[Kenwood] SM-220 question???

2003年1月15日 06:57:32 -0600 (CST)

Excellent point Jerry! The catch-22 of monitoring modulation on the receive side! If 
we broadened out the filtering to catch the splatter we end up gathering all the other 
nearby RF as well. Thus making our observation somewhat useless also. Especially 
true on our crowded ham bands. So I agree with your view "looks great", but not as 
useful as monitoring modulation on the transmit end where it's suppose to be checked.
Opening it up to 6KC and monitoring CW signals from old TNT or MOPA style 
transmitters, like those used in the AWA 1929 contest, is pretty cool though.
Thanks for the insight Jerry es 73
Don N9OO
On 2003年1月14日 21:45:48 -0600, Dr. Gerald N. Johnson, electrical engineer wrote:
>The trouble with putting the scope after one or more filters is that the
>filter will clean up a bad signal and make it look good. It will have
>left off the splatter and so will hide the clipping that caused that
>splatter. Looks great but isn't useful information.
>>73, Jerry, K0CQ
>-- 
>Entire content copyright Dr. Gerald N. Johnson, electrical engineer.
>Reproduction by permission only.