[Premium-Rx] The new R&S EM510 Direct-Sampling HF Receiver

[sig346 at netscape.net]

-----Original Message-----
From: sig346 at netscape.net
To: premium-rx at mailman.qth.net
Sent: Thu, 15 Feb 2007 10:32 PM
Subject: Re: [Premium-Rx] The new R&S EM510 Direct-Sampling HF Receiver





 -----Original Message-----
 From: sig346 at netscape.net
 To: farson at shaw.ca; Premium-Rx at mailman.qth.net
 Sent: Thu, 15 Feb 2007 10:01 PM
 Subject: Re: [Premium-Rx] The new R&S EM510 Direct-Sampling HF Receiver

    The RS Datasheet reveals potentially weakness of all Direct Sampling 
HF Receivers: their limited
  dynamic range. To hide this RS tries stretching both German and 
English languages . As a result,
  a new wording has been invented: LOW DISTORTION MODE. In this mode, 
which actually is nothing
  more than an attenuator at the input, the receiver has IP3 of 30dBm, 
BUT NOISE FIGURE OF 26dB!.

  I will send email to Rhode und Schwarz suggesting one more mode: 
ULTRALOW DISTORTION,
  to obtain 50 dBm of IP3, but that would require 30dB attenuation, 
bringing noise froor to
  45 dB. It would be, nevertheless, sufficient to listening to Deutsche 
Welle in the World Bavarian Capital of Munich.

  Rockwell Collins describing their similar direct sampling receiver 
CX7800 simply "forgets" include some data
  regarding dynamic range. That makes their life simpler: no need to 
hide an army of technical linguists.....

  On a serious note, I tried CX7800. It is a respectable receiver, but 
far from being "Premium", not much
  better than SDR14. So, you, gentlemen - owner of WJ, TCI, CUBIC, 
Telefunken, etc - remain cool -
 your receivers are still "Premium" without stretching imagination.

 Regards,
 AW



 -----Original Message-----
 From: farson at shaw.ca
 To: Premium-Rx at mailman.qth.net
 Sent: Thu, 15 Feb 2007 2:31 AM
 Subject: [Premium-Rx] The new R&S EM510 Direct-Sampling HF Receiver

  Rohde & Schwarz have announced their new EM510 direct-sampling HF


intercept/surveillance receiver:





http://tinyurl.com/2lan7h  (EM510 brochure in PDF format, in German)





Cheers for now, 73,


Adam VA7OJ/AB4OJ













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