I recently ordered a high-performance Kuhne TR 144 H +40 2m transverter for use
with my K3 in an EME station I am building at my new Glade Park CO QTH. Kuhne
recommended that I run their transverter at 14-MHz in lieu of 28-MHz due to
superior K3 rx phase noise at the lower frequency. True?
Hi Eric
Do you have any transmitter IMD numbers yet?
Craig
VK3HE
--- Eric Swartz - WA6HHQ, Elecraft
[EMAIL PROTECTED] wrote:
Hi Bill,
The reference on-channel signal for past ARRL BDR
testing has typically
been set between -110 and -80 dBm, well above the
MDS. te interfering
signal
Here are transmit composite phase noise numbers from the Lab for the K3.
Needless to say, we are pleased with the results. :-) I've also included
some numbers from the ARRL reviews for several late model rigs.
Rig 1kHz2 10 20 50 100 1M
K3 -110 -119 -136 -140 -143 -144
Eric Swartz - WA6HHQ, Elecraft wrote:
Here are transmit composite phase noise numbers from the Lab for the
K3. Needless to say, we are pleased with the results. :-) I've also
included some numbers from the ARRL reviews for several late model rigs.
Rig 1kHz2 10 20 50 100 1M
WA6HHQ:
Rig 1kHz2 10 20 50 100 1M
K3 -110 -119 -136 -140 -143 -144 -150
I'm now wondering how you measured 143 dBBDR at 2 kHz in the
presence of 119 dB Phase
Noise? Shouldn't the measurement have been
phase noise limited?
73,
Hi Bill,
The reference on-channel signal for past ARRL BDR testing has typically
been set between -110 and -80 dBm, well above the MDS. te interfering
signal generator is increased until this signal drops by a dB due to
compression. This on frequency signal dominates the in-band RMS audio
WA6HHQ:
They are now making the dynamic range
measurements by measuring the on frequency IMD spur or blocked signal
using a narrow band spectrum analyzer. This separates the blocking or
IMD measurement from reciprocal mixing, which they will do as an
additional test.
I suppose this
I wrote:
Rig 1kHz2 10 20 50 100 1M
K3 -110 -119 -136 -140 -143 -144 -150
ORION 2 -121 -129 -126 -125 -118 -128 -138
Delta-11 -10 +10 +15 +25 +26 +12
Make that +16
73, Bill
And if you look at the actual phase noise plots the actual cross over
point is right about 5 kHz.
You are absolutely right about the importance of looking at the overall
area 'under the curve' for phase noise as you move out across the band.
The sum integrated total of the mixing of the phase
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