[ICOM] IC-7000 AM Modulation Problem

[Adam Farson]

Hi Mac,

Indeed; I did not mention that, as it seems so obvious. But we have been
deceived before...

The same applies to the spectrum analyser, whose front end is not happy with
anything much over 0 to +10 dBm.

Cheers for now, 73,
Adam VA7OJ/AB4OJ
 

-----Original Message-----
From: icom-bounces at mailman.qth.net [mailto:icom-bounces at mailman.qth.net] On
Behalf Of D C *Mac* Macdonald
Sent: 07 April 2006 10:42
To: icom at mailman.qth.net
Subject: RE: [ICOM] IC-7000 AM Modulation Problem

Assuming the person who uses such a receiver for this task has its input
hooked to a 50 Ohm dummy load and  NOT  to the 7000's output!!!

(;-p)

Mac - K2GKK/5



----Original Message Follows----
From: Adam Farson <farson at shaw.ca>
Reply-To: ICOM Reflector <icom at mailman.qth.net>
To: 'ICOM Reflector' <icom at mailman.qth.net>
Subject: RE: [ICOM] IC-7000 AM Modulation Problem
Date: Fri, 07 Apr 2006 10:39:25 -0700

Hi Larry,

I would suggest checking the carrier/sideband amplitude relationship at 25W
carrier output with a spectrum analyser with 300 or 100 Hz RBW. An
IC-756Pro-series radio, IC-7800 or IC-781 will do as an alternative
measuring instrument.

If the peak sideband amplitude is 6 dB below the carrier on voice peaks, the
radio is generating a properly-modulated AM signal.

Cheers for now, 73,
Adam VA7OJ/AB4OJ


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