[Premium-Rx] Frequency Standards

[John Miles]

Wow.  Those are some pretty amazing requirements.  If a 10811E would have
caused an increase in BER, then yes, you'd better stick with the standard
you're using. :)  I would think that atmospheric perturbations between the
satellite and earth station would result in more phase noise than that.

That is one helluva nice OCXO.  It makes the Thunderbolt look like a VFO.

-- john KE5FX

  -----Original Message-----
  From: premium-rx-bounces at ml.skirrow.org
[mailto:premium-rx-bounces at ml.skirrow.org]On Behalf Of Gary Geissinger
  Sent: Tuesday, July 22, 2003 7:42 AM
  To: premium-rx at ml.skirrow.org
  Subject: RE: [Premium-Rx] Frequency Standards


  John,

  You hit the nail right on the head.

  "Trimble characterizes the phase noise of the Thunderbolt's output at
about 15 dB worse than an HP 10811E at 10 kHz from the carrier (-145 dBc/Hz
versus -160 dBc/Hz), and in my experience, you can take that to the bank."

  Here are the phase noise specs for the crystal oscillator we are using:

    10 Hz        -135 dBc/Hz
  100 Hz        -155 dBc/Hz
  1 kHz          -165 dBc/Hz
  10 kHz        -168 dBc/Hz
  50 kHz        -168 dBc/Hz
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