

Some ideas settled into a first design idea.

I'll be using inverters, such a 7404, maybe LS.
The oscillator will be a Pierce design.
The attempt will be to use as many gates of the inverter linearised.

As soon as there's more, I'll provide an update.

Wednesday, October 14, 2009

On today's menu: DRM

Stumbled across some stuff, making me think I'd need to design and build a DRM-receiver. First ideas evolved; the design will be using (pulled) crystals and logic ICs.

Frequencies the receiver should be receiving, standard crystal frequencies provided:
  • 3995 kHz (BBC/DW) - 4.000 MHz
  • 6130 kHz (BBC/DW) - 6.144 MHz
Other frequencies be reached by standard crystals:
  • 3965 kHz (RFI) - 3.9321 MHz
  • 5995 kHz (Radio Australia) - 6.000 MHz
  • 6015 kHz (TDPradio) - 6.000 MHz
  • 9850 kHz (Radio Prague) - 9.8304 MHz
  • 11995 kHz (RDP Int.) - 12.000 MHz
For the fun of it, frequencies reached by standard crystal frequencies divided by two:
  • 1008 kHz (Economic. Ch.) - 2.048 MHz
  • 1548 kHz (DW) - 3.0721 MHz
The plan, for now, is to build something for the first list provided in this post.