Re: Scheduled Recordings

Robin Thompson

Re FM (Broadcast) well 15Khz is the upper audio limit (due to the 19Khz pilot tone filtering)


Due to channel spacing  (9Khz in Europe - 10Khz in US ?) 4.5/ 5Khz audio max.

But on SW where channel spacing is less , the same max audio frequency still tends to be applied, interference being minimised by not using the channel next to another strong signal !


DAB uses 48 or 24Khz sampling and so can in theory carry up to 22Khz or 11Khz


I can find out about DRM – but not too sure at present






From: sdr-radio-com@... [mailto:sdr-radio-com@...] On Behalf Of Simon HB9DRV
Sent: 10 June 2010 09:23
To: sdr-radio-com@...
Subject: RE: [sdr-radio-com] Scheduled Recordings





What's the maximum audio frequency in AM transmissions?


What's the maximum audio frequency in FM transmissions?


Simon Brown, HB9DRV


From: sdr-radio-com@... [mailto:sdr-radio-com@...] On Behalf Of David Messing
Sent: 10 June 2010 00:45
To: sdr-radio-com@...
Subject: Re: [sdr-radio-com] Scheduled Recordings





open the bandwidth for AM....


Have the Frequency Spectrum Display in sync with the audio, it is delayed about a second from what comes out the speaker.




On Wed, Jun 9, 2010 at 2:08 PM, Simon HB9DRV <simon@...> wrote:


Hi All,


For a major user of SDR radios I have added advanced scheduled recordings to the console.


What have I forgotten? What do you need - professional and / or amateur users?


Simon Brown, HB9DRV



Join to automatically receive all group messages.