This happens with no background noise and no modulation...just pressing the PTT switch on the mic and taking a look at the bandscope.
73 John K7FD
------- Original Message --------
From: "Graf Ulrich ICM
MP PD ST 1 ULM 2" <[EMAIL PROTECTED]>
To: "'John_K7FD'"
<[EMAIL PROTECTED]>, "Drakelist Mail (E-mail)"
<[EMAIL PROTECTED]>
CC:
Subject: RE: [drakelist] T-4XB AM
question
Date: 04/11/03
The relationship of frequencies indicates
a carrier modulated with a signal of about 18 ... 20 kHz. The amplitude
relationship with sidebands half as strong as the carrier means 100%
modulation. Really no modulation? Or just no speech but a lot of background
noise and wide open mic gain?
Uli, DK4SX
-----Original
Message-----
From:
[EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED]
Behalf Of John_K7FD
Sent: Dienstag, 4. November 2003 05:57
To:
[EMAIL PROTECTED]
Subject: [drakelist] T-4XB AM
question
Hello,
When I keyed my T-4XB (no modulation)
on AM at 3.871 MHz, I took a 'look' at
the signal on my IC-756ProII band
scope. What I saw has me a bit concerned:
I see my signal has two smaller
carriers on each side -- one at 3.851 MHz
and one at 3.889 MHz. It
appears the relative amplitude of the side signals
are about half the
strength of the carrier on the intended
transmit
frequency...
...has anyone come across this
before?
Thanks,
John
K7FD
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