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

[Clemens Paul]

Interesting addendum about the ADC.
Contrary to the brochure all EM510 of the series production use a 24bit ADC.

73
Clemens
DL4RAJ
----- Original Message ----- 
From: Clemens Paul 
To: premium-rx at mailman.qth.net 
Sent: Sunday, February 18, 2007 8:32 PM
Subject: Re: [Premium-Rx] The new R&S EM510 Direct-Sampling HF Receiver


>... the phase noise is that of a single
>crystal oscillator at circa 100 MHz.  (Or the ADC's inherent process noise,
>which I imagine is a bit worse.)
>-- john, KE5FX

According to the R&S engineers the phase noise comes mainly from the ADC clock
while the aperture jitter of the ADC adds only little phase noise.

R&S uses an ADC from Analog Devices with a sampling rate of around 80MHz.

Maybe it might be custom designed because there have been meetings between top engineers 
>from R&S and Analog Devices during the development.
But that's speculation.

Clemens

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