[RTTY] Use of Oscilloscope In RTTY

[Jack West XP]

I agree with Bill.

After you are used to a real oscilloscope X/Y response, the digital
displays via software seem rubbery and slower to respond no matter
how fast of computer you have.

About ten years ago I bought three Computer Patch CP-1 units
for use with the Commodore C-64, all for the sum of $35.00 at a ham fair.

I  use one of them do drive the display of my SM-220 monitor
scope in RTTY mode.  The CP-1 requires power (18 volts AC),
anudio in from the transciever, and the X/Y outputs go to the oscilloscope.

I also have the software X/Y displays going but I really prefer the
snappy oscilloscope.

73
de Jack / W7LD / "Lucky Dog"

----- Original Message ----- 
From: "Bill Turner" <dezrat at copper.net>
To: "John MacFarlane" <John.MacFarlane at metrovancouver.org>
Cc: <rtty at contesting.com>
Sent: Thursday, November 29, 2007 10:42 AM
Subject: Re: [RTTY] Use of Oscilloscope In RTTY


> ORIGINAL MESSAGE:
> 
> On Thu, 29 Nov 2007 09:20:49 -0800, "John MacFarlane"
> <John.MacFarlane at metrovancouver.org> wrote:
> 
>>
>>Is a piece of hardware 'better' for tuning-in a signal than doing it by
>>eye on the computer screen - or relying on a software scope?
>>
>> 
>>
>>How is the oscilloscope actually connected to the system to monitor the
>>signal - is it a 'hard' connections? I'm a relatively new ham so please
>>don't take knowledge for granted in response - many thanks 73
> 
> ------------ REPLY FOLLOWS ------------
> 
> Oscilloscopes have one advantage that I know of: They respond to
> tuning changes instantly, whereas software-based tuning methods have a
> "lag" or "rubbery" feel to them. This is not a major disadvantage and
> one can easily get used to it. I used an oscilloscope for years but to
> save space I have given it up in favor of the crossed ellipses of
> MMTTY and the spectrum display of RiTTY by K6STI.
> 
> To use an oscilloscope, you need a device or circuit which separates
> out the two tones from your receiver and feeds one to the X input and
> the other to the Y input of your scope. Some TNCs such as the KAM have
> this available (with a minor modification). The KAM is what I used.
> 
> 73, Bill W6WRT
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