Chris,
Let me be specific and succinct.
There are only 2 conditions that would cause that behavior.
1 - The KX1 is set to receive upper sideband on 40 meters.
2 - the firmware is sending incorrect data to the DDS.
Re-read my last email.
I do not question the accuracy of the service monitor, but I do question
whether the KX1 is set for USB on 40 meters. If the KX1 is indeed set
for NOR (CW) mode, then there is a fault with the firmware.
73,
Don W3FPR
On 12/18/2012 10:44 PM, Chris Johnson wrote:
Hi Don,
I am using my elmer's very expensive service monitor to watch the frequency
that the KX1 is generating. I set the VFO to a given frequency, type that
same frequency into the service monitor, then start a solid tune on the KX1.
There is a BNC cable connected between both devices. The service monitor then
shows on its spectrum display the exact frequency the KX1 is generating and
also shows how many Hz it is deviating from the frequency entered. Are you
saying that BFO / DDS settings are only dealing with the RX portion of the KX1?
I understand you thinking this because the offset is ~ 600hz, the standard
offset for CW. This is not the case, and only happens on 40m. TX deviation
on 80m, 30m, and 20m is only off by a few hz.
If this is controlled by the firmware, how can this be calibrated? I picked
up a second KX1 off eBay this week for an emergency radio and will also check
its alignment.
Thx
Chris
K6OZY
On Dec 18, 2012, at 1:26 PM, Don Wilhelm <[email protected]> wrote:
Chris,
There is one thing that might produce the condition you state, and that is if you have 40 meters
set for USB. Tap the band button and see if there is a "u" in the left of the display
when the "7" digit is displayed.
The KX1 firmware controls both the transmit and receive frequencies. The
receive frequency is offset by whatever you set into the sidetone pitch, and
the frequency indicated on the dial should be the transmit frequency.
So, if the transmit frequency is indeed off, it must be due to the firmware.
That has nothing to do with the BFO and DDS settings on the KX1.
Are you certain the receiver you are using to listen to the KX1 is in CW mode?
If it is in SSB mode, its dial indication may be shifted by the amount that
receiver has set in its sidetone pitch parameter. I know Yaesu changes the
displayed frequency when going from SSB to CW, and they shift the transmit
frequency when in CW mode. Elecraft does it differently and always displays
the transmit frequency, but shifts the frequency for receive.
73,
Don W3FPR
On 12/18/2012 2:39 PM, Chris Johnson wrote:
I guess using the word "Dial" may be misleading. I am simply trying to say
that on 40m the frequency that is being transmitted on is 685 hz higher than what is on
the display. This is only on 40m. The other 3 bands are pretty accurate. The BFO and
DDS menu options are set to 0.
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