Just checked my K3S and P3 using WWV 5.0 MHz and 15.0MHz. The error
indicated on the radio is 1 to 2 Hz low. The P3 is correct for both
frequencies with a Ref Cal value of -55 for both frequencies.
My K3S calibration method uses CW mode, with CWT active and press SPOT.
That will zero the radio to the WWV carrier frequency and account for
the user selected sidetone frequency. It will indicate such on VFO A
showing any + or - difference. 14.999.999 a 1 Hz error and 4.999.998 a
2 Hz error. The P2 shows the exact frequency with MKR A on both WWV
frequencies.
All good enough for me.
73
Bob, K4TAX
On 7/23/2019 2:55 PM, Kevin, N4TT wrote:
Thanks all!
There's a ref cal on the K3s. I ran through the procedure for that using 15
MHz and rechecked on 10 MHz. Seems this was quite a bit off. Now, not only
is it lining up on WWV but also any CW signal I select lines up very
closely between the marker on the P3 and a 600 Hz marker on fldigi with the
sidetone set to 600.
A thing I noticed. When making the adjustment on the P3 the offset would be
different for different signals. 15 MHz was 263 while 10 MHz was 210. So
there was no one-size-fits-all adjustment there. On the K3s, I adjusted for
15 and everything came into sync including the P3, which now reads 12 for
the ref adjustment and is consistent across a number of signals.
Learning more every day. And liking it more.
73,
Kev N4TT
On Tue, Jul 23, 2019 at 2:38 PM Joe Subich, W4TV <li...@subich.com> wrote:
On 2019-07-23 12:47 PM, Alan Bloom wrote:
> Also be aware that the center frequency differs depending on mode.
The P3 *should be able to account for that* by using the FI get:
FI * (I.F. Center Frequency; GET only)
RSP format: Finnnn; where nnnn represents the last 4 digits of the
K3’s present I.F. center frequency in Hz. Example: If nnnn = 5000,
the I.F. center frequency is 8215000 Hz. Intended for use with
panadapters, which need to keep track of the exact I.F. center
frequency as filter bandwidths and shifts are changed by the
operator.
73,
... Joe, W4TV
On 2019-07-23 12:47 PM, Alan Bloom wrote:
Good advice.
Also be aware that the center frequency differs depending on mode. For
example, it is the supressed carrier frequency on SSB but is offset by
typically 600 Hz on CW.
I like to use AM mode for frequeny calibration. After doing a frequency
calibration on the K3, tune to a signal on the AM broadcast band and
adjust the P3 frequency calibration. (MENU:RefCal. Cal procedurre is
on page 39 of the manual) As I recall, AM broadcast stations are
required to be within 20 Hz of nominal frequency but are typically much
closer than that.
Alan N1AL
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