I think there’s a problem with the instructions. I could not hear a signal
when the VFO was set 16 KHz above the KX3 frequency with RIT off as you say.
But you will hear it with RIT turned on.
Grant NQ5T
> On Jul 19, 2020, at 5:02 PM, Mike Parkes wrote:
>
> I am trying to perform only page 5 of the RX sideband null procedure, and
> and have a question. (My KX3 is a later serial number 9852 and according to
> the RX sideband null A8.doc, most of this nulling procedure was performed
> when the KXFL3 was installed by Elecraft, the only part not done(?) is the
> 2nd part of the RX SHFT=8.0 I.F. Image (16 kHz) Nulling procedure which is
> on page 5 of the PDF document.)
>
> So, I am trying to work through this (using an XG3 with its freqs set per
> the instructions to 1810, 3510, 5310, 7010, 10110, 14010, 18110, 21010,
> 24910, 28010, 50010) and I am at Page 5, Step 7:
>
> 7. Optimize RX SHFT=8.0 I.F. image gain and phase settings as follows: a.
> Set both the signal source and KX3 to the target band (starting with 160
> m). Recall that *the VFO should be set 16 kHz higher than the signal source*.
> Make sure you’re in CW mode. (Note: You can change bands and modes from
> within the RXSBNUL menu entry.) *You should hear a strong signal,* and see
> an S-meter reading of between S9 and S9+30 dB. If not, adjust the preamp
> setting or the RF source level.
>
> What strong signal? With the KX3 iin CW mode, set to 16 KHz higher than the
> signal generator frequency, there is no signal at all heard! If I tune down
> on 160 meters to the XG3 freq at 1.810 KHz then it is very strong S9. What
> am I doing wrong here?
> Thanks for any help!
>
> Mike AB7RU
> __
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