View Single Post
Old 12-08-2018, 00:43   #14
Registered User
Digger's Avatar
Join Date: Mar 2005
Location: Shizuoka City, Japan
Posts: 9,773
Originally Posted by AlexDRM
DRM Mode A, 9 kHz wide - on shortwave?!

Well, 9 kHz is a bit odd on short wave but on the other hand, even if it is not recommended, Mode A has been successful in many cases in the past. According to my records RTI has always used Mode A and the (distorted) audio was always up to 5000 Hz (but that was with 10 kHz, not 9 kHz DRM bandwidth). I have reported to Taiwan several times and always been rewarded with a QSL card in the post, but nobody seem to understand that the audio level is far too high which causes severe distortion. Otherwise I agree, the rest of the DRM configuration is a wise decision.
Digger is offline   Reply With Quote