[Icom] Re: OT Discriminator out

[Brian Short]

You will probably get better answers, but in a nutshell, tapping the
output directly from the discriminator eliminates any "filtering" which
may take place in the audio output amplifiers.  Both low and high
audio frequency response can be important, depending on the application.

Personally, I modified my Yaesu FT-736 back in '90 or so for 9600 baud
packet operation with satellites.  The mod involved possibly replacing
the IF ceramic filter, adding a direct screened connection to the 
varactor
as well as the discriminator, allowing both transmit and receive 
capability.
Another suggestion was to break off a capacitor at the discriminator to
enhance the low frequency response.

Anyway, most VHF radios made today have a 9600 data connection.

Scanning enthusiasts decode various control data like the data channel
of a trunked radio system.  These decoders need better than 
communications
voice quality audio response to operate effectively.

Brian

On Wednesday, August 6, 2003, at 06:32 PM, Larry - WA2DGD wrote:
>   Hello,
>
> I know this is OT but I also know this is where I will get an answer. 
> Sorry
> if this message appears more than once but I sent it about 5 hrs ago 
> and
> again 3 hrs ago, hopefully it makes it this time.
>
> I saw a scanner that has a "discriminator output" that puts out a 
> baseband
> signal useful for decoding digital and sub audible signals with a 
> computer.
>
> How is this different or "better" than using the audio output?
>
>
> 73
> Larry
> WA2DGD
> K2 #1672
> ARCI QRP #11215
> NJ-QRP# 395
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