Doesn't the 5062 use M/N
Bert Kehren
In a message dated 6/25/2018 12:31:10 PM Eastern Standard Time,
rich...@karlquist.com writes:
On 6/24/2018 10:21 AM, cdel...@juno.com wrote:
> Hi,
>
> I've repaired a few 5065A A1 synthesizer modules recently and lets just
> say that they are not my
In message , "Richard (Rick
) Karlquist" writes:
>Did I miss the reason as to what was wrong with M/N?
I don't think there is anything wrong with M/N, but the A1 in
HP5065 suffers from dead/drifting/dying and obsolete components
in the divider.
I tried replacing the divider with a
On 6/24/2018 10:21 AM, cdel...@juno.com wrote:
Hi,
I've repaired a few 5065A A1 synthesizer modules recently and lets just
say that they are not my favorite repair!
I decided to go back to a project I started a while back to try and
replace the A1 module with a DDS implementation.
I built up
Hi,
My purpose was to provide an inexpensive (<$30.00) and simple way to
replace a defective A1 without degrading the performance the original A1
gave.
The Chinese DDS allows this without having to solder all those tiny pins!
Both styles actually performed better than the original, and the same
On 6/25/18 6:05 AM, Dana Whitlow wrote:
A useful hardware demonstration of DDS phase truncation is to do step a DDS
through a long
series of frequencies at a relatively low stepping rate, and view the
output with an FFT-based
(real-time) spectrum analyzer set for spectrogram display. Watch
On 6/24/18 2:05 PM, Hal Murray wrote:
Poul-Henning Kamp said:
That's one of the reason I went with Bo's DDS (32bit0 instead of the eBay
modules (20-24 bit). Higher resolution mitigates the spur problem at least a
little bit.
I think it also moves the spurs closer in. But maybe if they are
On Sun, 24 Jun 2018 14:05:52 -0700
Hal Murray wrote:
> Does anybody have a handy formula for the spurs given the parameters for a
> DDS?
I think, you are looking for [1] and [2].
But please note, that both phase truncation and DAC non-linearity
spurs can be reduced by the right use of
In principle DDS spurs due to phase truncation can be largely suppressed using
well known techniques when an FPGA is used just leaving spurs due to the DAC.
Bruce
> On 25 June 2018 at 06:00 Attila Kinali mailto:att...@kinali.ch > wrote:
>
>
> On Sun, 24 Jun 2018 17:29:43 +
>
Poul-Henning Kamp said:
> That's one of the reason I went with Bo's DDS (32bit0 instead of the eBay
> modules (20-24 bit). Higher resolution mitigates the spur problem at least a
> little bit.
I think it also moves the spurs closer in. But maybe if they are small enough
they get lost in the
In message , Bob kb8tq writes:
>The result can be a very close in spur ( like << 1 Hz) that really rips up
>your ADEV since it passes through all the cleanup PLL’s ….
Indeed.
That's one of the reason I went with Bo's DDS (32bit0 instead of
the eBay modules (20-24 bit). Higher
Hi
One of the things I’ve run into doing Rb’s this way is that the spurs out of
the DDS
are not always the same device to device. They also change a lot with small
tuning
changes. The result can be a very close in spur ( like << 1 Hz) that really
rips up
your ADEV since it passes through all
On Sun, 24 Jun 2018 20:06:17 +0200
Attila Kinali wrote:
> Oops... I just realized that the mixer part number is wrong.
> it should be LTC5599 instead of LTC5598.
Or not... please ignore me.. I seem to be confused.
Attila Kinalie
--
It is upon moral qualities that a
On Sun, 24 Jun 2018 20:00:22 +0200
Attila Kinali wrote:
> Attached is the page of my notebook with the schematic of the idea.
Oops... I just realized that the mixer part number is wrong.
it should be LTC5599 instead of LTC5598.
Attila Kinali
--
It is upon moral
In message , cdel...@juno.com writes:
>I've repaired a few 5065A A1 synthesizer modules recently and lets just
>say that they are not my favorite repair!
None of my two 5065A's have particular good A1's, so I don't know
what the baseline performance should be like.
I have been playing
14 matches
Mail list logo
