Sent: Monday, March 13, 2006 7:05 AM
Subject: [Elecraft] Filter alignment question
>
> Hi,
>
> I was monitoring the K2's local oscillator frequency and I noticed that as
> I tune to WWV in the various modes, that the LO frequency is different at
> zero beat. I expected an
Mike,
Which oscillator are you referring to as "local Oscillator"? If you are
referring to the BFO, then it should be different from LSB to USB because
that is the way the sidebands are switched.
If you are referring to the VCO, then you must be retuning if that changes
between LSB and USB - if
Hi,
I was monitoring the K2's local oscillator frequency and I noticed that as I
tune to WWV in the various modes, that the LO frequency is different at zero
beat. I expected an offset (w/respect to SSB) in the CW mode but I expected
the LO to be the same at zero beat whether I was in LSB or
W3FPR - Don Wilhelm wrote:
If the tone pitch change is 20 Hz or less it is because of the quantizing
error in the K2 and nothing can be done about it. The K2 firmware works to
preserve the pitch no matter where the filters are set as long as the signal
is anywhere within the filter passband.
W
KT5D asked:
Everything seems to be fine except that as I scroll through the CW XFIL
filters, the tone of the test signal changes slightly. Is this to be
expected? Is it possible to get the tone exactly the same for every filter
setting or is a slight variation normal?
Yes, it is
If the tone pitch change is 20 Hz or less it is because of the quantizing
error in the K2 and nothing can be done about it. The K2 firmware works to
preserve the pitch no matter where the filters are set as long as the signal
is anywhere within the filter passband.
73,
Don W3FPR
> -Original
I recently acquired K2 #1084 from a friend. I upgraded the radio to Rev. B,
added the DSP module and am about half way through the KPA100. As I was
aligning the filters I noticed something unexpected. Everything seems to be
fine except that as I scroll through the CW XFIL filters, the tone of th
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