Amps
[Top] [All Lists]

[Amps] IMD vs. Vcc

To: <amps@contesting.com>
Subject: [Amps] IMD vs. Vcc
From: 2@mail.vcnet.com (Richard)
Date: Wed, 3 Apr 2002 06:32:41 -0800
>Marv,
>
>Thanks much for pointing out where the "real" information is ... although
>"A3J" is nowhere to be found ... here is the text for SSB (supressed
>carrier) transmission:
>
>>"Telephony, single-sideband suppressed  B<INF>n</INF>=M-lowest modulation
>frequency        M=3000, lowest >modulation frequency is 3000 Hz,   2K70J3E
>> carrier.
>2700 Hz Bandwidth: 2700Hz=2.7 kHz
>
>
>>[[Page 547]]"
>
>I wonder if anyone has pointed out the typo where it states "lowest
>modulation frequency is 3000 Hz," ?
>Lowest modulation frequency should read 300 HZ .... M=3000 - 300Hz = 27
>khz.
>
>Lets don't tell the HIFI audio guys that they cannot transmit anything below
>300 HZ or any wider signal than 2.7 Khz.
>
>I am still trying to figure out Tom's statement: "(A3J means 3kHz wide)"
>.... there is no "J" symbol for the 3rd identifier.
>
>Where they DO spec 3 khz of bandwidth for SSB FULL CARRIER it reads:
>
>>"Telephony, single-sideband, full       B<INF>n</INF>=2M
>M=3000, Bandwidth: 3000 Hz=3 >kHz                  3K00H3E
> >carrier."
>
?  Without a db spec, a bandwidth spec is indeterminate.  


-  R. L. Measures, a.k.a. Rich..., 805.386.3734,AG6K, 
www.vcnet.com/measures.  
end


<Prev in Thread] Current Thread [Next in Thread>