[DSP-10] Source of HP10811

[ak0b]

A source of the older version of the 10811 is the HP 5328A.   Ebay has both
new and old versions show up but the cost is always  high,  but old  HP
5328A can be found on the web at some of the surplus test equipment houses
for around $150 each.  You can not take a seller's word for which version of
the std is installed, but for $150 you get a nice counter plus one of the
standard osc.

Stan ak0b



----- Original Message -----
From: "Pieter" <sietetrescincoprimo@hotmail.com>
To: <dsp-10@mailman.qth.net>
Sent: Tuesday, March 26, 2002 21:19 PM
Subject: [DSP-10] Source of HP10811


> Hi,
>
> Does anyone know where I can find an HP10811 10 MHz oscillator cheap? I
have
> seen a couple inside HP counters on ebay but I would like to just get the
> source. As a work around of not having the HP10811, I was thinking of the
> following:
>
> Take a really good OCXO that is not tunable and feed it into an Analog
> Devices AD9854 DDS chip. Use the times (x5) multiplier so that the
reference
> is 50 MHz inside the chip. This chip has a 48bit frequency register so the
> output frequency could be set in steps of
> .00000017763568394002504646778106689453 Hz at ANY output frequency between
0
> and ~20 MHz. I have a couple of these chips already on boards so I would
not
> have to solder the 80 pin chip :). The phase detector would be very
similar
> to the Shera board, but would not require a DAC to drive it since the
serial
> data would set the DDS instead. Also, I could come up with the tuning
words
> that limit the tuning range to 16 Hz around any desired frequency and not
> have to manually tune the OCXO. Also the OCXO would not have to be exactly
> at 10 MHz. Any ideas?
>
> Pieter Ibelings
> N4IP
>
>
>
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