[Elecraft] Transceiver Test Bed at W3LPL

[donovanf at starpower.net]

Hi Igor, 


Very good ideas! 


Thanks 


73 
Frank 
W3LPL 

----- Original Message -----

From: "Igor Sokolov" <ua9cdc at gmail.com> 
To: elecraft at mailman.qth.net 
Sent: Friday, April 3, 2020 2:53:55 PM 
Subject: Re: [Elecraft] Transceiver Test Bed at W3LPL 

Frank, you can add different headphones on Radio#4 to the mix :) 

Also on SSB try recordings of BY stations to make it more difficult. 

73, Igor UA9CDC 

31.03.2020 22:44, donovanf at starpower.net пишет: 
> 
> 
> During the Coronavirus crisis many of us have much more time than 
> usual for serious technical experimentation and testing. 
> 
> I'm building a transceiver test bed and I'll regularly report the progress 
> of my test setup, procedures and results. The intent of my test bed 
> is to document the transmitter and receiver performance of modern 
> transceivers in the intense QRM environment encountered by contesters. 
> My test bed will not be used to duplicate technical tests such as sensitivity 
> and dynamic range that are well documented by other expert testers. 
> 
> I welcome constructive comments about my test bed, test procedures and 
> results. 
> 
> Hopefully other technically inclined hams will develop similar test beds 
> so we can compare our test procedures and results. I will share my initial 
> test results prior to availability of the Elecraft K4. 
> 
> Test Description: 
> 
> Transceivers #1 and #2 will be QRM generators using two K3 transceivers 
> with DVRs and stored Morse messages feeding Array Solutions Powermaster 
> digital wattmeters and individual dummy loads. The QRM generator 
> transceivers will use various frequencies very close to the frequency of 
> transceiver #3. The DVRs and CW message memories in the QRM 
> generator transceivers will store various voice and Morse messages 
> which will change as the test procedures evolve. The power levels and 
> frequencies of the QRM generator transceivers will be varied in accordance 
> with written test procedures. 
> 
> Transceivers #3 and #4 will be the transceivers under test. 
> 
> Transceiver #3 will be the transmitter-under-test feeding an Array Solutions 
> Powermaster digital wattmeter and dummy load. Initially they will be 
> my K3 and FTdx5000 transceivers and my Heil and ModMic microphones. 
> Transmitter #3 will generate call signs and contest exchanges to be transcribed 
> by operators listening to transceiver #4. The frequencies, power level, 
> callsigns, contest exchanges, microphones and operator controllable settings 
> (e.g., compression and equalization) used by transceiver #3 will be varied in 
> accordance with written test procedures. 
> 
> Transceiver #4 will be the receiver-under-test connected to a dummy load. 
> Initially they will be my K3 and FTdx5000 transceivers. The callsigns 
> and contest exchanges transmitted by transceiver #3 will not be known to 
> the operator transcribing the audio heard from transceiver #4. A variety of 
> operators will be invited to transcribe the callsigns and contest exchanges 
> they hear on this transceiver. 
> 
> 73 
> Frank 
> W3LPL 
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