On Oct 3, 2:22 am, SFTV_troy wrote:
On Oct 3, 3:49 am, RHF wrote:



Use a common 'portable' AM & FM Shortwave Radio
and Tune to a DRM Shortwave Radio Broadcast.http://www.drm.org/livebroadcast/livebroadcast.php
Hear that Noise on both sides of the Tuned Frequency
extending for +/- 10 kHz. That is the Digital Noise
caused by the DRM Digital Broadcast Mode.
This is "Why" many say DRM is QRM. ~ RHF


- What's QRM? (checks wikipedia)
- Does that mean "Man-made interference"

SFTV -aka- "Hybrid Digital" Man,

DOH ! - The "Q" Codes
http://en.wikipedia.org/wiki/Q_code
Amateur Radio Speak
http://en.wikipedia.org/wiki/Amateur_radio
The Amateur Radio Q-Code
http://www.qsl.net/w5www/qcode.html
Amateur {Ham} Radio Think
http://www.ac6v.com/opaids.htm

- Wikipedia doesn't say what the negatives for DRM are.

What Happens -IF- a Digital AM Signal and an
Analogue AM Signal are in the Same Channel ?
http://www.drm.org/newsevents/faqs/faq-023.php
-Or- Adjacent Channel within +/- kHz ? ? ?
-Answer- The impact on the Analog AM Signal
of a Digital Signal in the Same Channel would be
a Severe Increase in the Background Noise Level;
that often obliterates the Analog AM Signal.
http://www.drm.org/newsevents/faqs/faq-061.php

Read about Digital Radio Mondiale (DRM)
Shortwave Radio Reception in New Zealand
http://www.owdjim.gen.nz/chris/radio/DRM/

and now you know for now . . . ~ RHF