[GreenKeys] Military TUs

[Roy Morgan]

Robert, and other Greenkeyers,

Thanks for the clarification. I realize that there is a distinction between 
slope detection and discriminator, but was not very clear about it.

I look forward to getting my CV-115 running one day.

Roy


At 03:14 PM 3/7/2007, Robert Downs wrote:
>Roy,
>
>They are not slope-detecting systems.  Slope detection is a quick and 
>dirty way to get audio from an FM signal with an AM receiver.  The 
>detector in the CV-116, CV-57, 59, 89 and etc are all FM 
>discriminators.  The characteristic of a discriminator is that it provides 
>bipolar output linearlly and symetrically about a center frequency out to 
>some +/- percentage of the center frequency (the range or bandwidth).  The 
>output of a slope detector (another and much earlier  and no longer 
>commonly used form of FM detector) is unipolar.
>
>In a message dated 3/7/2007 1:51:34 PM Central Standard Time, 
>roy.morgan at nist.gov writes:
>>They operate on the IF output from two receivers, and are slope-detecting
>>systems. That is, they have a discriminator circuit that puts out a voltage
>>that varies with frequency. Here is a message from my notes file on them:



- Roy Morgan, K1LKY since 1959 - Keep 'em Glowing
13033 Downey Mill Road, Lovettsville, VA 20180
Phone 540-822-5911   Cell 301-928-7794
Work: Voice: 301-975-3254,  Fax: 301-975-6097
roy.morgan at nist.gov --