Subj : Re: Ham Radio Digital Mod
To   : Ed Vance
From : Holger Granholm
Date : Fri Nov 17 2017 09:43 am

In a message on Friday 11-16-17 Ed Vance said to Holger Granholm:

GE Ed,

EV> No need to apologize for making a comment, these BBS Echos are the
EV> same as a Amateur Radio ROUNDTABLE on 80 Meter AM. afaik (as far as
EV> I know)

Yeah I know.

 HG> Those old Digibox channels are now called analog and are still
 HG> available on modern TV sets, along with true digital and HD channels.

EV> If the Digibox signal are Digital, calling them Analog would sound
EV> strange to me.

It DOES to me too!!

 HG> In most cases when the digital/HD signal becomes too weak to give a
 HG> picture, the sound also disappears. In rare cases there may be sound.

I'm not usually looking at the "analog" channels because the aspect
ratio is not correct, so I don't know how the sound behaves with weak
signal.

EV> This new fangled stuff we just have to get adjusted to, don't we?

Yes I have.

 HG> There's no special test equipment needed, except a signal generator
 HG> that can give a digital TV signal, ....

EV> I didn't know He only needed to get a Digital TV SigGen to work on
EV> the newer gear.

No one expects you to know it, but your friend should have known.

EV> was inside of a TV Set, except for taking some 7 Pin and 9 Pin Tubes
EV> out and taking them somewhere there was a Tube Tester.

Tube testers were out long before production of tube TV's ceased.

A TV-service shop usually had a stock of new tubes, so it was easier to
plug in a new one into the socket of a suspect one.

A mobile service enginer also had a stock of new tubes in his tool box.

EV> The TV Sets I have now only have One Tube in them, the Picture Tube.

I don't have any TV sets with tube's. The monitor I'm using for the BBS
is the only one with a picture tube.

 EV> Have You noticed if there any lapses or delays to the transmission
 EV> that You are listening to when You're using any of those Digital
 EV> Modes wheather during a QSO or You're SWL'ing the Band?

I am not using any digital modes except A1A (CW) on ham radio!

 HG> What I have noticed is that the more compressed a TV-signal is, the
 HG> more is the time delayed. Finnish TV hasn't noticed that or corrected
 HG> it, but swedish TV has.


73 de Sam, OH0NC

aka Holger


... It's the best I can do on short notice.
-- MR/2 2.30


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