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My friend have in his company but internal security and copyright policy is very strict. No chance to make a copy of all schematics.?

Milan

On Thu, 15 Nov 2018, 10:12 alberto.vaudagna <alberto.vaudagna@... wrote:

So just out of curiosity where didi you find the schematics?? I thought there no schematics avaible anywhere for this device?

Il giorno mer 14 nov 2018 alle ore 23:41 Milan Vasic <vasa1958@...> ha scritto:

Someone ask for ESG Fractional N divider.

Not my and don't ask for better resolution.?

Milan

On Sun, 11 Nov 2018, 14:35 Tom B <tbryan@... wrote:

Hi Leo,

Which synthesizer board do you have?

There is a service note (E4436B-01F) that says: "Serial Numbers:
[0000A00000 / 9999Z99999]" "The ESG-B AP/DP Family of Signal Generators
has been experiencing failures in the Frac-N board assemblies. This is
due to a failure in the divide-by-eight circuit of the Divider chip A24
U313 which causes the ESG to display Error 511 "Output unleveled". All
ESG-B AP/DP units with the serial numbers mentioned above may experience
Error 511 along with UNSTABLE or NO OUPUT below 1GHz. If this occurs,
the A24 Frac-N/Divider Assembly (E4423- 60019) needs to be replaced.
This assembly should be ordered using part number E4423-69019 and should
be treated as a warranty repair. The defective assembly should then be
returned with documentation referencing this service note as "Error 511"."

Tom Bryan



On 11/11/2018 4:39 AM, Leo Bodnar wrote:
> I have E4435B signal gen from ESG series that loses output in certain
> parts of its output range 250..350MHz, 500..700MHz, etc.
> The problem seems to be in the VCO or its PLL loop.
> Its output is supposed to be 500..1000MHz before further
> multiplication/division but lower part of the range is unstable. As
> you go down in frequency from 1000MHz to 500MHz, somewhere around
> 690MHz it becomes noisy and at 680MHz it loses signal altogether.
> These siggens sometimes have prescaler U313 1GC1-4210 failure, but
> here it does not seem the case as it is further down the signal path -
> after YIG multiplier that converts 0.5-1GHz VCO output into 4-8GHz signal.
>
>

--

Alberto Vaudagna

IDRA-XAM Electronics Firmware and Software division manager- Team H2politO

H2politO – Politecnico di Torino

Mob:?+39?347?3906977

alberto.vaudagna@...

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