针对2009年IV3NWV评测的回应
There is a document that was created in 2009 by the owner of Microtelecom SRL (the manufacturer of the Perseus receiver) titled “Perseus v. QS1R.pdf”. The document was created in response to the perceived threat of the QS1R to sales of the more expensive and inferior performing Perseus receiver. The author focused on one specification item where the Perseus was approximately 15 dB more sensitive than the QS1R to "prove" that the Perseus was superior to the QS1R Receiver. This document is extremely misleading and borders on being dishonest. Although its conclusions have been refuted and proven incorrect, I still receive questions about this document from perspective QS1R owners and therefor I will address the issues with this document here.
The testing was performed on an early QS1R unit without enclosure borrowed from a QS1R owner who had admittedly damaged the unit. Evidence that the unit was in fact damaged is the report of the MDS of the QS1R being degraded severely when the Dither function was turned on. This is an indication that the input network components of the QS1R was damaged. Under normal operation the QS1R sensitivity degrades by approximately 1 dB when the Dither function is used.
I have asked for the testing and results in the PDF document to be re-performed and reported with a undamaged QS1R, but to date ( Nov. 2011) these tests and report have not been updated. I will leave it to the reader to decide why this is so.
The document incorrectly states that the QS1R is not CE and FCC certified.
The document incorrectly states that the QS1R does not have wide band record and playback.
The document incorrectly states that the QS1R SSB and CW MDS is -104/-111 dBm.
The document incorrectly states that the QS1R Sensitivity is 4.2 uV.
The document incorrectly calculates the BDR figures for the QS1R based on the above incorrect test data.
The author's claim that the Perseus is approximately 15 dB more sensitive than the QS1R is correct, however this excess sensitivity goes to waste over more than half of the Perseus's operating range and decreases the ADC clipping level by the same 15 dB. Please see the discussion below:
