It looks like your RBW is way too high, which will increase the apparent
noise level by a large amount. It should be set to 100 Hz also. Set your
sweep to auto so it will go slowly enough to make the measurement. It
will take some time for the sweep.
73, Eric
S55M wrote:
Hy Eric!
Thanks for Your answer.
The measurment setup is :
VBW 100Hz
RBW 10kHz
Span 500KHz
Any ideas what went wrong????
Adi
----- Original Message -----
From: "Eric Swartz - WA6HHQ, Elecraft" <[EMAIL PROTECTED]>
To: "S55M" <[EMAIL PROTECTED]>
Cc: "Elecraft" <[email protected]>
Sent: Thursday, March 10, 2005 6:53 PM
Subject: Re: [Elecraft] K2 with 144Mhz transverter
Hi Adi,
There must be something wrong with your K2 or measurement set up. As can
be seen
from the phase noise plot on our web page (under radio comparisons) the K2
TX
signal is better than -130 dBc when you get 10-20 kHz away from the
carrier.
Also, what b/w and span were you using on your 8590 analyzer?
On the receive side the XV and K2 pair are among the best out there. I do
not
know what was different about his set up.
73, Eric
S55M wrote:
OK...now I'm getting really angry HI HI :))...
First the transmitter (easy one)
I made a measurment with my HP8590A of the transmitted signal from K2 to
transwerter (signal after the first buffer).
When i moove 100 KHz away from carier there is -73dBc of signal
remaining.
After a little bit of conversation with local gurus probably this not to
good number (compared dBc's of other same 1.st class rtx's are -90
to -100dBc)
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