SdrDx Documentation -- Digital Radio Mondial (page 29)

Beta Address: http://blish.org/sdrdxdoc/tuning6.html

5.15.10 - SW DRM - Digital Radio Mondial

DRM reception
USB, 10 kHz BW

SdrDx is an ideal platform for receiving DRM broadcasts and feeding them to a DRM demodulation application. You should have "SoundFlower" installed if you are running on the Mac, and you'll need a copy of "DREAM" or some similar DRM demodulation application. Similar conditions obtain for DRM under Windows, but I have no specifics at this time.

Dream for OS X receiving REE on 9625 KHz

Here's a link to a pre-compiled Mac version of DREAM which is well worth grabbing. The reason you'd want to get this ASAP is that compiling the open-source code to create this application is really quite a challenge, and technically speaking (at least according to the notes in the project about restricted CODECs, etc.) this download should not be available at all, and so may disappear at any time:

http://mac.softpedia.com/get/Audio/Dream-DRM-Receiver.shtml

...and here's a link to soundflower (Mac audio re-routing app):

http://code.google.com/p/soundflower/downloads/list

So to receive DRM with SdrDx, there are things you need to do:

------------------------------ One Time -----------------

install soundflower
install dream

------------------------------ Every Time ---------------

Select USB as your demodulator mode
Tune to the broadcast frequency (DRM looks like a 10 KHz wide "square" signal)
Pull the left side of the demod bandwidth to 100 Hz
Stretch the right side of the demod bandwidth to 10 KHz
Turn OFF -Ri
Turn OFF LPF
Turn OFF HPF
Turn OFF NBL
Turn OFF NOT
Turn OFF LSQ
Turn OFF DNR
Turn OFF SSP
Turn OFF TDM
Turn OFF 50
Turn OFF 60
Open the Sound dialog, select "Soundflow 2ch" as SdrDx output sound
Open the DREAM app and select "Soundflower 2ch" as DREAM input sound

...and that should do it.

toc index guide changes keyboard , previous . next