[Elecraft] K2 with 144Mhz transverter

[Eric Swartz WA6HHQ - Elecraft]

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" <eric at elecraft.com>
> To: "S55M" <s55m at siol.com>
> Cc: "Elecraft" <elecraft at mailman.qth.net>
> 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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