[Test-Equipment] Re: Test-Equipment Digest, Vol 48, Issue 14

[wolfbob]

Gee, I wish I was as smart as you so I could write in such a 
learned manner. So clear so concise. What does knowing about 
some nearly-always-been-there statement in Part 97 have to 
do with operating FM say in the broadcast band or in my baby 
monitor or on 2 meters? Now for some REAL facts:

>From the FCC Rules and Regulations:

#97.307(f) 1. No angle-modulated emission may have a 
modulation index greater than 1 at the highest modulating 
frequency.

There is no mention of "NBFM" or it's unraveling 
"Narrow-Band Frequency Modulation" in part 97. In fact the 
acronym "FM" is not used either. Us real technical folk do 
recognize that NBFM is commonly thought of as FM with a 
modulation index less than unity but the FCC is far more 
exacting in it's language.

What on earth does any of this have to do with the US Army 
abandoning FM in the 10 meter band? Why should I be aware 
that these obsolete military radios operated with FM if I 
want to use my modern all-mode HF radio in FM mode on some 
band?

And finally, what has any of this have to do with test 
equipment? The original post was about a deviation meter, 
the next was a question about what is deviation, and then 
the slurs started flying.

I'm sure you can see my confusion.

WBob, WB6JPI

----- Original Message ----- 
From: <WA5CAB at cs.com>
To: <wolfbob at csnsys.com>; <test-equipment at mailman.qth.net>
Sent: Tuesday, April 22, 2008 9:41 PM
Subject: Re: [Test-Equipment] Re: Test-Equipment Digest, Vol 
48, Issue 14


> BBBBob,
>
> No one with an IQ in the human range and a reasonably good 
> technical
> education should have any trouble understanding that 
> paragraph.  Including the
> tongue-in-cheek beginning.  The regulations referred to 
> are obviously the FCC
> regulations governing the Amateur Service.  If you haven't 
> bothered to read them
> since the late 50's when this part was last changed, you 
> cannot operate anything
> but NBFM below 29.0 MHz.  I will give you the long benefit 
> of the doubt and
> assume that you know what NBFM, 29.0 and MHz mean.  You 
> obviously never heard of
> modulation index which is specifically written into the 
> regs.  Even though it
> has been adequately explained at least three times today.
>
> In a message dated 4/22/2008 10:02:38 PM Central Daylight 
> Time,
> wolfbob at csnsys.com writes:
>> What on earth are you babbling about? Try to show your
>> ignorance more clearly.
>>
>> WBob, WB6JPI
>>
>> ----- Original Message ----- 
>> From: <WA5CAB at cs.com>
>> To: <test-equipment at mailman.qth.net>
>> Sent: Tuesday, April 22, 2008 7:29 PM
>> Subject: Re: [Test-Equipment] Re: Test-Equipment Digest, 
>> Vol
>> 48, Issue 14
>>
>>
>> >Yahbut, it is the only significant FM parameter actually
>> >written into the
>> >regulations.  It determines the only functional
>> >differences between what you can
>> >legally operate below 29.0 MHz and what you can legally
>> >operate above.  It is
>> >in fact the regulation that forced the US Military to 
>> >give
>> >up the Armor band
>> >between 20.0 and 27.9 MC.  It's why there was no
>> >replacement for AN/PRC-8 or
>> >RT-66/GRC.  Etc. etc.  So if you are going to operate 
>> >FM,
>> >you should be familiar
>> >with it.
>
> Robert Downs - Houston
> <http://www.wa5cab.com> (Web Store)
> MVPA 9480
> <wa5cab at cs.com> (Primary email)
> <wa5cab at comcast.net> (Backup email)
>
> ______________________________________________________________
> Test-Equipment mailing list
> Home: 
> http://mailman.qth.net/mailman/listinfo/test-equipment
> Help: http://mailman.qth.net/mmfaq.html
> Post: mailto:Test-Equipment at mailman.qth.net
>
>