A loop thru for an external linear amplifier would be nice too (this
can be a major source of TX distortion). Seems like you could
unmute the receiver by an appropriate amount and then downconvert
the signal through the RX chain to a point where the DSP could
generate the oscilloscope display. The DSP could generate all
kinds of different TX test patterns (single tone, two-tone, three tone,
or even flat white noise (you would switch the display to spectrum
analyzer mode for this pattern and look for spectral regrowth in
"bartshead").
Good idea, Al!
73 de Mike, W4EF..............................
P.S. You could even do a CW test pattern and look for key clicks.
----- Original Message -----
From: <al_lorona@agilent.com>
To: <eric@k3na.org>; <tentec@contesting.com>
Sent: Wednesday, December 24, 2003 11:03 AM
Subject: RE: [TenTec] two-tone transmitter signals (was "New Idea")
>
> >
> > Another solution would be to have a .wav file on one's
> > computer with the two tones recorded on it.
>
>
> That's a good idea. However, I am more interested in incorporating the
> tone generators and oscilloscope in the transceiver itself. In the
> industry, this is called Built-In Test Equipment, or BITE for short.
>
> A couple of folks pointed out that the tones wouldn't match the
> microphone's audio, but I'm not sure why couldn't the tones be injected
> right at the mic input?
>
> It is an extension of what Elecraft does in the K2. There is both a
> voltmeter and a frequency counter built in and usable at any time they
> are needed. So why not more of this kind of thing?
>
> Also, I'm curious: do any of the rigs with spectrum displays have an
> external input for the spectrum analyzer?
>
> Al W6LX
>
>
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